AGRICULTURAL PESTICIDE USE AND RELATIVE HAZARD RATINGS IN EPA REGION VI STATES AND A TEXAS CASE STUDY OF THE TRINITY RIVER BASIN Principal Investigator: John A. Jackman Professor and Extension Entomology Specialist Texas Agricultural Extension Service FINAL REPORT Submitted to: United States Environmental Protection Agency Region 6 1445 Ross Avenue Suite 1200 Dallas, Texas 75202-2733 104 (b) (3) Grant for Evaluation of Risk to Aquatic Life and Human Health November 18, 1994 ------- AGRICULTURAL PESTICIDE USE AND RELATIVE HAZARD RATINGS IN EPA REGION VI STATES AND A TEXAS CASE STUDY OF THE TRINITY RIVER BASIN Principal Investigator: John A. Jackman Professor and Extension Entomology Specialist Texas Agricultural Extension Service FINAL REPORT Submitted to: United States Environmental Protection Agency Region 6 1445 Ross Avenue Suite 1200 Dallas, Texas 75202-2733 104 (b) (3) Grant for Evaluation of Risk to Aquatic Life and Human Health November 18, 1994 1 ------- TABLE OF CONTENTS Page # INTRODUCTION 6 AGRICULTURAL PESTICIDE USE IN EPA REGION VI 7 AGRICULTURAL PESTICIDE USE IN THE TRINITY RIVER BASIN 7 HAZARD RATING METHODS 11 EXPLANATION OF HAZARD RATING COEFFICIENTS 14 DISCUSSION 29 ENVIRONMENTAL AND BIOLOGICAL MONITORING STUDIES 36 COMPARISON OF URBAN PESTICIDE HAZARD TO AGRICULTURAL HAZARD 38 SIMULATION MODELS AND GEOGRAPHIC INFORMATION SYSTEMS 39 CONCLUSIONS 40 ACKNOWLEDGEMENTS 42 LITERATURE CITED 43 APPENDICES 46 2 ------- TITLE: Agricultural Pesticide Use and Relative Hazard Ratings in EPA Region VI States and a Texas Case Study of the Trinity River Basin AUTHOR: John A. Jackman, Principal Investigator ABSTRACT Estimates of agricultural pesticide use in EPA Region VI by state for 1992 and in the Trinity River Basin (TRB) in Texas by hydrologic unit (HU) for 1990 were taken from published reports. A hazard rating coefficient emphasizing mobility was calculated for each pesticide using toxicity to bluegills, toxicity to rats, field half life, and solubility in water. A second hazard rating coefficient emphasizing bioaccumulation was calculated for each pesticide using toxicity to fish, toxicity to rats, field half life, and the octanol/water partition coefficient. Hazard ratings were normalized by multiplying total pesticide applied and dividing by the land area of the state, HU or TRB, as appropriate. Normalized hazard ratings are reported by state, by HU and for the TRB for agricultural pesticides reported from the region. Thirty pesticides which had high normalized hazard ratings are discussed. Normalized hazard rating coefficients are displayed on maps by HU in the TRB along with hydrologic information demonstrating how this information can be made available in a geographic information system format. 3 ------- List of Tables Table 1. Annual total agricultural pesticide applied in EPA Region VI by State and by pesticide for 1992 page 8. Table 2. Total pounds of agricultural pesticide applied in the Trinity River Basin in Texas by pesticide in 1990 page 12. Table 3. Hazard rating coefficients emphasizing mobility (HRCM) for agricultural pesticides used in the EPA Region VI page 16. Table 4. Hazard rating coefficients emphasizing bioaccumulation (HRCB) for agricultural pesticides used in the EPA Region VI page 17. Table 5. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides used in EPA Region VI by State page 19. Table 6. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides used in EPA Region VI by State. .. page 23. Table 7. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides used in the Trinity River Basin page 27. Table 8. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides used in the Trinity River Basin. . page 28. 4 ------- List of Appendices Appendix A. Definitions page 46. Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin in Texas by hydrologic unit (HU) and crop page 47. Appendix C. Application^ rates of agricultural pesticides reported from the Trinity River Basin by crop page 62. Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and by pesticide in 1990 page 67. Appendix E. LC50 values for fish for agricultural pesticides used in EPA Region VI (Pesticides were ranked from most toxic to least toxic) page 76. Appendix F. Oral LD50 values for rats for agricultural pesticides used in EPA Region VI (Pesticides were ranked from most toxic to least toxic). .. page 77. Appendix G. Field half life values for agricultural pesticides used in EPA Region VI (Pesticides were ranked from most persistent to least persistent), page 78. Appendix H. Solubility in water of agricultural pesticides used in EPA Region VI (Pesticides were ranked from most soluble to least soluble) page 79. Appendix I. Octanol/water partition coefficients for agricultural pesticides used in EPA Region VI (Pesticides were ranked from most likely to bioaccumulate to least likely to bioaccumulate) page 80. Appendix J. Land area by state in EPA Region VI and land area by hydrologic unit (HU) in the Trinity River Basin in Texas page 81. Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide page 82. Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide page 91. Appendix M. Maps of the Trinity River Basin in Texas generated with ARC/INFO. page 100. 5 ------- INTRODUCTION The Environmental Protection Agency (1990a, b) recently completed a comparative risk project in Region VI, ranking 22 environmental problem categories by ecological risk and human health risk. A primary conclusion of that study was that pesticides were among the problem categories representing the highest risk to both the environment and human health. Periodic reassessment of the relative hazards of pesticides to the environment and human health is justified as new pesticide use data and hazard rating methods become available. Relative hazard rating is a useful technique to establish priorities for regulatory agencies and other concerned groups. Results of surveys of agricultural pesticide use provide estimates of pesticide loading into specific areas which is an important part of hazard rating. Chemical characteristics make up another important aspect of hazard ratings. This study was undertaken as part of the reassessment of hazard of pesticides in EPA Region VI with emphasis on agricultural pesticides in surface waters. Pesticides in surface water are particularly important because many aquatic organisms are sensitive to pesticides and some pesticides bioaccumulate in fish tissue, thereby representing a possible risk to human consumers. The procedure followed in this project was,: to locate agricultural pesticide use data for the EPA Region VI; to locate agricultural pesticide use data specifically in the Trinity River Basin (TRB); to prepare a list of agricultural pesticides used in EPA Region VI and the TRB; to select hazard rating coefficients which allow comparison of relative hazard between pesticides; to calculate the hazard rating coefficients by pesticide for those pesticides used in EPA Region VI and the TRB; to incorporate total pesticide applied and land area in normalized hazard rating coefficients; and to rank pesticides by normalized hazard ratings coefficients in the EPA Region VI and the TRB. Rankings of normalized hazard rating coefficients for agricultural pesticides provide guidance for agricultural pesticide use monitoring projects and setting priorities for studies of specific pesticides. 6 ------- AGRICULTURAL PESTICIDE USE IN EPA REGION VI Agricultural pesticide use estimates by state utilized in this report were taken from a national agricultural pesticide use survey with estimates by state (USDA 1992, 1993a, b). Total pesticide applied by crop was reported for major crops and frequently reported pesticides. A summary that combines the estimated use for all crops in EPA Region VI by state was completed by pesticide (Table 1). Two other studies were not as complete relative to the objectives of this study compared to the USDA (1992, 1993a, b) study. Gianessi and Puffer (1991) provide estimates of herbicide use only by county relying on USDA estimates. The U.S. Department of Commerce, National Oceanic and Atmospheric Administration (Pait et al. 1992) published on agricultural pesticide use in coastal areas of the US and thus overlaps the EPA, Region VI. AGRICULTURAL PESTICIDE USE IN THE TRINITY RIVER BASIN Holloway et al. (1990) reported estimates of the number of "acre treats" in Texas by pesticide, by crop, and by hydrologic unit (HU). Reporting agricultural pesticide use estimates by HU provided estimates of pesticide use in contiguous units designed for surface water management. The survey of agricultural pesticide use based on reports from county Extension agents in Texas (Holloway et al. 1990) was utilized as the source for pesticide use estimates within Texas specifically in the TRB (Appendix B). "Acre treats" as utilized by these authors were a sum of the acres treated such that when a specific acre was treated twice it was counted twice. Consequently, if the same ten acre field was treated ten times the "acre treats" would be one hundred. Acre treats are referred to as acre treatments in this report. Also, all estimates of 2,4-D should be considered as acid equivalents. At the recommendation of Holloway (personal communication), independent estimates of application rates by crop were made for each pesticide and used to calculate total pesticides applied from acre treatments in his report. Application rates (pounds/acre) of agricultural pesticides reported from the TRB 7 ------- Table 1. Annual total agricultural pesticide applied in EPA Region VI by State and by pesticide for 1992.* PESTICIDE | STATE | + + + . + + | AR | LA | OK | TX | + + + + + I 1000 lbs. I 1000 lbs. I 1000 lbs. | 1000 lbs. | 2,4-D ACID ACEPHATE ACIFLUORFEN SODIUM SALT ALACHLOR ALDICARB 143 243 430 115 0 64 48 181 132 436 217 ATRAZINE AZINPHOS-METHYL BENEFIN BENOMYL BENSULFURON METHYL 75 150 2 45 61 1190 333 0 6 BENSULIDE BENTAZON SODIUM SALT BIFENTHRIN BROMACIL BROMOXYNIL OCTANOATE ESTER 334 138 103 18 1 0 CAPTAN CARBARYL CARBOFURAN CHLORIMURON ETHYL CHLOROSULFURON 86 3 22 30 60 117 CHLOROTHALONIL CHLORPYRIFOS CLOMAZONE COPPER HYDROXIDE CYANAZINE 511 149 426 298 12 14 CYCLOATE CYFLUTHRIN CYPERMETHRIN CYROMAZINE CHLORTHAL DIMETHYL 23 11 7 14 5 14 2 0 104 DIAZINON DICROTOPHOS DIETHYL ETHYL DIMETHOATE DISULFOTON 22 49 26 139 55 208 18 99 1 DIURON DSMA ENDOSULFAN ESFENVALERATE ETHALFLURALIN 89 290 170 175 182 34 11 4 8 ------- Table 1. Annual total agricultural pesticide applied in EPA Region VI by State and by pesticide for 1992.* (continued) PESTICIDE | STATE + + + + | AR | LA | OK | TX H | — 1 1000 lbs. I 1000 lbs. I 1000 lbs. | 1000 lbs. BTHEPHON ETRIDIAZOLE FENOXAPROP ETHYL FLUAZIFOP—P-BUTYL FLUOMETURON 340 11 27 24 679 131 35 22 500 13 194 FOMESAFEN GLYPHOSATE AMINE SALT IMAZAQUIN ACID IPRODIONE LAMBDACYHALOTHRIN 59 61 96 7 26 39 20 10 5 25 LINDANE LINURON MALATHION MANCOZEB MEPIQUAT CHLORIDE 6 7 0 4 9 51 METALAXYL METHAMIDOPHOS METHAZOLE METHOMYL METHYL PARATHION 54 50 163 104 857 176 26 7 54 328 METOLACHLOR METRIBUZIN MOLINATE MONOSODIUM METHANEARSONATE NAPROPAMIDE 464 76 1605 727 592 105 1069 816 584 113 1 NAPTALAM NICOSULFURON NORFLURALIN OXAMYL OXYFLUORFEN 320 98 247 16 9 6 161 0 PARAQUAT DICHLORIDE SALT QUINTOZENE PENDIMETHALIN PERMETHRIN PETROLEUM OIL 104 640 70 156 208 5 623 8 94 PHOSALONE PHOSMET PROFENOFOS PROMETRYN PROPANIL 63 131 6033 286 1383 0 4 716 9 ------- Table 1. Annual total agricultural pesticide applied in EPA Region VI by State and by pesticide for 1992.* (continued) PESTICIDE I STATE | + + + + + | AR | LA | OK | TX | + + + + + | 1000 lbs. | 1000 lbs. | 1000 lbs. | 1000 lbs. | PROPICONAZOLE QUIZALAFOP ETHYL SETHOXYDIM SODIUM CHLORATE SULFUR 15 20 30 6 6 29 138 144 SULPROFOS TERBUFOS THIDIAZURON THIOBENCARB TRALOMETHRIN 459 746 294 32 107 55 TRIFLURALIN TRIOPHANATE METHYL TRIPHENYLTIN HYDROXIDE ZIRAM 1647 531 3080 7 0 6 * Data summarized for field crops and vegetable in 1992 (USDA 1993a, b) and fruit and nut crops in 1991 (USDA 1992). Only crops with significant acreage were included. Only pesticides with significant quantities of use were reported. No pesticide use was reported for New Mexico. Zero values indicate that less than 1000 pounds was reported. 10 ------- by crop were taken from product labels (Appendix C). Rates of active ingredient per acre were estimated using the rate/acre from pesticide labels by crop. For each crop a maximum rate and a minimum rate were taken from the pesticide labels and a mean rate was calculated. Medians were reported when a range of application rates was listed on the label. A few rates of active ingredient per acre were taken from USDA (1992, 1993a, b). The mean application rates were used to calculate the total pounds applied for each pesticide for each hydrologic unit and each crop (Appendix D). Estimates of pesticide use by pesticide were summed by crop and by HU to provide totals for the TRB (Table 2). HAZARD RATING METHODS Agricultural pesticides reported by states in EPA Region VI (USDA 1992, 1993a, b) and from the Trinity River Basin in Texas (Holloway et al. 1990) are listed (Appendix E). Characteristics of these pesticides are reported (Appendix E-I) and sources of this information are noted. Chemical and toxicological characteristics of individual pesticides can be used directly as indicators of certain types of hazard. The values for LCS0 for fish, LD50 for mammals, and field half life were selected as factors that are important indicators of hazard of an agricultural pesticide. Solubility in water and the octanol/water partition coefficient were selected as indicators of pesticide fate. Hazard from highly mobile pesticides was indicated by high solubility and would generally indicate a potential acute toxicity hazard. Mobility of a pesticide is important because surface water runoff from agricultural lands is considered to be the major route of pesticide transport into the aquatic environment (Pait et al. 1992 and references therein). Bioaccumulation hazard was indicated by high octanol/water partition coefficient and would generally indicate a long term hazard due to persistance in organisms. An explanation of the constants used to calculate hazard rating coefficients follows. 11 ------- Table 2. Total agricultural pesticide applied in the Trinity River Basin by pesticide in 1990. TOTAL APPLIED TOTAL APPLIED PESTICIDE (lbs.) PESTICIDE (lbs.) PROPANIL 111506 MONOSODIUM METHANEARSONATE 2535 2,4-D ACID 100820 BENOMYL 2207 ATRAZINE 80088 CHLORSULFURON 2079 PROMETRYN 72783 PARAQUAT 1870 DISULFOTON 72578 THIDIAZURON 1746 ARSENIC ACID 64271 LINURON 1516 TERBUFOS 61373 AZINPHOS-METHYL 1450 FLUAZIFOP-P-BUTYL 40968 DSMA 1237 METHYL PARATHION 40073 MONOCROTOPHOS 1168 TRIFLURALIN 37318 IPRODIONE 1077 ALACHLOR 36885 OXYDEMETON-METHYL 1014 CARBARYL 32114 DIAZINON 996 METOLACHLOR 30267 DICLOFOP-METHYL 805 ALDICARB 27238 SULPROFOS 787 PARATHION 24170 2,4-DB 672 BUTIFOS 20928 PHOSPHAMIDON 649 DICAMBA 19982 FLUOMETURON 598 GLYPHOSATE 16415 SULPHUR 563 MOLINATE 15067 BENSULIDE 550 ACEPHATE 14885 FENVALERATE 541 DIMETHOATE 14809 CYPERHETHRIN 518 CARBOFURAN 14398 ESFENVALERATE 339 THIODICARB 13566 TRICLOPYR 289 THIOBENCARB 13496 PETROLEUM OIL 267 DICROTOPHOS 13050 IMAZAQUIN ACID 254 PENDIMETHALIN 11727 METALAXYL 225 CHLORPYRIFOS 11325 CHLORTHAL DIMETHYL 210 PROPARGITE 9362 BIFENTHRIN 202 SETHOXYDIM 9202 VERNOLATE 177 MANCOZEB 8376 CLOPYRALID 159 CHLOROTHALONIL 7926 TRIPHENYLTIN 144 PROFENOFOS 7755 ORYZALIN 144 BENTAZON 7390 METSULFURON-METHYL 105 MALATHION 6535 CYHALOTHRIN 102 ETHEPHON 6443 ENDOSULFAN 76 QUINTOZENE 6375 CYFLUTHRIN 39 DIURON 5374 ENDOTHALL 34 METHOMYL 5140 CAPTAN 30 CYANAZINE 4865 MEVINPHOS 28 TRIADIMEFON 4080 PHOSMET 25 PROPICONAZOLE 3977 COPPER HYDROXIDE 15 PHOSALONE 3679 PERMETHRIN 6 ACIFLUORFEN 2976 METRIBUZIN 6 BROMOXYNIL 2912 MEPIQUAT 2 FOMESAFEN 2729 *Values were calculated from acre treatment estimates from Holloway et al. (1990) and mean application rates from product labels. Picloram and 2,4-D combinations for brush control in pastures were not included because rates were dependent on brush intensity rather than per acre. 12 ------- LC50 FOR FISH. The 96 hour LC50 for bluegills was used whenever possible in this study because it reflects the sensitivity of a naturally occurring fish in the region. A few LC50 values for other fish species were substituted when the data for bluegills was not available. Agricultural pesticides reported in the Region VI states were arranged in Appendix E from most toxic to least toxic based on LCS0 for fish. LDS0 FOR MAMMALS. LD50 (ug/1, 96 hours) of rats was selected for use in this study. Whenever values were available by sex, the value for male rats was used. Agricultural pesticides reported in the Region VI states are arranged in Appendix F from most toxic to least toxic based on LD50 values for mammals. FIELD HALF LIFE. A longer half life means that the pesticide persists in the environment while a short half life means that the pesticide readily breaks down. Agricultural pesticides reported in the Region VI states were arranged in Appendix G ranked from most persistent to least persistent based on field half life. Actual values of field half life of a pesticide in the environment can vary depending on soil type, organic matter, weather conditions, etc. Values reported here are those of Wauchope et al. (1992). WATER SOLUBILITY. Water solubility is the concentration of a pesticide that dissolves in water (ppm) (EXTOXNET 1989). A high value for water solubility indicates that the pesticide is readily dissolved and that it would move readily in runoff water or percolation. A low solubility implies that the pesticide would remain at the application site and generally is more likely to accumulate in fats that a pesticide with high water solubility. Agricultural pesticides reported in the Region VI states were arranged in Appendix H from most soluble in water to least soluble in water. OCTANOL/WATER PARTITION COEFFICIENT (Kow). The octanol/water partition coefficient is an indicator of soil adsorption and bioaccumulation (EXTOXNET 1989). Agricultural pesticides reported in the Region VI states are arranged in Appendix I from least adhesive to most adhesive to organic material based on the octanol/water partition coefficient. Octanol/water partition coefficients (Kow) were available for most pesticides that were reported as used in Region VI. 13 ------- EXPLANATION OF HAZARD RATING COEFFICIENTS Each specific chemical characteristic provides a measure that can be used to compare pesticides and thus the hazard they pose. However, the hazard posed by chemicals that are highly water soluble but have a short half life is much different from the hazard posed by chemicals that are low in water solubility and have a long half life. Therefore, hazard ratings that combine chemical characteristics into more general hazard ratings are useful for comparison of hazards of very different chemicals. Pait et al. (1992) combined hazard ratings by first scaling each of four chemical characteristic of interest to a range of 0 to 1, with 0 being least hazardous and 1 most hazardous of the chemicals in the study. Then chemical characteristics of each chemical were rescaled and combined to produce a single hazard rating in the range of 0 to 1. In this study, two combined hazard rating coefficients were calculated for each agricultural pesticide reported as used in EPA Region VI following the methods of Pait et al. (1992) but using different chemical characteristics. First, LC50 for fish, LD50 for mammals, field half life and solubility were combined to produce a combined hazard rating coefficent emphasizing mobility (HRCM). Chemicals with a high solubility were rated as hazardous to emphasize the mobility of the chemical in aquatic environments. Because HRCM provides a hazard rating that combines mobility, toxicity and persistence of a chemical, this hazard rating would be useful to rank acute toxicity hazards in aquatic ecosystems. The formula for Ct below was used to scale half life (t 1/2) and solubility following the method used by Pait et al. (1992). High values for these parameters indicate a high hazard. ci " (*1 " XmiJ/tX™, " xmi„) The formula for C2 below was used to scale LC50 and LDS0 following the method used by Pait et al. (1992). Low values for these parameters indicate high hazard. C2 = 1 - ((x, - xro1n)/(xm„ - xmln)) 14 ------- Hazard rating coefficients emphasizing mobility (HRCM) were then calculated for each agricultural pesticide using the formula below. Hazard rating coefficients emphasizing mobility for agricultural pesticides reported in the EPA Region VI are reported in Table 3 arranged by most to least hazardous. UDPVf — n >25 v p .25 v p .25 v n .25 ttKUfl - *"IC50 * ^LD50 X 1/2 X US The second combined hazard rating coefficient included the log of the octanol/water partition coefficient (Kow) with LC50 for fish, LD50 for mammals and field half life to emphasize bioaccumulation (HRCB). HRCB provides a hazard rating that combines toxicity, persistence and bioaccumulation potential. Bioaccumulation is of concern in mammals (including humans), fish and birds, especially those species which are predators. The formula for C1 below was used to scale half life (t 1/2) and KOM following the method used by Pait et al. (1992). High values for these parameters indicate a high hazard. C1 " (*1 " Xm1n)/(Xm« " Xn,iJ The formula for C2 below was used to scale LC50 and LDS0 following the method used by Pait et al. (1992). Low values for these parameters indicate high hazard. C, - 1 - ((x, - xmln)/(xmiX - xm1n)) Hazard rating coefficients emphasizing bioaccumulation (HRCB) were then calculated for each agricultural pesticide using the formula below. Hazard rating coefficients emphasizing bioaccumulation for agricultural pesticides reported in the EPA Region VI are reported in Table 4 arranged by most to least hazardous. HRCB « CLC50 -2S x CLD50 25 x Ct 1/2 -2S x CKow 25 Each factor used in calculating HRCM and HRCB were given equal weight in contributing to the final value. A value near zero would result if all four values were very low. A high score in any one factor would assure a hazard rating coefficient of at least .25. A value of 1 would occur only when all factors were maximal for hazard. The total pounds of chemical applied and the total land area impacted are also important in assessing the hazard of a chemical. Normalizing over the total 15 ------- Table 3. Hazard rating coefficients emphasizing mobility (HRCM) for agricultural pesticides used in EPA Region VI.* RANK PESTICIDE HRCM RANK PESTICIDE HRCM 1 MONOSODIUM METHANEARSONATE 0.54887 53 TRALOMETHRIN 0.03699 2 PARAQUAT 0.48502 54 ATRAZINE 0.03637 3 ARSENIC ACID 0.37389 55 PROMETRYN 0.03504 4 BENTAZON 0.27550 56 CARBARYL 0.03403 5 MONOCROTOPHOS 3.26296 57 VERNOLATE 0.03376 6 GLYPHOSATE 3.25247 58 TRICLOPYR 0.03333 7 FOMESAFEN 3.25129 59 DISULFOTON 0.03159 8 DICROTOPHOS 3.24167 60 BENSULIDE 0.03090 9 PHOSPHAMIDON 3.22866 61 THIOBENCARB 0.02918 10 CYROMAZINE 3.22547 62 PHOSMET 0.02741 11 PICLORAM SALT 3.22273 63 PARATHION 0.02669 12 OXYDEMETON-METHYL 3.20765 64 AZINPHOS-METHYL 0.02576 13 ETHEPHON 3.19718 65 METHYL PARATHION 0.02533 14 CLOPYRALID 3.19561 66 BENSULFURON 0.02525 15 IMAZAQUIN ACID 3.19226 67 MANCOZEB 0.02506 16 2,4-DB 3.18588 68 PROFENOFOS 0.02415 17 METHAMIDAPHOS 3.18488 69 THIDIAZURON 0.02293 18 DICAMBA SALT 3.18238 70 THIODICARB 0.02177 19 ACIFLUORFEN 3.16497 71 PHOSALON 0.01914 20 METHOMYL 3.14883 72 SULPROFOS 0.01789 21 ACEPHATE 3.14500 73 CHLORTHAL DIMETHYL 0.01708 22 MEVINPHOS 3.13915 74 PROPARGITE 0.01634 23 OXAMYL 3.12975 75 PENDIMETHALIN 0.01570 24 ENDOTHALL 3.12024 76 TERBUFOS 0.01541 25 NAPTALAM 3.11864 77 IPRODIONE 0.01539 26 METALAXYL 0.11842 78 FLUAZIFOP-P-BUTYL 0.01503 27 DIMETHOATE 0.10032 79 ENDOSULFAN 0.01466 28 ALDICARB 0.09457 80 QUIZALOFOP ETHYL 0.01458 29 METSULFURON METHYL 0.08999 81 METHAZOLE 0.01447 30 CHLORSULFURON 0.08959 82 CHLORPYRIFOS 0.01378 31 METRIBUZIN 0.07118 83 THIOPHANATE-METHYL 0.01278 32 METOLACHLOR 0.07100 84 QUINTOZENE 0.01274 33 CHLORIMURON ETHYL 0.06553 85 FENOXAPROP ETHYL 0.01162 34 CLOMAZONE 0.06138 86 BIFENTHRIN 0.01007 35 BROMACIL 0.06116 87 OXYFLUORFEN 0.00939 36 MOLINATE 0.06032 88 CAPTAN 0.00881 37 CARBOFURAN 0.05953 89 BROMOXYNIL 0.00726 38 SETHOXYDIM 0.05534 90 LAMBDACYHALOTHRIN 0.00646 39 PROPICONAZOLE 0.05382 91 PERMETHRIN 0.00626 40 2,4-D ACID 0.05043 92 BENEFIN 0.00000 41 ETRIDIAZOLE 0.04563 93 BENOMYL 0.00000 42 LINURON 0.04391 94 CHLOROTHALONIL 0.00000 43 DIURON 0.04293 95 CYFLUTHRIN 0.00000 44 ALACHLOR 0.04211 96 CYPERMETHRIN 0.00000 45 LINDANE 0.04130 97 DICLOFOP-METHYL 0.00000 46 NAPROPAMIDE 0.04065 98 ESFENVALERATE 0.00000 47 DIETHATYL ETHYL 0.03996 99 ETHALFLURALIN 0.00000 48 CYCLOATE 0.03947 100 MALATHION 0.00000 49 CYANAZINE 0.03936 101 ORYZALIN 0.00000 50 DIAZINON 0.03935 102 PETROLEUM OIL 0.00000 51 FLUOMETURON 0.03926 103 PROPANIL 0.00000 52 TRIADIMEFON 0.03740 104 TRIFLURALIN 0.00000 * Data were not available to calculate HRCM for BUTIFOS, COPPER HYDROXIDE, DSMA, FENVALERATE, FURORE, NICOSULFURON, SODIUM CHLORATE, SULFUR, TRIPHENYLTIN, and ZIRAM. 16 ------- Table 4. Hazard rating coefficients emphasizing bioaccumulation (HRCB) for agricultural pesticides used in EPA Region VI.* RANK PESTICIDE HRCB RANK PESTICIDE HRCB 1 ARSENIC ACID 0.92558 43 2,4-D ACID 0.22351 2 PARAQUAT 0.58485 44 ALACHLOR 0.22287 3 PROPICONAZOLE 0.36514 45 DICAMBA 0.22062 4 PICLORAM SALT 0.33438 46 BENTAZON 0.21943 5 CHLORTHAL DIMETHYL 0.33414 47 TRALOMETHRIN 0.21586 6 ETRIDIAZOLE 0.33195 48 PROFENOFOS 0.21542 7 SULPROFOS 0.32789 49 PARATHION 0.21498 8 DIURON 0.31951 50 ENDOTHALL 0.21369 9 BENSULIDE 0.31804 51 OXYFLUORFEN 0.21285 10 METOLACHLOR 0.30818 52 METHAZOLE 0.21188 11 METALAXYL 0.30597 53 BROMOXYNIL 0.20955 12 GLYPHOSATE 0.30458 54 THIDIAZURON 0.20920 13 IMAZAQUIN ACID 0.30276 55 THIODICARB 0.20839 14 CARBOFURAN 0.30009 56 AZINPHOS-METHYL 0.20822 15 LINURON 0.29890 57 QUINTOZENE 0.20709 16 MANCOZEB 0.29227 58 ETHEPHON 0.20702 17 MONOCROTOPHOS 0.28937 59 DIMETHOATE 0.20470 18 METHOMYL 0.28735 60 OXYDEMETON-METHYL 0.19630 19 ATRAZINE 0.28578 61 BIFENTHRIN 0.19246 20 METRIBUZIN 0.28314 62 PERMETHRIN 0.18987 21 ALDICARB 0.28244 63 TERBUFOS 0.18009 22 PROPARGITE 0.28144 64 FENOXAPROP ETHYL 0.17781 23 ENDOSULFAN 0.27450 65 METHYL PARATHION 0.17421 24 CHLORIMURON ETHYL 0.27284 66 CYPERMETHRIN 0.17118 25 PEND1METHALIN 0.27190 67 SETHOXYDIM 0.17042 26 DIAZINON 0.27015 68 ACEPHATE 0.16935 27 DICROTOPHOS 0.26838 69 MEVINPHOS 0.16880 28 PROMETRYN 0.26493 70 BENSULFURON 0.16541 29 CHLORSULFURON 0.26457 71 IPRODIONE 0.14093 30 NAPROPAMIDE 0.26288 72 LAMBDACYHALOTHRIN 0.13113 31 METSULFURON-METHYL 0.26206 73 CAPTAN 0.10010 32 PHOSPHAMIDON 0.24470 74 BENOMYL 0.00000 33 CYANAZINE 0.24233 75 CHLOROTHALONIL 0.00000 34 CLOMAZONE 0.24064 76 CYFLUTHRIN 0.00000 35 MOLINATE 0.23882 77 DICLOFOP-METHYL 0.00000 36 DIETHATYL ETHYL 0.23783 78 ESFENVALERATE 0.00000 37 PHOSMET 0.23552 79 ETHALFLURALIN 0.00000 38 ACIFLUORFEN 0.23375 80 MALATHION 0.00000 39 CYCLOATE 0.23232 81 PETROLEUM OIL 0.00000 40 CHLORPYRIFOS 0.23217 82 PROPANIL 0.00000 41 THIOBENCARB 0.22851 83 TRIFLURALIN 0.00000 42 CARBARYL 0.22604 * Data were not available to calculate HRCB for 2,4-DB, BENEFIN, BROMACIL, BUTIFOS, CLOPYRALID, COPPER HYDROXIDE, CYROMAZINE, DISULFOTON, DSMA, FENVALERATE, FLUAZIFOP-P-BUTYL, FLUOMETURON, FOMESAFEN, FURORE, LINDANE, METHAMIDOPHOS, MONOSODIUM METHANEARSONATE, NAPTALAM, NICOSULFURON, ORYZALIN, OXAMYL, PHOSALONE, QUIZALOFOP ETHYL, SODIUM CHLORATE, SULFUR, THIOPHANATE-METHYL, TRIADIMEFON, TRICLOPYR, TRIPHENYLTIN, VERNOLATE, and ZIRAM. 17 ------- land area rather than using the acres treated provides a measure of hazard for a region, e.g., state, HU, or TRB, in this study. This method of normalization was similar to the normalized rating system used by Pait et al. (1992) for toxicity coefficients for comparison of hazards of pesticides used in coastal areas. HRCM and HRCB for each pesticide were multiplied by the estimated total pounds applied in each state (Table 1) and divided by the total land area in the state (Appendix J) to calculate normalized hazard rating coefficients emphasizing mobility in water (NHRCM) and normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for each pesticide and state. NHRCM and NHRCB allow comparison of relative hazard by pesticides and relative hazard between states. Normalized hazard rating coefficients emphasizing mobility and normalized hazard rating coefficients emphasizing bioaccumulation for agricultural pesticides in the EPA Region VI by state are reported in Table 5 and Table 6, respectively. NHRCM and NHRCB would be one if the hazard rating coefficient was one and one pound of pesticide was applied for every acre in the region. Actual values of NHRCM and NHRCB were always much less than one. For hydrologic units in the Trinity River Basin, HRCM and HRCB for each agricultural pesticide were multiplied by the estimated total pounds applied in each HU (Appendix D) and divided by the total land area in the HU (Appendix J) to calculate normalized hazard rating coefficients emphasizing mobility in water (NHRCM) (Appendix K) and normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) (Appendix L) for each agricultural pesticide and HU. In the Trinity River Basin, HRCM and HRCB for each agricultural pesticide were multiplied by the estimated total pounds applied in TRB (Table 2) and divided by the total land area in the TRB (Appendix J) to calculate normalized hazard rating coefficients emphasizing mobility in water (NHRCM) (Table 7) and normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) (Table 8) for each agricultural pesticide and HU. 18 ------- Table 5. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides used in EPA Region VI by State.* STATE PESTICIDE NHRCM AR MONOSODIUM METHANEARSONATE 0.011973 AR MOLINATE 0.002905 AR BENTAZON 0.002761 AR ETHEPHON 0.002012 AR TRIFLURALIN 0.001828 AR ACIFLUORFEN 0.001203 AR METOLACHLOR 0.000988 AR FLUOMETURON 0.000800 AR THIOBENCARB 0.000653 AR CYANAZINE 0.000604 AR IMAZAQUIN ACID 0.000554 AR ALACHLOR 0.000543 AR GLYPHOSATE 0.000462 AR FOMESAFEN 0.000445 AR OXAMYL 0.000382 AR ALDICARB 0.000326 AR PENDIMETHALIN 0.000302 AR BROMACIL 0.000253 AR METHOMYL 0.000223 AR 2,4-D ACID 0.000216 AR TERBUFOS 0.000212 AR HETRIBUZIN 0.000162 AR DICROTOPHOS 0.000160 AR DIMETHOATE 0.000147 AR PROMETRYN 0.000138 AR METHYL PARATHION 0.000124 AR DIURON 0.000115 AR AZINPHOS-METHYL 0.000058 AR SETHOXYDIM 0.000050 AR PROFENOFOS 0.000046 AR QUINTOZENE 0.000040 AR PROP I CON A Z OLE 0.000024 AR METHAZOLE 0.000023 AR ETRIDIAZOLE 0.000015 AR FLUAZIFOP-P-BUTYL 0.000011 AR FENOXAPROP ETHYL 0.000009 AR QUIZALAFOP ETHYL 0.000009 AR CHLORIMURON ETHYL 0.000004 AR BENSULFURON 0.000002 AR LAMBDACYHALOTHRIN 0.000001 AR CYPERMETHRIN 0.000000 AR BENOMYL 0.000000 AR CYFLUTHRIN 0.000000 AR ESFENVALERATE 0.000000 AR PROPANIL 0.000000 AR DSMA NA AR MEPIQUAT CHLORIDE NA AR NORFLURALIN NA 19 ------- Table 5. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides used in EPA Region VI by State.* (continued) STATE PESTICIDE NHRCM LA MONOSODIUM METHANEARSONATE 0.016063 LA MOLINATE 0.002313 LA METOLACHLOR 0.001507 LA PARAQUAT 0.001218 LA BENTAZON 0.001018 LA ETHEPHON 0.000926 LA METHYL PARATHION 0.000779 LA TRIPLURALIN 0.000704 LA FLUOMETURON 0.000704 LA CYANAZINE 0.000601 LA ACIFLUORFEN 0.000379 LA PROMETRYN 0.000359 LA GLYPHOSATE 0.000353 LA CLOMAZONE 0.000328 LA METRIBUZIN 0.000268 LA DIURON 0.000262 LA FOMESAFEN 0.000234 LA DICROTOPHOS 0.000225 LA CARBOFURAN 0.000183 LA ALDICARB 0.000162 LA TERBUFOS 0.000162 LA IMAZAQUIN ACID 0.000137 LA PENDIMETHALIN 0.000117 LA THIOBENCARB 0.000112 LA QUINTOZENE 0.000071 LA SETHOXYDIM 0.000057 LA ETRIDIAZOLE 0.000057 LA BENSULFURON 0.000055 LA METHAZOLE 0.000053 LA THIDIAZURON 0.000026 LA PROPICONAZOLE 0.000011 LA FENOXAPROP ETHYL 0.000009 LA CHLORIMURON ETHYL 0.000007 LA OXYFLUORFEN 0.000005 LA QUIZALAFOP ETHYL 0.000003 LA LAMBDACYHALOTHRIN 0.000002 LA PERMETHRIN 0.000001 LA 2,4-D ACID 0.000000 LA CYPERMETHRIN 0.000000 LA BENOMYL 0.000000 LA CYFLUTHRIN 0.000000 LA PROPANIL 0.000000 LA DSMA NA LA MEPIQUAT NA LA NORFLURALIN NA LA SODIUM CHLORATE NA OK DIMETHOATE 0.000317 OK 2,4-D ACID 0.000207 OK METHYL PARATHION 0.000101 OK CHLOROSULFURON 0.000000 20 ------- Table 5. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides used in EPA Region VI by State.* (continued) STATE PESTICIDE NHRCM TX TRIFLURALIN 0.000679 TX HONOSODIUM METHANEARSONATE 0.000369 TX DICROTOPHOS 0.000299 TX ATRAZINE 0.000258 TX METOLACHLOR 0.000247 TX PROMETRYN 0.000149 TX OXAMYL 0.000125 TX ALDICARB 0.000122 TX ACEPHATE 0.000114 TX ALACHLOR 0.000109 TX DIMETHOATE 0.000059 TX PENDIMETHALIN 0.000058 TX AZINPHOS-METHYL 0.000051 TX METHYL PARATHION 0.000049 TX METHOMYL 0.000048 TX DIURON 0.000046 TX FLUOMETURON 0.000045 TX CARBOFURAN 0.000041 TX CHLOROTHALONIL 0.000024 TX METALAXYL 0.000018 TX DIAZINON 0.000013 TX CARBARYL 0.000012 TX CHLORTHAL DIMETHYL 0.000010 TX GLYPHOSATE 0.000008 TX METHAMIDOPHOS 0.000007 TX MANCOZEB 0.000007 TX NAPTALAM 0.000006 TX CHLORPYRIFOS 0.000006 TX SULPROFOS 0.000005 TX DIETHATYL ETHYL 0.000004 TX ETRIDIAZOLE 0.000003 TX BENSULIDE 0.000003 TX ENDOSULFAN 0.000002 TX IPRODIONE 0.000002 TX CAPTAN 0.000001 TX CYCLOATE 0.000001 TX CYROMAZINE 0.000001 TX LINURON 0.000001 TX PHOSMET 0.000000 TX TRALOMETHRIN 0.000000 TX NAPROPAMIDE 0.000000 TX PERMETHRIN 0.000000 TX LINDANE 0.000000 TX DISULFOTON 0.000000 TX PROPICONAZOLE 0.000000 TX PHOSALONE 0.000000 TX BIFENTHRIN 0.000000 TX OXYFLUORFEN 0.000000 TX BROMOXYNIL 0.000000 21 ------- Table 5. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides used in EPA Region VI by State.* (continued) STATE PESTICIDE NHRCM TX CYPERMETHRIN 0.000000 TX BENOMYL 0.000000 TX CYFLUTHRIN 0.000000 TX ESFENVALERATE 0.000000 TX ETHALFLURALIN 0.000000 TX MALATHION 0.000000 TX PETROLEUM OIL 0.000000 TX TRIOPHANATE METHYL 0.000000 TX BENEFIN 0.000000 TX. COPPER HYDROXIDE NA TX NICOSULFURON NA TX SULFUR NA TX TRIPHENYLTIN NA TX ZIRAM NA * State and chemical combinations not appearing in the table had no use reported. No use was reported for New Mexico. NA - values not available due to missing data required for calculation. 22 ------- Table 6. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides use in EPA Region VI by State.* STATE PESTICIDE NHRCB AR MOLINATE 0.011501 AR TRIFLURALIN 0.010667 AR PENDIMETHALIN 0.005221 AR THIOBENCARB 0.005115 AR METOLACHLOR 0.004291 AR CYANAZINE 0.003716 AR ALACHLOR 0.002875 AR TERBUFOS 0.002480 AR BENTAZON 0.002199 AR ETHEPHON 0.002112 AR ACIFLUORFEN 0.001704 AR PROMETRYN 0.001041 AR ALDICARB 0.000975 AR 2,4-D ACID 0.000959 AR IMAZAQUIN ACID 0.000872 AR DIURON 0.000853 AR METHYL PARATHION 0.000852 AR QUINTOZENE 0.000646 AR METRIBUZIN 0.000646 AR GLYPHOSATE 0.000557 AR AZINPHOS-METHYL 0.000469 AR METHOMYL 0.000431 AR PROFENOFOS 0.000407 AR METHAZOLE 0.000343 AR DIMETHOATE 0.000301 AR DICROTOPHOS 0.000177 AR PROPICONAZOLE 0.000164 AR SETHOXYDIM 0.000153 AR FENOXAPROP ETHYL 0.000144 AR ETRIDIAZOLE 0.000110 AR CYPERMETHRIN 0.000056 AR LAMBDACYHALOTHRIN 0.000028 AR CHLORIMURON ETHYL 0.000016 AR BENSULFURON 0.000010 AR BENOMYL 0.000000 AR CYFLUTHRIN 0.000000 AR ESFENVALERATE 0.000000 AR PROPANIL 0.000000 AR MONOSODIUM METHANEARSONATE NA AR FLUOMETURON NA AR FOMESAFEN NA AR OXAMYL NA AR BROMACIL NA AR FLUAZIFOP-P-BUTYL NA AR QUIZALAFOP ETHYL NA AR DSMA NA AR MEPIQUAT NA AR NORFLURALIN NA 23 ------- Table 6. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides use in EPA Region VI by State.* (continued) STATE PESTICIDE NHRCB LA MOLINATE 0.009156 LA METOLACHLOR 0.006543 LA METHYL PARATHION 0.005354 LA TRIFLURALIN 0.004110 LA CYANAZINE 0.003702 LA PROMETRYN 0.002717 LA PENDIMETHALIN 0.002028 LA DIURON 0.001948 LA TERBUFOS 0.001898 LA PARAQUAT 0.001468 LA CLOMAZONE 0.001286 LA QUINTOZENE 0.001158 LA METRIBUZIN 0.001066 LA ETHEPHON 0.000972 LA CARBOFURAN 0.000925 LA THIOBENCARB 0.000876 LA BENTAZON 0.000810 LA METHAZOLE 0.000790 LA ACIFLUORFEN 0.000536 LA ALDICARB 0.000486 LA GLYPHOSATE 0.000426 LA ETRIDIAZOLE 0.000416 LA BENSULFURON 0.000361 LA DICROTOPHOS 0.000250 LA THIDIAZURON 0.000240 LA IMAZAQUIN ACID 0.000217 LA SETHOXYDIM 0.000177 LA FENOXAPROP ETHYL 0.000140 LA OXYFLUORFEN 0.000122 LA CYPERMETHRIN 0.000085 LA PROPICONAZOLE 0.000078 LA LAMBDACYHALOTHRIN 0.000047 LA PERMETHRIN 0.000034 LA CHLORIMURON ETHYL 0.000029 LA 2,4-D ACID 0.000000 LA BENOMYL 0.000000 LA CYFLUTHRIN 0.000000 LA PROPANIL 0.000000 LA MONOSODIUM METHANEARSONATE NA LA FLUOMETURON NA LA FOMESAFEN NA LA QUIZALAFOP ETHYL NA LA DSMA NA LA MEPIQUAT NA LA NORFLURALIN NA LA SODIUM CHLORATE NA OK 2,4-D ACID OK METHYL PARATHION OK DIMETHOATE OK CHLOROSULFURON 0.000920 0.000697 0.000647 0.000000 24 ------- Table 6. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides use in EPA Region VI by State.* (continued) STATE PESTICIDE NHRCB TX TRIFLURALIN 0.003964 TX ATRAZINE 0.002028 TX PROMETRYN 0.001131 TX METOLACHLOR 0.001073 TX PENDIMETHALIN 0.001010 TX ALACHLOR 0.000579 TX CHLOROTHALONIL 0.000413 TX AZINPHOS-METHYL 0.000413 TX ALDICARB 0.000365 TX DIURON 0.000346 TX METHYL PARATHION 0.000340 TX DICROTOPHOS 0.000332 TX CARBOFURAN 0.000209 TX CHLORTHAL DIMETHYL 0.000208 TX ACEPHATE 0.000134 TX DIMETHOATE 0.000121 TX SULPROFOS 0.000107 TX METHOMYL 0.000093 TX MANCOZEB 0.000090 TX DIAZINON 0.000090 TX CARBARYL 0.000082 TX ENDOSULFAN 0.000055 TX METALAXYL 0.000048 TX BENSULIDE 0.000035 TX DIETHATYL ETHYL 0.000025 TX ETRIDIAZOLE 0.000025 TX IPRODIONE 0.000021 TX CHLORPYRIFOS 0.000019 TX CAPTAN 0.000018 TX GLYPHOSATE 0.000010 TX PERMETHRIN 0.000009 TX LINURON 0.000007 TX CYCLOATE 0.000007 TX PHOSMET 0.000006 TX CYPERMETHRIN 0.000002 TX NAPROPAMIDE 0.000002 TX BIFENTHRIN 0.000001 TX OXYFLUORFEN 0.000000 TX PROPICONAZOLE 0.000000 TX BROMOXYNIL 0.000000 TX BENOMYL 0.000000 TX CYFLUTHRIN 0.000000 TX E S FENVALERATE 0.000000 TX ETHALFLURALIN 0.000000 TX MALATHION 0.000000 TX PETROLEUM OIL 0.000000 TX TRIOPHANATE METHYL 0.000000 TX MONOSODIUM METHANEARSONATE NA TX OXAMYL NA TX FLUOMETURON NA 25 ------- Table 6. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides use in EPA Region VI by State.* (continued) STATE PESTICIDE NHRCB TX METHAMIDOPHOS NA TX NAPTALAM NA TX CYROMAZINE NA TX TRALOMETHRIN NA TX LINDANE NA TX DISULFOTON NA TX PHOSALONE NA TX BENEFIN NA TX COPPER HYDROXIDE NA TX NICOSULFURON NA TX SULFUR NA TX TRIPHENYLTIN NA TX ZIRAM NA * State and chemical combinations not appearing in the table had no use reported. No use was reported for New Mexico. NA - values not available due to missing data required for calculations. 26 ------- Table 7. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin.* PESTICIDE NHRCM PESTICIDE NHRCM ARSENIC ACID .0018722 IMAZAQUIN ACID .0000038 GLYPHOSATE .0003229 THIDIAZURON .0000031 DICROTOPHOS .0002457 DIAZINON .0000031 ATRAZINE .0002270 AZINPHOS-METHYL .0000029 ALDICARB .0002007 CLOPYRALID .0000024 PROMETRYN .0001987 METALAXYL .0000021 DISULFOTON .0001787 FLUOMETURON .0000018 ACEPHATE .0001682 BROMOXYNIL .0000016 METOLACHLOR .0001674 BENSULIDE .0000013 BENTAZON .0001586 IPRODIONE .0000013 ALACHLOR .0001210 SULPROFOS .0000011 DIMETHOATE .0001158 TRICLOPYR .0000008 MONOSODIUM METHANEARSONATE .0001084 METSULFURON-METHYL .0000007 ETHEPHON .0000990 VERNOLATE .0000005 CARBARYL .0000852 ENDOTHALL .0000003 METHYL PARATHION .0000791 MEVINPHOS .0000003 TERBUFOS .0000737 CHLORTHAL DIMETHYL .0000003 MOLINATE .0000708 BIFENTHRIN .0000002 PARAQUAT .0000707 ENDOSULFAN .0000001 CARBOFURAN .0000668 PHOSMET .0000001 METHOMYL .0000596 METRIBUZIN .0000000 FOMESAFEN .0000534 CAPTAN .0000000 PARATHION .0000503 PERMETHRIN .0000000 FLUAZIFOP-P-BUTYL .0000480 BENOMYL .0000000 SETHOXYDIM .0000397 CHLOROTHALONIL .0000000 ACIFLUORFEN .0000383 CYFLUTHRIN .0000000 THIOBENCARB .0000307 CYPERMETHRIN .0000000 MONOCROTOPHOS .0000239 DICLOFOP-METHYL .0000000 THIODICARB .0000230 ESFENVALERATE .0000000 DIURON .0000180 MALATHION .0000000 PROPICONAZOLE .0000167 ORYZALIN .0000000 OXYDEMETON-METHYL .0000164 PETROLEUM OIL .0000000 MANCOZEB .0000164 PROPANIL .0000000 CYANAZINE .0000149 TRIFLURALIN .0000000 PROFENOFOS .0000146 2,4-D ACID NA CHLORSULFURON .0000145 BUTIFOS NA PENDIMETHALIN .0000144 COPPER HYDROXIDE NA CHLORPYRIFOS .0000122 CYHALOTHRIN NA PROPARGITE .0000119 DICAMBA NA TRIADIMEFON .0000119 DSMA NA PHOSPHAMIDON .0000116 FENVALERATE NA 2,4-DB .0000097 FURORE NA QUINTOZENE .0000063 MEPIQUAT NA PHOSALONE .0000055 TRIPHENYLTIN NA LINURON .0000052 * NA - values were not available due to missing data required for calculations. Picloram and 2,4-D combinations for hay and pasture application were not included because rates were dependent on brush intensity rather than per acre. Pesticides not included in the table had no use reported. 27 ------- Table 8. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin.* PESTICIDE NHRCB PESTICIDE NHRCB ARSENIC ACID .0046346 CYPERMETHRIN .0000069 ATRAZINE .0017831 IMAZAQUIN ACID .0000060 PROMETRYN .0015023 CHLORTHAL DIMETHYL .0000055 TERBUFOS .0008611 METALAXYL .0000054 METOLACHLOR .0007267 BIFENTHRIN .0000030 ALACHLOR .0006405 METSULFURON-METHYL .0000022 ALDICARB .0005994 ENDOSULFAN .0000016 CARBARYL .0005656 ENDOTHALL .0000006 METHYL PARATHION .0005439 PHOSMET .0000005 PARATHION .0004048 MEVINPHOS .0000004 GLYPHOSATE .0003895 CAPTAN .0000002 CARBOFURAN .0003366 METRIBUZIN .0000001 MOLINATE .0002804 PERMETHRIN .0000001 DICROTOPHOS .0002729 BENOMYL .0000000 PENDIMETHALIN .0002484 CHLOROTHALONIL .0000000 THIOBENCARB .0002403 CYFLUTHRIN .0000000 DIMETHOATE .0002362 DICLOFOP-METHYL .0000000 THIODICARB .0002202 ESFENVALERATE .0000000 PROPARGITE .0002053 MALATHION .0000000 CHLORPYRIFOS .0002049 PETROLEUM OIL .0000000 ACEPHATE .0001964 PROPANIL .0000000 MANCOZEB .0001907 TRIFLURALIN .0000000 DIURON .0001338 2,4-D ACID NA PROFENOFOS .0001302 2,4-DB NA BENTAZON .0001263 BUTIFOS NA SETHOXYDIM .0001222 CLOPYRALID NA METHOMYL .0001151 COPPER HYDROXIDE NA PROPICONAZOLE .0001132 CYHALOTHRIN NA ETHEPHON .0001039 DICAMBA NA QUINTOZENE .0001029 DISULFOTON NA CYANAZINE .0000919 DSMA NA PARAQUAT .0000852 FENVALERATE NA ACIFLUORFEN .0000542 FLUAZIFOP-P-BUTYL NA BROMOXYNIL .0000475 FLUOMETURON NA CHLORSULFURON .0000429 FOMESAFEN NA LINURON .0000353 FURORE NA THIDIAZURON .0000285 MEPIQUAT NA MONOCROTOPHOS .0000263 MONOSODIUM METHANEARSONATE NA AZINPHOS-METHYL .0000235 ORYZALIN NA DIAZINON .0000210 PHOSALONE NA SULPROFOS .0000201 TRIADIMEFON NA OXYDEMETON-METHYL .0000155 TRICLOPYR NA BENSULIDE .0000136 TRIPHENYLTIN NA PHOSPHAMIDON .0000124 VERNOLATE NA IPRODIONE .0000118 * NA - values were not available due to missing data required for calculations. Picloram and 2,4-D combinations for hay and pasture application were not included because rates were dependent on brush intensity rather than per acre. Pesticides not included in the table had no use reported. 28 ------- DISCUSSION Thirty compounds were selected for this discussion. These compounds include the top twenty ranked by NHRCM and NHRCB in the Trinity River Basin plus most of the top ten ranked by NHRCM and NHRCB in each state for Arkansas, Louisiana and Texas. Reported pesticide use from Oklahoma and New Mexico were much less than in these three states and thus pesticides used in Oklahoma and New Mexico were not selected for this discussion. Pesticides not included in this list that were ranked in the top ten for NHRCM were oxamyl in Texas, and for NHRCB were diuron in Lousiana, chlorothalonil, azinphos-methyl and diuron in Texas. This summary by product consists of product name, common trade name(s), ranks of hazard ratings calculated in this study, statement of product uses and a few comments about specific products. Pait et al. (1992) ranked most of the same agricultural pesticides as hazardous as does this study. Herbicides were generally highly ranked in both studies. Several of the commonly used herbicides such as alachlor, atrazine and metolachlor are not as frequently found in aquatic biota as expected based on their use (Pait et al. 1992). While hazard rating methods like those utilized in this report provide general guidance on relative hazard from pesticide, more specific information on pesticide fate is always desirable. Environmental and biological monitoring studies provide specific point estimates of pesticide concentrations in various segments of the environment. Simulation models provide a method of predicting pesticide breakdown and movement in the environment. HERBICIDES Acifluorfen is a postemergence herbicide for annual broadleaf weeds on soybeans, peanuts and rice (Farm Chemicals Handbook 1992). It is commonly sold as Blazer™. The HRCM for acifluorfen ranked 19th of the chemicals in this study. The NHRCM for acifluorfen ranked 6th in AR, 11th in LA, and 26th in the TRB. The HRCB for aciflurofen ranked 38th of the chemicals in this study. The 29 ------- NHRCB for acifluorfen ranked 11th in AR, 19th in LA and 33rd in the TRB. Moderate use and moderate toxicity contribute to its rankings. Alachlor is a preemergence, early postemergence or soil-incorporated herbicide used to control most annual grasses and many broadleaf weeds in beans, corn, cotton, milo, peanuts, peas, soybeans, sunflower, and certain woody ornamental plants (Montgomery 1993). It is commonly sold as Lasso™. The HRCM for alachlor ranked 44th of the chemicals in this study. The NHRCM for alachlor ranked 12th in AR, 10th in TX, and 11th in the TRB. The HRCB for alachlor ranked 44th of the chemicals in this study. The NHRCB for alachlor ranked 7th in AR, 6th in TX and 6th in the TRB. Widespread use contributes to values of normalized rankings above hazard ranks. Atrazine is used for season long weed control in corn, sorghum and certain other crops (Farm Chemicals Handbook 1992). It is commonly sold as Aatrex™ and under many other names. The HRCM for atrazine ranked 54th of the chemicals in this study. The NHRCM for atrazine ranked 4th in TX and 4th in the TRB. The HRCB for atrazine ranked 19th of the chemicals in this study. The NHRCB for atrazine ranked 2nd in TX and 2nd in the TRB. This chemical is already recognized as a hazard appearing in surface water in the midwest. Bentazon is a selective postemergence control of many broadleaf weeds and sedges in corn, rice, sorghum, soybeans, alfalfa and many other crops (Farm Chemicals Handbook 1992). It is commonly sold as Basagran™. The HRCM for bentazon ranked 4th of the chemicals in this study. The NHRCM for bentazon ranked 3rd in AR, 5th in LA, and 10th in the TRB. The HRCB for bentazon ranked 46th of the chemicals in this study. The NHRCB for bentazon ranked 9th in AR, 17th in LA and 25th in the TRB. Cyanazine is used for early preplant, preemergence or postemergence for field corn, weed control on fallow cropland (Farm Chemicals Handbook 1992). The HRCM for cyanazine ranked 49th of the chemicals in this study. The NHRCM for cyanazine ranked 10th in AR, 10th in LA, and 34th in the TRB. The HRCB for cyanazine ranked 33rd of the chemicals in this study. The NHRCB for cyanazine ranked 6th in AR, 5th in LA and 31st in the TRB. Substantial use was reported 30 ------- in AR and LA. Reported use was much less in TX and the TRB. Fluometuron is used as a pre-emergence and post-emergence herbicide used for weed control in cotton (Farm Chemicals Handbook 1992). It is commonly sold as Cotoran™. The HRCM for fluometuron ranked 51st of the chemicals in this study. The NHRCM for fluometuron ranked 8th in AR, 9th in LA, 17th in TX and 52nd in the TRB. Glyphosate is a nonselective, postemergence herbicide for control of many annual and perennial grasses and broadleaf weeds and tree and woody brush species in cropland and non-crop sites (Farm Chemicals Handbook 1992). It is commonly sold as Roundup™. The HRCM for glyphosate ranked 6th of the chemicals in this study. The NHRCM for glyphosate ranked 13rd in AR, 13rd in LA, 24th in TX and 2nd in the TRB. The HRCB for glyphosate ranked 12th of the chemicals in this study. The NHRCB for glyphosate ranked 20th in AR, 21st in LA, 30th in TX and 11 in the TRB. Rangeland and right-of-way brush control were a major use. Metolachlor is a preemergence and preplant incorporated weed control in corn, soybeans, peanuts, grain sorghum, cotton and other crops (Farm Chemicals Handbook 1992). The HRCM for metolachlor ranked 32nd of the chemicals in this study. The NHRCM for metolachlor ranked. 7th in AR, 3rd in LA, 5th in TX and 9th in the TRB. The HRCB for metolachlor ranked 10th of the chemicals in this study. The NHRCB for metolachlor ranked 5th in AR, 2nd in LA, 4th in TX and 5th in the TRB. Molinate is used to control watergrass in rice (Farm Chemicals Handbook 1992). The HRCM for molinate ranked 36th of the chemicals in this study. The NHRCM for molinate ranked 2nd in AR, 2nd in LA, and 18th in the TRB. The HRCB for molinate ranked 35th of the chemicals in this study. The NHRCB for molinate ranked 1st in AR, 1st in LA and 13 in the TRB. Ranking reflects the use in rice. Monosodium methanearsonate is used as a postemergence herbicide for johnsongrass and other grassy weeds in noncrop land. Preplant herbicide in cotton (Farm Chemicals Handbook 1992). It is frequently abbreviated as MSMA. The HRCM for monosodium methanearsonate ranked 1st of the chemicals in this study. The NHRCM for monosodium methanearsonate ranked 1st in AR, 1st in LA, 2nd 31 ------- in TX and 13rd in the TRB. High solubility contributes to high ranking. Pendimethalin is used as a preemergence or postemergence herbicide in field corn; early postemergence in rice; postemergence incorporated in sorghum; preplant incorporated in cotton, soybeans, peanuts, and others (Farm Chemicals Handbook 1992). It is commonly sold as Prowl™. The HRCM for pendimethalin ranked 75th of the chemicals in this study. The NHRCM for pendimethalin ranked 17th in AR, 23rd in LA, 12th in TX and 37th in the TRB. The HRCB for pendimethalin ranked 25th of the chemicals in this study. The NHRCB for pendimethalin ranked 3rd in AR, 7th in LA, 5th in TX and 15th in the TRB. Prometryn is a selective herbicide for most annual grasses, broadleaf weeds in cotton (Farm Chemicals Handbook 1992). The HRCM for prometryn ranked 55th of the chemicals in this study. The NHRCM for prometryn ranked 25th in AR, 12th in LA, 6th in TX and 6th in the TRB. The HRCB for prometryn ranked 28th of the chemicals in this study. The NHRCB for prometryn ranked 12th in AR, 6th in LA, 3rd in TX and 3rd in the TRB. Thiobencarb is a preemergence and early postemergence herbicide used in rice (Farm Chemicals Handbook 1992). It is commonly sold as Bolero™. The HRCM for thiobencarb ranked 61st of the chemicals in this study. The NHRCM for thiobencarb ranked 9th in AR, 24th in LA, and 27th in the TRB. The HRCB for thiobencarb ranked 41st of the chemicals in this study. The NHRCB for thiobencarb ranked 4th in AR, 16th in LA and 16th in the TRB. Trifluralin is used as a selective preemergence herbicide on many crops (Farm Chemicals Handbook 1992). It is commonly sold as Treflan™. The HRCM for trifluralin ranked 104th of the chemicals in this study. The NHRCM for trifluralin ranked 5th in AR, 8th in LA, 1st in TX and 79th in the TRB. The HRCB for trifluralin ranked 83rd of the chemicals in this study. The NHRCB for trifluralin ranked 2nd in AR, 4th in LA, 1st in TX and 67th in the TRB. Trifluralin has widespread use in AR, LA, and TX but much reduced use in the TRB by comparison. 32 ------- PLANT GROWTH REGULATORS AND DESICCANTS Arsenic acid is a cotton desiccant and herbicide (Farm Chemicals Handbook 1992). The HRCM for arsenic acid ranked 3rd of the chemicals in this study. The NHRCM for arsenic acid ranked 1st in the TRB. The HRCB for arsenic acid ranked 1st of the chemicals in this study. The NHRCB for arsenic acid ranked 1st in the TRB. Very long half life contributes to this product rating. The use in states was not reported probably because the USDA report concentrated on pesticides and may have excluded it as a harvest aid chemical. Ethephon is a plant growth regulator for cotton, various fruits, nuts and vegetables (Farm Chemicals Handbook 1992). The HRCM for ethephon ranked 13rd of the chemicals in this study. The NHRCM for ethephon ranked 4th in AR, 6th in LA, and 14th in the TRB. The HRCB for ethephon ranked 58th of the chemicals in this study. The NHRCB for ethephon ranked 10th in AR, 14th in LA and 29th in the TRB. Paraquat is used for desiccation of seed crops, noncrop and industrial weed control; defoliation and desiccation of cotton, used in "NoTill" before planting (Farm Chemicals Handbook 1992). The HRCM for paraquat ranked 2nd of the chemicals in this study. The NHRCM for paraquat ranked 4th in LA, and 19th in the TRB. The HRCB for paraquat ranked 2nd of the chemicals in this study. The NHRCB for paraquat ranked 10th in LA and 32rd in the TRB. INSECTICIDES AND ACARICIDES Acephate is a contact and systemic insecticide for control of sucking and chewing insects in cotton, ornamentals, forestry, tobacco, fruits, vegetables, and other crops (Montgomery 1993). It is commonly sold as Orthene™. The HRCM for acephate ranked 21st of the chemicals in this study. The NHRCM for acephate ranked 9th in TX and 8th in the TRB. The HRCB for acephate ranked 68th of the chemicals in this study. The NHRCB for acephate ranked 15th in TX and 21st in the TRB. The NHRCM and NHRCB for acephate is elevated in rank above the HRCM and HRCB indicating substantial use. Aldicarb is a systemic insecticide, acaracide and nematicide (Montgomery 1993). It is commonly sold as Temik™. The HRCM for aldicarb ranked 28th of the 33 ------- chemicals in this study. The NHRCM for aldicarb ranked 16th in AR, 20th in LA, 8th in TX and 5th in the TRB. The HRCB for aldicarb ranked 21st of the chemicals in this study. The NHRCB for aldicarb ranked 13rd in AR, 20th in LA, 9th in TX and 7th in the TRB. Relatively high rankings of HRCM and HRCB coupled with substantial use contribute to the rankings for NHRCM and NHRCB. Carbaryl is a broad spectrum insecticide used for chewing insects on many crops (Farm Chemicals Handbook 1992). It is commonly sold as Sevin™. The HRCM for carbaryl ranked 56th of the chemicals in this study. The NHRCM for carbaryl ranked 22nd in TX and 15th in the TRB. The HRCB for carbaryl ranked 42nd of the chemicals in this study. The NHRCB for carbaryl ranked 21st in TX and 8th in the TRB. The rankings for HRCM and HRCB are relatively low. This product is generally considered a low toxicity alternative to more hazardous compounds. However, carbaryl is used at high rates per acre compared with some of the more recently registered compounds. Carbofuran is a broad spectrum insecticide, nematicide and miticide on a variety of crops (Farm Chemicals Handbook 1992). It is commonly sold as Furadan™. The HRCM for carbofuran ranked 37th of the chemicals in this study. The NHRCM for carbofuran ranked 19th in LA, 18th in TX and 20th in the TRB. The HRCB for carbofuran ranked 14th of the chemicals in this study. The NHRCB for carbofuran ranked 15th in LA, 13rd in TX and 12th in the TRB. Chlorpyrifos is used to control a wide variety of insects in many agricultural and urban situations. It is commonly sold as Lorsban™ for agricultural use and Dursban™ for homeowner use. The HRCM for chlorpyrifos ranked 82nd of the chemicals in this study. The NHRCM for chlorpyrifos ranked 28th in TX and 38th in the TRB. The HRCB for chlorpyrifos ranked 40th of the chemicals in this study. The NHRCB for chlorpyrifos ranked 28th in TX and 20th in the TRB. While the HRCM and HRCB are relatively low, this product is used at relatively high rates per acre which contribute to its ranking. Dicrotophos is a contact systemic insecticide for cotton insects (Farm Chemicals Handbook 1992). The HRCM for dicrotophos ranked 8th of the chemicals in this study. The NHRCM for dicrotophos ranked 23rd in AR, 18th in LA, 3rd in 34 ------- TX and 3rd in the TRB. The HRCB for dicrotophos ranked 27th of the chemicals in this study. The NHRCB for dicrotophos ranked 26th in AR, 24th in LA, 12th in TX and 24th in the TRB. Ratings in TX and TRB are probably due to more cotton acreage in these areas compared to AR and LA. Dimethoate is a systematic insecticide/acaracide used on many crops (Farm Chemicals Handbook 1992). It is commonly sold as Cygon™. The HRCM for dimethoate ranked 27th of the chemicals in this study. The NHRCM for dimethoate ranked 24th in AR, 1st in OK, 11th in TX and 12th in the TRB. The HRCB for dimethoate ranked 59th of the chemicals in this study. The NHRCB for dimethoate ranked 25th in AR, 3rd in OK, 16th in TX and 17th in the TRB. One of only four products reported from OK. Used on a variety of crops but cotton use probably dominates these rankings. Disulfoton is used as a side dressing, broadcast, in the seed furrow or foliar spray to control many insects and mites and as a seed treatment for sucking insects (Farm Chemicals Handbook 1992). The HRCM for disulfoton ranked 59th of the chemicals in this study. The NHRCM for disulfoton ranked 44th in TX and 7th in the TRB. Methyl parathion is an insecticide used to control boll weevil, many biting and sucking insects in many crops (Farm Chemicals Handbook 1992). The HRCM for methyl parathion ranked 65th of the chemicals in this study. The NHRCM for methyl parathion ranked 26th in AR, 7th in LA, 3rd in OK, 14th in TX and 16th in the TRB. The HRCB for methyl parathion ranked 65th of the chemicals in this study. The NHRCB for methyl parathion ranked 17th in AR, 3rd in LA, 2nd in OK, 11th in TX and 9th in the TRB. Parathion is an insecticide and acaracide for control of sucking and chewing insects and mites in fruit, vegetables, ornamentals and field crops (Montgomery 1993). The HRCM for parathion ranked 63rd of the chemicals in this study. The NHRCM for parathion ranked 23rd in the TRB. The HRCB for parathion ranked 49th of the chemicals in this study. The NHRCB for parathion ranked 10th in the TRB. Many uses were cancelled on 12/31/91 (Farm Chemicals Handbook 1992). Propagite is an acaricide used in corn, cotton, sorghum and many other 35 ------- crops (Farm Chemicals Handbook 1992). The HRCM for propargite ranked 74th of the chemicals in this study. The NHRCM for propargite ranked 39th in the TRB. The HRCB for propargite ranked 22nd of the chemicals in this study. The NHRCB for propargite ranked 19th in the TRB. Terbufos is a systemic insecticide used for corn rootworms and others pests in corn and greenbug on grain sorghum (Farm Chemicals Handbook 1992). It is commonly sold as Counter™. The HRCM for terbufos ranked 76th of the chemicals in this study. The NHRCM for terbufos ranked 21st in AR, 21st in LA, and 17th in the TRB. The HRCB for terbufos ranked 63rd of the chemicals in this study. The NHRCB for terbufos ranked 8th in AR, 9th in LA and 4th in the TRB. Thiodicarb is an insecticide primarily for Lepidopterous pests and used as an ovicide in cotton (Farm Chemicals Handbook 1992). It is commonly sold as Larvin™. The HRCM for thiodicarb ranked 70th of the chemicals in this study. The NHRCM for thiodicarb ranked 28th in the TRB. The HRCB for thiodicarb ranked 55th of the chemicals in this study. The NHRCB for thiodicarb ranked 18th in the TRB. ENVIRONMENTAL AND BIOLOGICAL MONITORING STUDIES The Upper Trinity was a focus for a recent symposium (Jensen 1992) which included information and reviews on pesticides in the Trinity River. Since 1970, there have been fifteen documented fish kills in the Trinity, most of these in the middle reaches (Dickson et al. 1992). An ongoing, comprehensive study on fish kills in the Trinity River has been underway (Davis 1987, 1991; Davis and Bastian 1988, 1990). The conclusion from these studies was that most of the fish kills were associated with low levels of dissolved oxygen. However, the cumulative information revealed that toxicants were exerting appreciable ecological impacts on aquatic life in the system. Severe toxicity to Ceriodaphnia was observed in an ambient toxicity test of water collected at Trinidad during high water flows. Diazinon was identified as a probable toxic agent in this situation (Davis and Bastian 1990). A subsequent study (Crocker et al. 1992) detected diazinon at 18 of 20 ambient 36 ------- river stations tested. However, diazinon concentrations did not exceed the chronic value (0.34 ug/1) for Ceriodaphnia. The time of the samples and antecedent rainfall may have resulted in underestimation of typical diazinon concentrations. The assessment of biotic integrity of the Trinity River (Davis 1991) found that the aquatic communities were typically healthy with the degree of integrity remarkable for such an extensively urbanized watershed. However, a degree of impact was evident in certain reaches of the river. Generally, these studies conclude that the water quality in the Trinity River has substantially improved since the 1970's but that some disruption of biological integrity still occurs. The Texas Water Commission (1990) provides a physical description of the Trinity River Basin and a summary of the water quality in that river. TWC points out that levels of dissolved oxygen, fecal coliform bacteria, nutrients, cadmium and lead were all of concern. The main concern related to pesticides was the fishing ban for that portion of the river from Fort Worth to Highway 1-20 due to chlordane contamination. Pesticide use in the Upper Trinity River was summarized by Harris et al. (1992) who point out that the agricultural production in this area was declining and that increased numbers of soil samples from that area indicate that improved crop practices were being followed. The voluntary adoption of best management practices and the widespread use of integrated pest management have contributed to this improvement in agricultural practices. These changes in production practices has further helped to reduce the impact of pesticides on the Trinity River which is encouraging for improvements in the river in the future. Irwin (1988) and Dickson et al. (1992) reported on monitoring of fish tissue samples for chlorinated hydrocarbons and heavy metals in the Trinity River Basin. Levels of chorinated hydrocarbons and heavy metals were found to be elevated in areas of the river below residential centers. However, the levels of these chemicals in most areas were low enough to not be a major concern. The compounds investigated in monitoring studies were not the compounds that ranked high in this study with the exception of arsenic. Nevertheless, most Trinity 37 ------- River tissue samples do not show highly elevated levels of arsenic (Irwin 1988). Plots and statistical analyses of arsenic levels in mosquitofish revealed no clear trends or correlations when compared to river miles, location groups or runoff types. Irwin (1988) suggests that more data is needed to assess risks of arsenic to fish and wildlife and that some clam species may be better for monitoring arsenic than fish tissue samples. COMPARISON OF URBAN PESTICIDE HAZARD TO AGRICULTURAL HAZARD Irwin (1988) pointed out that areas of the Trinity River downstream from Dallas/Fort Worth had a reduced number of species of fish and wildlife. Many of the species present were found to carry sufficiently high body burdens of toxic chemicals to cause concern for their welfare. Consequently, an evaluation of the potential for pesticide impact from urban areas compared to agriculture was attempted here for example pesticides. A recent national survey of urban pesticide use (Whitmore et al. 1992) was conducted providing an estimate of pounds of pesticide applied by household nationally. Dallas County, the most populous county along the Trinity River, has an estimated 701,686 households (Texas State Data Center, personal communica- tion) . Multiplying use by households in Dallas County provides an estimated urban pesticide use of 534,196 pounds per year in a county consisting of 563,200 acres (Dallas Morning News 1987). Even though urban pesticide use estimates were not partitioned by pesticide, a hypothetical calculation was completed to estimate the percentage of urban pesticide use that would be necessary for diazinon, a commonly used urban insecticide, to be considered as hazardous as any agricultural pesticide in this study. Diazinon with a HRCM of .039365 and a HRCB of .27015 would have to constitute only about 5% and 2% of the total urban pesticide use in Dallas County to have a NHRCM and NHRCB, respectively, to be as significant in Dallas County as arsenic acid with NHRCM of .0018722 and NHRCB of .0046346 in the Trinity River Basin. Similarly, chlorpyrifos would have to constitute 13% and 2% of the total 38 ------- urban pesticide use in Dallas County to have a NHRCM and NHRCB, respectively, to be as significant as any agricultural pesticide in the Trinity River Basin. These percentages seem well within reason for these commonly used insecticides. Consequently, urban pesticide use could easily be a hazard in highly urbanized counties that rivals agricultural pesticide hazard for individual chemicals. SIMULATION MODELS AND GEOGRAPHIC INFORMATION SYSTEMS Simulation models are useful tool to predict the impact of pesticides. While exact values for output parameters are sometimes incorrect, the use of models for sensitivity analysis (Srinivasan and Engel 1992) and priority setting (Haith 1985, 1987) is justified because relative values can be used for comparison between pesticides. A number of simulation models have been developed that could be used for evaluation of pesticide contamination and these models vary in complexity and purpose. Griggs (1990) provided a review of various models for use in water quality evaluations including estimating pesticide contamination in run-off. Jones (1993) provides a further summary of modeling efforts that include water quality considerations. Selection of a model that is appropriate for a particular study may be difficult. Often an existing model can be modified to accommodate a new application. The rapid increase in geographic information systems (GIS) capabilities, availability of appropriate data, computer speed and data storage has made many GIS applications feasible that might have been overlooked a few years ago. Specific applications for pesticide use and fate modeling with GIS links have not been completed for the Trinity River Basin. However, models like AGNPS have been successfully linked to a GIS (Lee and Terstriep 1991, Vieux and Needham 1993) for sediment movement in the soil. Horn and Grayman (1993) discuss the use of the EPA REACH file system which was based on USGS maps of hydrology for water quality modeling. Furthermore, GIS applications have been developed to identify sites for stormwater detention basins along the Trinity River (Atkinson 1992) which could be an important start toward that goal. Progress in these studies provides 39 ------- a framework which should expedite GIS applications to study pesticides in surface water in the near future. This project was undertaken with the expectation that pesticides use and fate studies will eventually use this technology. The data used in this study have been placed in a format compatible with GIS. (Examples of GIS generated maps are in Appendix M). Our data could be easily incorporated into more complex GIS applications. Incorporation of hazard rating methods with environmental fate models of pesticides into a database linked to a GIS is a long-term goal which would allow more realistic site-specific pesticide hazard rating. This project was intended as contributing toward that goal. The two tables below show pesticides ranking in the top ten either in NHRCM or NHRCB based on agricultural use. The first shows 23 in either Arkansas, Louisiana or Texas. Pesticide use and reporting from Oklahoma and New Mexico were much less than in these three states and thus were not selected for this summary. The second table shows 16 pesticides in the Trinity River Basin. CONCLUSIONS Top ranking pesticides on either NHRCM or NHRCB scale in either Arkansas. Louisiana or Texas. acephate acifluorfen metolachlor molinate monosodium methanearsonate oxamyl paraquat parathion (methyl) pendimethalin prometryn terbufos thiobencarb trifluralin alachlor aldicarb azinphos-methyl bentazon chlorothalonil cyanazine dicrotophos diuron ethephon fluometuron Top ranking pesticides on either NHRCM or NHRCB scale in the Trinity River Basin of Texas. acephate alachlor aldicarb diuron ethephon fluometuron metolachlor parathion (ethyl) parathion (methyl) prometryn terbufos arsenic acid atrazine bentazon carbaryl dicrotophos 40 ------- More than half of the chemicals that had high normalized hazard ratings were herbicides. While herbicides have rarely produced fish kills, the risk to aquatic plants posed by herbicide runoff should be considered. Several insecticides also had high hazard ratings. We developed the hazard rating coefficients using three critieria. These were total pesticides applied, land area impacted, and chemical characteristics. Total pesticide applied was a dominant factor in hazard rating. In this study, pesticide hazard was local for some products applied in the Trinity River Basin. This was especially so for products used primarily on single crops grown regionally. An example is rice along the Gulf Coast. Urban pesticide use can present serious environmental hazards. Calcula- tions of hazard ratings from pesticides applied in urban areas suggest that their impact may be as significant as hazards from agricultural chemicals. Pesticides like diazinon and chlordane are known problem chemicals in the Trinity River but were not rated high based on agricultural use. The source of these pesticides is more likely to be urban use. 41 ------- ACKNOWLEDGEMENTS I thank Philip Crocker and his colleagues at EPA Region VI for their review of early versions of this manuscript. I also thank Douglas Stevenson, Marvin Harris, Paul Baumann, Rodney Holloway and Ric Jensen for their review of the manuscript and helpful suggestions. I thank the Interlibrary Services office of the the Sterling C. Evans Library at Texas ASM for their assistance in acquisiton of various documents used in this study. A number of contacts in various agencies including the Texas Water Commission, the Texas Water Resources Institute, the Texas Water Development Board, the Texas Parks and Wildlife Department, the chemical industry, and others have contributed information for this report. 42 ------- LITERATURE CITED Atkinson, S. F. 1992. Using Geographic Information Systems to Locate Sites for Stormwater Detention Basins. In Jensen, R. 1992. How Healthy is the Upper Trinity River? Biological and Water Quality Perspectives. Proceedings of a Symposium Hosted by Texas Christian University, Oct. 1991. 274 pp. AQUIRE. 1993. On-line data base. US-Environmental Protection Agency. Buckner, H. D., and W. J. Shelby. 1990. Water Resouces Data Texas Water Year 1990. Vol. 1. 453 pp. U. S. Geological Survey Water - Data Report TX-90-1. USGS, Austin, TX. Crocker, P. A., J. R. Davis, T. A. Hollister and E. Hornig. 1992. Diazinon in Municipal Effluents and Ambient Waters for the Upper Trinity River, Texas. U. S. EPA-Region 6, Dallas, Texas and Texas Water Commission, Austin, Texas. Crop Protection Chemicals Reference. 1991. Chemical and Pharmaceutical Press, Paris. 7th Edition. 2170 pp. + Supplement 55 pp. EXTOXNET. 1989. Extension Toxicology Network. A Pesticide Information Project of the Cooperative Extension Offices of Cornell University, The University of California, Michigan State University and Oregon State University. Cornell University, Ithaca, N.Y. Dallas Morning News. 1987. 1988-1989 Texas Almanac and State Industrial Guide. The Texas Monthly Press. 640 pp. Davis, J. R. 1987. Analysis of fish kills and associated water quality conditions in the Trinity River, Texas. I. Review of historical data, 1970-1985. Texas Water Commission Report No. LP-87-02. Austin, TX. Davis, J. R. 1991. Analysis of Fish Kills and Associated Water Quality Conditions in the Trinity River, Texas, IV. Assessment of Biotic Integrity. TX Water Commission LP 91-03, 169 pp. Davis, J. R., and M. V. Bastian. 1988. Analysis of fish kills and associated water quality conditions in the Trinity River, Texas. II. Results of Phase I Studies, 1985-86. Report Number LP 88-06, Texas Water Commission, Austin, Texas. 199 p. Davis, J. R., and M. V. Bastian. 1990. Analysis of fish kills and associated water quality conditions in the Trinity River, Texas. III. Final Toxicological Considerations, Rept. NO. LP 90-03, Texas Water Commission, Austin, Texas. 81 p. Dickson, K. L., W. T. Waller, J. H. Kennedy, R. W. Arnold and J. F. Hall. 1992. A water quality and ecological survey of the Trinity River. In Jensen, R. 1992. How Healthy is the Upper Trinity River? Biological and Water Quality Perspec- tives. . Proceedings of a Symposium Hosted by Texas Christian University, Oct. 1991. 274 pp. EPA. 1990a. Region 6 Comparative Risk Project Overview Report. 175 pp. Appendices. EPA. 1990b. Region 6 Comparative Risk Project. Appendix A: Ecological Report. EPA. 1991. The Watershed Protection Approach, An Overview. US-EPA. Office of Water. EPA/503/9-92/002. 8 pp. Farm Chemicals Handbook. 1992. Meister Publishing Company, Willoughby, OH. 794 pp. 43 ------- Gianessi, L. P., and C. A. Puffer. 1990. The Use of Herbicides in U. S. Crop Production; Use Coefficients Listed by State. Quality of Environment Division, Resources for the Future, Inc. Vol. 1, 120 pp. Griggs, R. H. 1990. The Right Computer Simulation Model for the Right Water Quality Question. In Proceedings 26th Annual Meeting of the Texas Section American Society of Agricultural Engineers. . Paper No. TX90-5. Haith, D. A. 1985. Variability of pesticide loads to surface waters. J. WPCF 57(11): 1062-1067. Haith, D. A. 1987. Extreme event analysis of pesticide loads to surface waters. J. WPCF 59(5): 284-288. Harris, B. L., R. L. Holloway, and H. D. Pennington. 1992. Pesticide and Fertilizer Use in the Upper Trinity River Watershed. In Jensen, R. 1992. How Healthy is the Upper Trinity River? Biological and Water Quality Perspectives. Proceedings of a Symposium Hosted by Texas Christian University, Oct. 1991. 274 pp. Holloway, R. L., B. L. Boyd, J. D. Price, and F. Mazac, Jr. 1990. Estimates of Agriculture Chemical use in Texas reported by hydrologic unit. Texas Agricultural Extension Service. 213 pp. Horn, C. R., and W. M. Grayman. 1993. Water-quality modeling with EPA Reach File System. J. of Water Resources Planning and Management. 119(2): 262-274. Humenik, F. J., S. Ainsworth, R. R. Carriker, J. A. Cotruvo, G. J. Hoffman, L. W. Libby, M. Mlay, R. Parry, R. F. Poltak, M. B. Reeves, M. B. St. Clair, J. Thorne, and M. Yates. 1992. Water Quality: Agriculture' Role. Council for Agr. Sci. and Tech. Task Force Report No. 120. Ames, IA. 103 pp. Irwin, R. J. 1988. Impacts of Toxic Chemicals on Trinity River Fish and Wildlife. Fish and Wildlife, US Dept. of the Interior. 82 pp. Jensen, R. 1992. How Healthy is the Upper Trinity River? Biological and Water Quality Perspectives. Proceedings of a Symposium Hosted by Texas Christian University, Oct. 1991. 274 pp. Jones, C. A. 1993. Agricultural and Natural Resources Policy Analysis, CNRIT Newsl Center for Natural Resources Information Technology, TX. Agr. Exp. Sta., Temple, TX 2(1): 1-16. Lee, M. T., and M. L. Terstriep. 1991. Application of GIS for water quality modeling in agricultural and urban watershed. Hydr. Engrg., Proc., 1991 Nat. Conf. ASCE, New York, NY. 961-965. Montgomery, J. H. 1993. Agrochemical Desk Reference. Lewis Publishers, Chelsea, Michigan. 625 pp. Pait, A. S., A. E. DeSouza, D. R. G. Farrow. 1992. Agricultural Pesticide Use in Coastal Areas: A National Summary. National Oceanic and Atmospheric Administration, U. S. Dept. of Commerce, 112 pp. Royal Society of Chemistry. 1991. The Agrochemical Handbook 3rd edition. The Royal Society of Chemistry: Information Services. Thomas Graham House, Science Park, Milton Road, Cambridge CB4 4WF England. Savage, E. P., T. J. Keefe, and H. W. Wheeler. 1980. National Household Pesticide Usage Study, 1976-1977. US EPA, Office of Pesticide Programs, EPA 540/9-80-002. 126 pp. 44 ------- Shelton, B. 1992. New Water Quality and Environmental Initiatives for the U. S. Army Corps of Engineers in the Upper Trinity River Basin. In Jensen, R. 1992. How Healthy is the Upper Trinity River? Biological and Water Quality Perspectives. Proceedings of a Symposium Hosted by Texas Christian University, Oct. 1991. 274 pp. Srinivasan, R., and B. A. Engel. 1992. GIS: A Tool for Sensitivity Analysis of Nonpoint Source Pollution Models. Amer. Soc. of Agr. Engineers. Paper no. 92- 7062. An ASAE presentation. Texas Department of Water Resources. 1982. Trinity-San Jacinto Estuary: An Analysis of Bay Segment Boundaries, Physical Characteristics, and Nutrient Processes. 77 pp. Texas Water Commission. 1990. The State of Texas Water Quality Inventory. 10th Edition. 643 pp. USDA - ES. 1990. National Pesticide/Soils Database and User Decision Support System for Risk Assessment of Ground and Surface Water Contamination, NPURG 9.1 User's Manual. Cooperative Extension Service, University of Maine. 19 pp. United States Department of Agriculture. 1992. Agricultural Chemical Usage 1990, Fruit and Nut Crops Summary. Ag Ch 1(92). 167 pp. United States Department of Agriculture. 1993a. Agricultural Chemical Usage 1992, Field Crops Summary. Ag Ch 1(93). 118 pp. United States Department of Agriculture. 1993b. Agricultural Chemical Usage 1992, Vegetables Summary. Ag Ch 1(93). 270 pp. Vieux, B. E., and S. Needham. 1993. Nonpoint-Pollution model sensitivity to Grid- Cell Size. J. of Water Resources Planning and Management 119(2): 141-157. Wauchope, R. D., R. M. Buttler, A. G. Hornsby, P. W. M. Augustijn-Beckers, and J. P Burt. 1992. The SCS/ARS/CES pesticide properties database for environmental decision-making. Rev. Environ. Contam. Toxicol. 123: 1-164. Whitmore, R. W., J. E. Kelly, and P. L. Reading. 1992. National Home and Garden Pesticide Use Survey, Final Report, Executive Summary. RTI/5100/17-03F. Research Triangle Institute, Research Triangle Park, North Carolina. 45 ------- Appendix A. DEFINITIONS. ACRE TREATMENT: "acre treats" as utilized by Holloway et al. (1990) is a sum of the acres treated such that when a specific acre was treated twice it was counted twice. Consequently, if the same ten acre field was treated ten times the acre treats would be one hundred. Acre treats in the study by Holloway et al. (1990) were referred to as acre treatments in this report. ACRE TREATS: (see acre treatments). ACTIVE INGREDIENT: the chemical in a formulated pesticide product that causes death of the insect. Pesticides are formulated with a certain percentage of active ingredient. Estimates of pesticide use usually correct for the percentage of active ingredient to make comparisons comparable from one study to another. EPA REGION VI: a portion of the United States consisting of Arkansas, Louisiana, New Mexico, Oklahoma, and Texas. HALF LIFE (t 1/2): the time it takes for half of the amount of substance in a living system (e.g., body, soil, water) to be broken down and/or eliminated by natural processes. The shorter the t 1/2, the faster the chemical is broken down/eliminated (EXTOXNET 1989). Field half life (days) is the time required for one half of the pesticide to breakdown in the soil (Wauchope et al. 1992). LC^: lethal concentration fifty; that concentration of chemical in air or water that kills half (50%) of the experimental animals exposed to it for a set time period (EXTOXNET 1989). LC50 is the lethal concentration of pesticide (ug/1) that kills 50% of the fish tested in 96 hours (EXTOXNET 1989). LDgg (ORAL, DERMAL or RESPIRATORY): lethal dose fifty; the dose of a poisonous substance (given by mouth, absorbed through the skin, or inhaled, respectively) that causes death in half (50%) of the test population. A value used to show the toxicity of a chemical expressed in milligrams (mg) of toxic chemical per kilogram (kg) of body weight: mg/kg. LD50s do not indicate the dosages necessary to produce poisoning symptoms, disease conditions, or other nonlethal effects on health. A high LD50 can not be interpreted as an indication of safety or lack of having the capacity to poison (EXTOXNET 1989). The LD50 is the lethal dose (ug/1) that kills 50% of rats in 96 hours (EXTOXNET 1989). OCTANOL/WATER PARTITION COEFFICIENT (K„J: an indicator of soil adsorption and bioaccumulation, calculated by using measurements of pesticide distribution between octanol and water. High octanol water coefficient compounds are likely to bioaccumulate. (EXTOXNET 1989). The octanol/water partition coefficient is an indicator of soil adsorption and bioaccumulation that is calculated using measurements of pesticide distribution between octanol and water. Pesticides with high octanol/water coefficients are likely to bioaccumulate (EXTOXNET 1989). PESTICIDE: a toxic substance that is used to control a pest. Generally a single active ingredient rather than a trade name product. PPM: parts per million; the number of parts of toxicant per million parts of the substance in question; may include the percentage of residue in soil, water or whole animals, for example (EXTOXNET 1989). SOLUBILITY: the concentration of a substance that dissolves in a given solvent HIGH SOLUBILITY: readily dissolves. LOW SOLUBILITY: does not dissolve very well (EXTOXNET 1989). Water solubility is the concentration of a pesticide that dissolves in water (ppm) (EXTOXNET 1989). 46 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* + + + + | HU NUMBER | CROP | PESTICIDE | ACRE TREATMENTS + + + + 12030101 12030101 12030101 CORN CORN CORN ATRAZINE CHLORPYRIFOS TRIFLURALIN 33 51 33 12030101 12030101 12030101 12030101 12030101 12030101 12030101 12030101 12030101 12030101 GRAPES GRAPES GRAPES GRAPES GRAPES GRAPES GRAPES GRAPES GRAPES GRAPES CAPTAN CARBARYL COPPER HYDROXIDE GLYPHOSATE MALATHION MANCOZEB ORYZALIN PHOSMET SETHOXYDIM TRIADIMEFON 6 6 6 6 6 6 20 6 20 12 12030101 12030101 12030101 HAY (GRASS) HAY HAY 2,4-D ATRAZINE PICL0RAM+ 2,4-D 166 634 4772 12030101 12030101 12030101 12030101 12030101 12030101 12030101 MELONS MELONS MELONS MELONS MELONS MELONS MELONS AZINPHOS-METHYL CHLOROTHALONIL ESFENVALERATE METHYL PARATHION SETHOXYDIM TRIADIMEFON TRIFLURALIN 1000 1400 100 400 1200 500 800 12030101 12030101 12030101 OATS OATS OATS 2,4-D CHLORSULFURON DICAMBA 20 154 20 12030101 12030101 12030101 12030101 12030101 12030101 12030101 PEANUTS PEANUTS PEANUTS PEANUTS PEANUTS PEANUTS PEANUTS 2,4-DB BENTAZON CHLOROTHALONIL CHLORPYRIFOS METOLACHLOR SETHOXYDIM TRIFLURALIN 511 409 1637 68 511 13 322 12030101 12030101 12030101 12030101 12030101 12030101 12030101 12030101 12030101 12030101 12030101 PECANS PECANS PECANS PECANS PECANS PECANS PECANS PECANS PECANS PECANS PECANS BENOMYL CARBARYL CHLORPYRIFOS CYPERMETHRIN DISULFOTON GLYPHOSATE PETROLEUM OIL ORYZALIN PHOSALONE PROPICONAZOLE TRIPHENYLTIN HYDROXIDE 34 48 48 5 0 19 2 0 48 17 34 12030101 12030101 12030101 VEGETABLES VEGETABLES VEGETABLES CARBARYL CHLOROTHALONIL SETHOXYDIM 350 175 175 47 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) + + + + | HU NUMBER | CROP | PESTICIDE | ACRE TREATMENTS + + + + 12030101 WHEAT 2,4-D 5996 12030101 WHEAT CHLORSULFURON 10689 12030101 WHEAT DICAMBA 50 12030101 WHEAT DIMETHOATE 5785 12030101 WHEAT MANCOZEB 615 12030101 WHEAT METHYL PARATHION 3529 12030101 WHEAT METSULFURON METHYL 6283 12030101 WHEAT PARATHION 481 12030101 WHEAT PROPICONAZOLE 296 12030101 WHEAT TRIADIMEFON 615 12030102 CORN ATRAZINE 307 12030102 CORN CARBOFURAN 142 12030102 CORN TERBUFOS 307 12030102 GRAPES CAPTAN 14 12030102 GRAPES CARBARYL 14 12030102 GRAPES COPPER HYDROXIDE 14 12030102 GRAPES GLYPHOSATE 14 12030102 GRAPES MALATHION 14 12030102 GRAPES MANCOZEB 14 12030102 GRAPES PHOSMET 14 12030102 HAY (GRASS) 2,4-D 1166 12030102 HAY ATRAZINE 466 12030102 HAY PICLORAM + 2,4-D 3500 12030102 MELONS BENOMYL 150 12030102 MELONS BENSULIDE 100 12030102 MELONS CARBARYL 300 12030102 MELONS CHLOROTHALONIL 150 12030102 MELONS DIAZINON 150 12030102 MELONS DISULFOTON 100 12030102 MELONS FENVALERATE 150 12030102 MELONS MALATHION 150 12030102 MELONS METALAXYL 150 12030102 MELONS MEVINPHOS 150 12030102 OATS 2,4-D 80 12030102 OATS CHLORSULFURON 433 12030102 OATS DICAMBA 80 12030102 OATS DIMETHOATE 86 12030102 PEANUTS 2,4-DB 513 12030102 PEANUTS BENTAZON 53 12030102 PEANUTS CARBARYL 574 12030102 PEANUTS CHLOROTHALONIL 766 12030102 PEANUTS DIAZINON 344 12030102 PEANUTS FLUAZIFOP-P-BUTYL 27 12030102 PEANUTS GLYPHOSATE 153 12030102 PEANUTS MANCOZEB 383 12030102 PEANUTS METOLACHLOR 15 12030102 PEANUTS SULPHUR 383 12030102 PEANUTS TRIFLURALIN 1341 12030102 PEANUTS VERNOLATE 76 48 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) + + + + | HU NUMBER | CROP | PESTICIDE | ACRE TREATMENTS + + + + 12030102 PECANS AZINPHOS-METHYL 40 12030102 PECANS BENOMYL 240 12030102 PECANS CARBARYL 380 12030102 PECANS CHLORPYRIFOS 340 12030102 PECANS CYPERMETHRIN 40 12030102 PECANS DISULFOTON 1 12030102 PECANS GLYPHOSATE 133 12030102 PECANS PETROLEUM OIL 20 12030102 PECANS ORYZALIN 6 12030102 PECANS PHOSALONE 380 12030102 PECANS PROPICONAZOLE 120 12030102 PECANS TRIPHENYLTIN HYDROXIDE 260 12030102 WHEAT 2,4-D 214 12030102 WHEAT BROMOXYNIL 66 12030102 WHEAT CHLORSULFURON 9421 12030102 WHEAT DICAMBA 444 12030102 WHEAT DICLOFOP-METHYL 33 12030102 WHEAT DIMETHOATE 6848 12030102 WHEAT DISULFOTON 633 12030102 WHEAT MANCOZEB 92 12030102 WHEAT METHYL PARATHION 128 12030102 WHEAT METSULFURON METHYL 155 12030102 WHEAT PROPICONAZOLE 163 12030102 WHEAT TRIADIMEFON 700 12030103 BARLEY CHLORSULFURON 1500 12030103 BARLEY PARATHION 1500 12030103 CORN ALACHLOR 840 12030103 CORN ATRAZINE 2230 12030103 CORN BROMOXYNIL 60 12030103 CORN CARBOFURAN 120 12030103 CORN CYANAZINE 80 12030103 CORN DICAMBA 40 12030103 CORN METOLACHLOR 220 12030103 CORN PENDIMETHALIN 160 12030103 CORN TERBUFOS 800 49 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) HU NUMBER CROP PESTICIDE | ACRE TREATMENTS 12030103 COTTON ACEPHATE 1192 12030103 COTTON ALDICARB 1192 12030103 COTTON ARSENIC ACID 3179 12030103 COTTON CYANAZINE 994 12030103 COTTON CYHALOTHRIN 119 12030103 COTTON DICROTOPHOS 6156 12030103 COTTON DIMETHOATE 596 12030103 COTTON DISULFOTON 3113 12030103 COTTON DIURON 953 12030103 COTTON ENDOTHALL 397 12030103 COTTON ETHEPHON 794 12030103 COTTON FENVALERATE 796 12030103 COTTON FLUAZIFOP-P-BUTYL 79 12030103 COTTON FLUOMETURON 379 12030103 COTTON MEPIQUAT-CHLORIDE 79 12030103 COTTON METHYL PARATHION 500 12030103 COTTON PARAQUAT 397 12030103 COTTON PENDIMETHALIN 3665 12030103 COTTON PROMETRYN 830 12030103 COTTON SETHOXYDIM 1589 12030103 COTTON THIDIAZURON 79 12030103 COTTON THIODICARB 1589 12030103 COTTON TRIFLURALIN 3665 12030103 GRAPES BENOMYL 9 12030103 GRAPES GLYPHOSATE 15 12030103 GRAPES ORYZALIN 5 12030103 GRAPES SETHOXYDIM 20 12030103 GRAPES TRIADIMEFON 3 12030103 HAY (GRASS) 2,4-D 2000 12030103 HAY CARBARYL 1500 12030103 HAY PICLORAM + 2,4-D 2916 12030103 MELONS CHLOROTHALONIL 200 12030103 MELONS ESFENVALERATE 50 12030103 MELONS METHYL PARATHION 200 12030103 MELONS SETHOXYDIM 100 12030103 MELONS TRIFLURALIN 100 12030103 OATS BROMOXYNIL 329 12030103 OATS CHLORSULFURON 1094 12030103 OATS DICAMBA 392 12030103 OATS PARATHION 400 50 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) + +- + + | HU NUMBER | CROP | PESTICIDE | ACRE TREATMENTS +— + + + 12030103 PEANUTS 2,4-DB 1900 12030103 PEANUTS ACEPHATE 300 12030103 PEANUTS ACIFLUORFEN . 186 12030103 PEANUTS ALACHLOR 2050 12030103 PEANUTS ALDICARB 775 12030103 PEANUTS BENTAZON 350 12030103 PEANUTS CARBOFURAN 200 12030103 PEANUTS CHLOROTHALONIL 300 12030103 PEANUTS DISULFOTON 225 12030103 PEANUTS METOLACHLOR 750 12030103 PEANUTS QUINTOZENE 1000 12030103 PEANUTS PENDIMETHALIN 2100 12030103 PEANUTS PROPICONAZOLE 325 12030103 PEANUTS SETHOXYDIM 725 12030103 PEANUTS TRIFLURALIN 250 12030103 VEGETABLES CARBARYL 130 12030103 VEGETABLES CHLOROTHALONIL 65 12030103 VEGETABLES SETHOXYDIM 65 12030103 WHEAT 2,4-D 3537 12030103 WHEAT BROMOXYNIL 3690 12030103 WHEAT CHLORSULFURON 39123 12030103 WHEAT DICAMBA 2666 12030103 WHEAT DICLOFOP METHYL 1023 12030103 WHEAT DIMETHOATE 20431 12030103 WHEAT DISULFOTON 17436 12030103 WHEAT MANCOZEB 560 12030103 WHEAT METHYL PARATHION 11469 12030103 WHEAT METSULFURON METHYL 11545 12030103 WHEAT PARATHION 2857 12030103 WHEAT PROPICONAZOLE 4479 12030103 WHEAT TRIADIMEFON 6786 12030104 CORN ATRAZINE 282 12030104 CORN CHLORPYRIFOS 49 12030104 CORN TRIFLURALIN 32 51 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) + + + + | HU NUMBER | CROP | PESTICIDE | ACRE TREATMENTS + + + + 12030104 COTTON ACEPHATE 307 12030104 COTTON ALDICARB 307 12030104 COTTON ARSENIC ACID 820 12030104 COTTON CYANAZINE 205 12030104 COTTON CYHALiOTHRI N 30 12030104 COTTON DICROTOPHOS 656 12030104 COTTON DIMETHOATE 153 12030104 COTTON DIURON 246 12030104 COTTON ENDOTHALL 102 12030104 COTTON ETHEPHON 205 12030104 COTTON FENVALERATE 153 12030104 COTTON FLUAZIFOP-P-BUTYL 20 12030104 COTTON FLUOMETURON 20 12030104 COTTON MEPIQUAT-CHLORIDE 20 12030104 COTTON PARAQUAT 102 12030104 COTTON PENDIMETHALIN 410 12030104 COTTON SETHOXYDIM 410 12030104 COTTON THIDIAZURON 20 12030104 COTTON THIODICARB 410 12030104 COTTON TRIFLURALIN 410 12030104 GRAPES ORYZALIN 5 12030104 GRAPES SETHOXYDIM 5 12030104 GRAPES TRIADIMEFON 3 + + + + j12030104 |HAY (GRASS) |PICLORAM + 2,4-D | 2000 + + + + 12030104 12030104 12030104 12030104 12030104 MELONS MELONS MELONS MELONS MELONS CHLOROTHALONIL ESFENVALERATE METHYL PARATHION SETHOXYDIM TRIFLURALIN 1100 275 1100 550 550 12030104 12030104 12030104 12030104 OATS OATS OATS OATS BROMOXYNIL CHLORSULFURON DICAMBA DIMETHOATE 20 295 20 13 12030104 12030104 12030104 PEANUTS PEANUTS PEANUTS CHLORPYRIFOS SETHOXYDIM TRIFLURALIN 272 54 600 12030104 12030104 12030104 VEGETABLES VEGETABLES VEGETABLES CARBARYL CHLOROTHALONIL SETHOXYDIM 200 100 100 52 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) HU NUMBER CROP PESTICIDE | ACRE TREATMENTS 12030104 WHEAT 2,4-D 498 12030104 WHEAT BROMOXYNIL 822 12030104 WHEAT CHLORSULFURON 8219 12030104 WHEAT DICAMBA 658 12030104 WHEAT DICLOFOP METHYL 164 12030104 WHEAT DIMETHOATE 2600 12030104 WHEAT DISULFOTON 4112 12030104 WHEAT MANCOZEB 589 12030104 WHEAT METHYL PARATHION 3439 12030104 WHEAT METSULFURON METHYL 1994 12030104 WHEAT PROPICONAZOLE 944 12030104 WHEAT TRIADIMEFON 1916 12030105 CORN ALACHLOR 1784 12030105 CORN ATRAZINE 10947 12030105 CORN CARBOFURAN 1710 12030105 CORN CHLORPYRIFOS 2925 12030105 CORN CYANAZINE 208 12030105 CORN DICAMBA 1253 12030105 CORN METHOMYL 1044 12030105 CORN METOLACHLOR + ATRAZINE 3625 12030105 CORN TERBUFOS 10013 12030105 COTTON ACEPHATE 6168 12030105 COTTON ALDICARB 4089 12030105 COTTON ARSENIC ACID 14735 12030105 COTTON AZINPHOS-METHYL 4769 12030105 COTTON BIFENTHRIN 1558 12030105 COTTON BUTIFOS 3764 12030105 COTTON CYFLUTHRIN 519 12030105 COTTON CYHALOTHRIN 1427 12030105 COTTON CYPERMETHRIN 1554 12030105 COTTON DICROTOPHOS 12724 12030105 COTTON DIMETHOATE 37 12030105 COTTON DISULFOTON 1165 12030105 COTTON DIURON 388 12030105 COTTON ESFENVALERATE 2205 12030105 COTTON ETHEPHON 2078 12030105 COTTON FLUAZIFOP-P-BUTYL 6362 12030105 COTTON GLYPHOSATE 3764 12030105 COTTON METHOMYL 2690 12030105 COTTON METHYL PARATHION 10014 12030105 COTTON METOLACHLOR 1750 12030105 COTTON MONOCROTOPHOS 388 12030105 COTTON MONOSODIUM METHANEARSONATE 1233 12030105 COTTON OXYDEMETON-METHYL 2598 12030105 COTTON PARAQUAT 5682 12030105 COTTON PENDIMETHALIN 1233 12030105 COTTON PHOSPHAMIDON 2078 12030105 COTTON PROFENOFOS 5196 12030105 COTTON PROMETRYN 11558 12030105 COTTON PROPARGITE 2370 12030105 COTTON SETHOXYDIM 1039 12030105 COTTON THIDIAZURON 3764 12030105 COTTON THIODICARB 13603 12030105 COTTON TRIFLURALIN 9475 53 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) HU NUMBER | CROP j PESTICIDE | ACRE TREATMENTS 12030105 12030105 HAY (GRASS) HAY 2,4-D PICLORAM + 2,4-D 3382 3316 12030105 |OATS |METHYL PARATHION | 60 12030105 12030105 12030105 12030105 PECANS PECANS PECANS PECANS CARBARYL DIMETHOATE PHOSALONE TRIPHENYLTIN HYDROXIDE 500 500 500 50 12030105 12030105 12030105 12030105 12030105 12030105 12030105 12030105 12030105 12030105 12030105 12030105 WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT 2,4-D BROMOXYNIL CHLORSULFURON DICLOFOP-METHYL DIMETHOATE DISULFOTON PARATHION MANCOZEB METHYL PARATHION METSULFURON METHYL PROPICONAZOLE TRIADIMEFON 1874 666 12762 333 12305 8890 947 666 315 1333 2123 1983 12030106 12030106 12030106 12030106 12030106 12030106 12030106 12030106 12030106 CORN CORN CORN CORN CORN CORN CORN CORN CORN ALACHLOR ATRAZINE BROMOXYNIL CARBOFURAN CYANAZINE DICAMBA METOLACHLOR PENDIMETHALIN TERBUFOS 7400 4243 225 656 300 150 600 600 7443 12030106 12030106 12030106 12030106 12030106 12030106 12030106 COTTON COTTON COTTON COTTON COTTON COTTON COTTON DICROTOPHOS DIMETHOATE DISULFOTON METHYL PARATHION PENDIMETHALIN PROMETRYN TRIFLURALIN 2264 33 2264 43 1509 603 1509 12030106 12030106 12030106 12030106 HAY (GRASS) HAY HAY HAY 2,4-D ATRAZINE CARBARYL PICLORAM + 2,4-D 2050 211 1500 1361 12030106 12030106 12030106 OATS OATS OATS BROMOXYNIL CHLORSULFURON DICAMBA 250 375 312 12030106 12030106 12030106 12030106 SOYBEANS SOYBEANS SOYBEANS SOYBEANS FLUAZIFOP-P-BUTYL METOLACHLOR SETHOXYDIM TRIFLURALIN 35 17 11 23 54 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) HU NUMBER CROP PESTICIDE ACRE TREATMENTS 12030106 WHEAT 2,4-D 8476 12030106 WHEAT BROMOXYNIL 142 12030106 WHEAT CHLORSULFURON 11145 12030106 WHEAT DICLOFOP METHYL 235 12030106 WHEAT DIMETHOATE 11194 12030106 WHEAT DISULFOTON 15385 12030106 WHEAT GLYPHOSATE 38 12030106 WHEAT MALATHION 576 12030106 WHEAT MANCOZEB 598 12030106 WHEAT METHYL PARATHION 6208 12030106 WHEAT METSULFURON METHYL 2395 12030106 WHEAT PROP1CONAZOLE 829 12030106 WHEAT TRIADIMEFON 956 12030107 CORN ATRAZINE 62 12030107 CORN CARBARYL 62 12030107 COTTON DIMETHOATE 1000 12030107 COTTON DSMA 550 12030107 COTTON DISULFOTON 600 12030107 COTTON DIURON 500 12030107 COTTON FENVALERATE 300 12030107 COTTON FLUAZIFOP-P-BUTYL 300 12030107 COTTON GLYPHOSATE 250 12030107 COTTON METHYL PARATHION 400 12030107 COTTON PENDIMETHALIN 850 12030107 HAY (GRASS) 2,4-D + DICAMBA 3888 12030107 HAY CARBARYL 1555 12030107 HAY PICLORAM + 2,4-D 5833 12030107 HAY TRICLOPYR: 2,4-D 1/2 388 12030107 MELONS CHLORTHAL DIMETHYL 28 12030107 MELONS BENOMYL 25 12030107 MELONS CHLOROTHALONIL 42 12030107 MELONS DIAZINON 50 12030107 MELONS ENDOSULFAN 100 12030107 MELONS OXYDEMETON-METHYL 100 12030107 MELONS TRIFLURALIN 85 12030107 OATS CARBARYL 245 12030107 OATS CHLORSULFURON 52 12030107 OATS PARATHION 104 12030107 WHEAT CARBARYL 333 12030107 WHEAT CHLORSULFURON 2082 12030107 WHEAT DIMETHOATE 2236 12030107 WHEAT DISULFOTON 200 12030107 WHEAT MANCOZEB 33 12030107 WHEAT METSULFURON METHYL 967 12030108 CORN ALACHLOR 180 12030108 CORN ATRAZINE 3010 12030108 CORN CARBOFURAN 1807 12030108 CORN METOLACHLOR + ATRAZINE 14776 12030108 CORN TERBUFOS 4218 55 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) HU NUMBER CROP PESTICIDE | ACRE TREATMENTS 12030108 COTTON ACEPHATE 9482 12030108 COTTON ALDICARB 5681 12030108 COTTON ARSENIC ACID 22357 12030108 COTTON AZINPHOS-METHYL 4371 12030108 COTTON BUTIFOS 12070 12030108 COTTON CARBOFURAN 1727 12030108 COTTON CYHALOTHRIN 1028 12030108 COTTON CYPERMETHRIN 4805 12030108 COTTON DICROTOPHOS 8244 12030108 COTTON DIMETHOATE 3110 12030108 COTTON DISULFOTON 3085 12030108 COTTON DIURON 1028 12030108 COTTON ESFENVALERATE 5159 12030108 COTTON PARATHION 13131 12030108 COTTON FENVALERATE 2073 12030108 COTTON FLUAZIFOP-P-BUTYL 5850 12030108 COTTON GLYPHOSATE 9996 12030108 COTTON METHOMYL 4371 12030108 COTTON METHYL PARATHION 4371 12030108 COTTON METOLACHLOR 2571 12030108 COTTON MONOCROTOPHOS 1028 12030108 COTTON MONOSODIUM METHANEARSONATE 514 12030108 COTTON PARAQUAT 1285 12030108 COTTON PENDIMETHALIN 514 12030108 COTTON PROMETRYN 16216 12030108 COTTON PROPARGITE 2844 12030108 COTTON THIDIAZURON 3776 12030108 COTTON THIODICARB 4371 12030108 COTTON TRIFLURALIN 19640 12030108 HAY (GRASS) 2,4-D 10318 12030108 HAY CARBARYL 533 12030108 HAY DICAMBA 2750 12030108 HAY PICLORAM + 2,4-D 7500 12030108 OATS CHLORSULFURON 592 12030108 OATS PARATHION 592 12030108 OATS METHYL PARATHION 180 12030108 PECANS BENOMYL 21 12030108 PECANS CARBARYL 1021 12030108 PECANS CHLORPYRIFOS 21 12030108 PECANS DIMETHOATE 1000 12030108 PECANS MALATHION 21 12030108 PECANS PETROLEUM OIL 21 12030108 PECANS PHOSALONE 1000 12030108 PECANS PROPICONAZOLE 14 12030108 PECANS TRIPHENYLTIN HYDROXIDE 121 56 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) HU NUMBER CROP PESTICIDE | ACRE TREATMENTS 12030108 WHEAT 2,4*-D 4954 12030108 WHEAT BROMOXYNIL 222 12030108 WHEAT CHLORSULFURON 12877 12030108 WHEAT DICLOFOP-METHYL 111 12030108 WHEAT DIMETHOATE 13679 12030108 WHEAT DISULFOTON 4638 12030108 WHEAT PARATHION 14570 12030108 WHEAT MANCOZEB 389 12030108 WHEAT METHYL PARATHION 1263 12030108 WHEAT METSULFURON METHYL 444 12030108 WHEAT PARATHION 291 12030108 WHEAT PROPICONAZOLE 10872 12030108 WHEAT TRIADIMEFON 7334 12030109 CORN ALACHLOR 1579 12030109 CORN ATRAZINE 13613 12030109 CORN CARBOFURAN 1462 12030109 CORN CHLORPYRIFOS 4255 12030109 CORN CYANAZINE 303 12030109 CORN DICAMBA 1823 12030109 CORN METHOMYL 1519 12030109 CORN METOLACHLOR + ATRAZINE 5823 12030109 CORN TERBUFOS 11458 12030109 COTTON ACEPHATE 6530 12030109 COTTON ALDICARB 4260 12030109 COTTON ARSENIC ACID 15942 12030109 COTTON AZINPHOS-METHYL 5060 12030109 COTTON BIFENTHRIN 1558 12030109 COTTON BUTIFOS 3969 12030109 COTTON CYFLUTHRIN 519 12030109 COTTON CYHALOTHRIN 1496 12030109 COTTON CYPERMETHRIN 1828 12030109 COTTON DICROTOPHOS 13389 12030109 COTTON DISULFOTON 1371 12030109 COTTON DIURON 457 12030109 COTTON ESFENVALERATE 2410 12030109 COTTON ETHEPHON 2078 12030109 COTTON FLUAZIFOP-P-BUTYL 6568 12030109 COTTON GLYPHOSATE 3969 12030109 COTTON METHOMYL 2982 12030109 COTTON METHYL PARATHION 10638 12030109 COTTON METOLACHLOR 2081 12030109 COTTON MONOCROTOPHOS 457 12030109 COTTON MONOSODIUM METHANEARSONATE 1267 12030109 COTTON OXYDEMETON-METHYL 2598 12030109 COTTON PARAQUAT 5768 12030109 COTTON PENDIMETHALIN 1267 12030109 COTTON PHOSPHAMIDON 2078 12030109 COTTON PROFENOFOS 5196 12030109 COTTON PROMETRYN 11764 12030109 COTTON PROPARGITE 2421 12030109 COTTON SETHOXYDIM 1039 12030109 COTTON THIDIAZURON 3969 12030109 COTTON THIODICARB 13894 12030109 COTTON TRIFLURALIN 10420 57 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) HU NUMBER CROP PESTICIDE | ACRE TREATMENTS 12030109 HAY (GRASS) 2,4-D 3399 12030109 HAY DICAMBA 2000 12030109 HAY PICLORAM + 2,4-D 3333 12030109 OATS CHLORSULFURON 88 12030109 OATS DIMETHOATE 88 12030109 OATS METHYL PARATHION 60 12030109 PEANUTS ALACHLOR 81 12030109 PEANUTS TRIFLURALIN 218 12030109 PECANS CARBARYL 500 12030109 PECANS DIMETHOATE 500 12030109 PECANS PHOSALONE 500 12030109 PECANS TRIPHENYLTIN HYDROXIDE 50 12030109 WHEAT 2,4-D 1474 12030109 WHEAT BROMOXYNIL 1333 12030109 WHEAT CHLORSULFURON 37213 12030109 WHEAT DICAMBA 3673 12030109 WHEAT DICLOFOP-METHYL 666 12030109 WHEAT DIMETHOATE 36375 12030109 WHEAT DISULFOTON 13472 12030109 WHEAT PARATHION 4036 12030109 WHEAT MANCOZEB 1333 12030109 WHEAT METHYL PARATHION 973 12030109 WHEAT METSULFURON METHYL 2667 12030109 WHEAT PROPICONAZOLE 5845 12030109 WHEAT TRIADIMEFON 5439 12030201 COTTON ACEPHATE 28 12030201 COTTON ALDICARB 28 12030201 COTTON ARSENIC ACID 97 12030201 COTTON AZINPHOS-METHYL 48 12030201 COTTON BUTIFOS 34 12030201 COTTON CYHALOTHRIN 11 12030201 COTTON CYPERMETHRIN 45 12030201 COTTON DICROTOPHOS 68 12030201 COTTON DISULFOTON 34 12030201 COTTON DIURON 11 12030201 COTTON ESFENVALERATE 34 12030201 COTTON FLUAZIFOP-P-BUTYL 34 12030201 COTTON GLYPHOSATE 34 12030201 COTTON METHOMYL 48 12030201 COTTON METHYL PARATHION 48 12030201 COTTON METOLACHLOR 28 12030201 COTTON MONOCROTOPHOS 11 12030201 COTTON MONOSODIUM METHANEARSONATE 5 12030201 COTTON PARAQUAT 14 12030201 COTTON PENDIMETHALIN 5 12030201 COTTON PROMETRYN 34 12030201 COTTON PROPARGITE 8 12030201 COTTON THIDIAZURON 34 12030201 COTTON THIODICARB 48 12030201 COTTON TRIFLURALIN 80 58 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) + + ; + + | HU NUMBER | CROP | PESTICIDE | ACRE TREATMENTS + + + + ' 12030201 12030201 12030201 12030201 HAY (GRASS) HAY HAY HAY 2,4-D + DICAMBA CARBARYL MALATHION PICLORAM + 2,4-D 34936 5337 6666 5365 12030201 12030201 12030201 MELONS MELONS MELONS CAPTAN CHLOROTHALONIL MALATHION 7 7 7 12030201 12030201 12030201 12030201 12030201 12030201 12030201 12030201 12030201 PECANS PECANS PECANS PECANS PECANS PECANS PECANS PECANS PECANS AZINPHOS-METHYL BENOMYL CARBARYL CHLORPYRIFOS MALATHION PETROLEUM OIL PHOSALONE PROPICONAZOLE TRIPHENYLTIN HYDROXIDE 25 46 21 21 21 46 25 14 21 12030201 12030201 12030201 12030201 12030201 12030201 12030201 12030201 WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT WHEAT 2,4-D CHLORSULFURON DIMETHOATE DISULFOTON PARATHION METHYL PARATHION PROPICONAZOLE TRIADIMEFON 52 126 52 42 63 21 52 21 12030202 12030202 12030202 12030202 CORN CORN CORN CORN CARBARYL DIAZINON PENDIMETHALIN PERMETHRIN 28 39 33 33 12030202 12030202 12030202 COTTON COTTON COTTON DIMETHOATE SULPROFOS TRIFLURALIN 900 900 900 12030202 12030202 12030202 12030202 HAY (GRASS) HAY HAY HAY 2,4-D + DICAMBA CARBARYL CLOPYRALID PICLORAM + 2,4-D 8480 443 160 5209 12030202 12030202 OATS OATS MALATHION 1 50 MANCOZEB 45 59 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) | HU NUMBER CROP PESTICIDE | ACRE TREATMENTS 12030202 RICE ACIFLUORFEN 19 12030202 RICE BENOMYL 19 12030202 RICE BENTAZON 48 12030202 RICE CARBARYL 97 12030202 RICE CARBOFURAN 78 12030202 RICE FURORE 9 12030202 RICE IPRODIONE 29 12030202 RICE METHYL PARATHION 117 12030202 RICE MOLINATE 146 12030202 RICE PENDIMETHALIN 9 12030202 RICE PROPANIL 292 12030202 RICE PROPICONAZOLE 48 12030202 RICE THIOBENCARB 48 12030202 SOYBEANS ACIFLUORFEN 21 12030202 SOYBEANS ALACHLOR 10 12030202 SOYBEANS BENTAZON 21 12030202 SOYBEANS CARBARYL 10 12030202 SOYBEANS FLUAZIFOP-P-BUTYL 10 12030202 SOYBEANS FOMESAFEN 5 12030202 SOYBEANS IMAZAQUIN 10 12030202 SOYBEANS LINURON 5 12030202 SOYBEANS MALATHION 75 12030202 SOYBEANS METHYL PARATHION 32 12030202 SOYBEANS METOLACHLOR 32 12030202 SOYBEANS METRIBUZIN 10 12030202 SOYBEANS PERMETHRIN 32 12030202 SOYBEANS SETHOXYDIM 16 12030202 VEGETABLES BENOMYL 39 12030202 VEGETABLES CARBARYL 10 12030202 VEGETABLES CHLOROTHALONIL 26 12030202 VEGETABLES DIAZINON 68 12030202 VEGETABLES GLYPHOSATE 63 12030202 VEGETABLES MALATHION 52 12030202 WHEAT CARBARYL 50 12030202 WHEAT DIMETHOATE 75 12030202 WHEAT TRIADIMEFON 50 12030203 CORN CARBOFURAN 104 12030203 HAY (GRASS) 2,4-D 227 112030203 HAY PICLORAM + 2,4-D 76 60 ------- Appendix B. Acre treatments of agricultural pesticides used in 1990 in the Trinity River Basin (TRB) by hydrologic unit (HU) and by crop.* (continued) j HU NUMBER | CROP | PESTICIDE | ACRE TREATMENTS + + + + 12030203 RICE ACIFLUORFEN 1416 12030203 RICE BENOMYL 1417 12030203 RICE BENTAZON 3543 12030203 RICE CARBARYL 7087 12030203 RICE CARBOFURAN 5237 12030203 RICE FURORE 708 12030203 RICE IPRODIONE 2125 12030203 RICE METHYL PARATHION 8504 12030203 RICE MOLINATE + PROPANIL 11091 12030203 RICE PENDIMETHALIN 492 12030203 RICE PROPANIL 19098 12030203 RICE PROPICONAZOLE 3543 12030203 RICE THIOBENCARB 3326 12030203 SOYBEANS ACIFLUORFEN 4832 12030203 SOYBEANS ALACHLOR + TRIFLURALIN 3415 12030203 SOYBEANS BENTAZON 4832 12030203 SOYBEANS CARBARYL 2416 12030203 SOYBEANS FENVALERATE 799 12030203 SOYBEANS FLUAZIFOP-P-BUTYL 2416 12030203 SOYBEANS FOMESAFEN 1208 12030203 SOYBEANS IMAZAQUIN 2416 12030203 SOYBEANS LINURON 1208 + + + + * Data taken from Holloway et al. 1990. Melons and watermelons have been combined. Parathion and ethyl parathion estimates have been combined. 61 ------- Appendix C. Application rates of agricultural pesticides reported from the Trinity River Basin in Texas by crop.* h + + MEAN CROP PESTICIDE APPLICATION RATE (LBS./ACRE) BARLEY CHLOROSULFURON 0.25 BARLEY PARATHION 0.50 CORN ALACHLOR 2.37 CORN ATRAZINE 1.92 CORN BROMOXYNIL 0.17 CORN CARBARYL 1.37 CORN CARBOFURAN 1.55 CORN CHLORPYRIFOS 1.39 CORN CYANAZINE 2.67 CORN DIAZINON 0.36 CORN DICAMBA 0.36 CORN METHOMYL 0.36 CORN METOLACHLOR 2.15 CORN METOLACHLOR + ATRAZINE 1.09 CORN PENDIMETHALIN 0.58 CORN PERMETHRIN 0.11 CORN TERBUFOS 1.79 CORN TRIFLURALIN 0.33 COTTON ACEPHATE 0.62 COTTON ALDICARB 1.65 COTTON ARSENIC ACID 1.13 COTTON AZINPHOS-METHYL 0.07 COTTON BIFENTHRIN 0.07 COTTON BUTIFOS 1.05 COTTON CARBARYL 1.11 COTTON CARBOFURAN 1.00 COTTON CYANAZINE 2.08 COTTON CYFLUTHRIN 0.04 COTTON CYHALOTHRIN 0.03 COTTON CYPERMETHRIN 0.06 COTTON DICROTOPHOS 0.30 COTTON DIMETHOATE 0.19 COTTON DSMA 2.25 COTTON DISULFOTON 0.59 COTTON DIURON 1.50 COTTON ENDOTHALL 0.07 COTTON ESFENVALERATE 0.03 COTTON ETHEPHON 1.25 COTTON FENVALERATE 0.13 COTTON FLUAZIFOP-P-BUTYL 1.89 COTTON FLUOMETURON 1.50 COTTON GLYPHOSATE 0.88 COTTON LAMDACYHALOTHRIN* 0.03 COTTON MEPIQUAT-CHLORIDE 0.03 COTTON METHOMYL 0.42 COTTON METHYL PARATHION 0.81 COTTON METOLACHLOR 1.75 COTTON MONOCROTOPHOS 0.62 COTTON MONOSODIUM METHANEARSONATE 0.84 COTTON OXAMYL* 0.49 62 ------- Appendix C. Application rates of agricultural pesticides reported from the Trinity River Basin in Texas by crop.* (continued) CROP PESTICIDE MEAN APPLICATION RATE (LBS./ACRE) COTTON OXYDEMETON-METHYL 0.19 COTTON PARATHION 0.63 COTTON PARAQUAT 0.14 COTTON PENDIMETHALIN 1.00 COTTON PHOSPHAMIDON 0.16 COTTON PROFENOFOS 0.75 COTTON PROMETRYN 1.77 COTTON PROPARGITE 1.23 COTTON SETHOXYDIM 2.09 COTTON SODIUM CHLORATE* 3.67 COTTON SULPROFOS 0.88 COTTON THIDIAZURON 0.15 COTTON THIODICARB 0.40 COTTON TRALOMETHRIN* 0.02 COTTON TRIFLURALIN 0.75 GRAPES BENOMYL 0.75 GRAPES CAPTAN 1.50 GRAPES CARBARYL 1.50 GRAPES COPPER HYDROXIDE 0.76 GRAPES GLYPHOSATE 0.88 GRAPES MALATHION 1.87 GRAPES MANCOZEB 2.16 GRAPES ORYZALIN 4.00 GRAPES PHOSMET 1.25 GRAPES SETHOXYDIM 0.38 GRAPES TRIADIMEFON 0.10 HAY (GRASS) 2,4-D 2.37 HAY 2,4-D + DICAMBA 1.11 HAY ATRAZINE 1.50 HAY CARBARYL 1.19 HAY CLOPYRALID 0.99 HAY DICAMBA 0.38 HAY MALATHION 0.87 HAY METHYL PARATHION 0.69 HAY PICLORAM + 2,4-D NOT AVAILABLE HAY TRICLOPYR: 2,4-D 1/2 2.30 MELONS CHLORTHAL DIMETHYL 7.50 MELONS AZINPHOS-METHYL 0.44 MELONS BENOMYL 0.19 MELONS BENSULIDE 5.50 MELONS CAPTAN NOT AVAILABLE MELONS CARBARYL 0.77 MELONS CHLOROTHALONIL 1.69 MELONS DIAZINON 0.79 MELONS DISULFOTON 2.00 MELONS ENDOSUFAN 0.76 MELONS ESFENVALERATE 0.04 MELONS FENVALERATE 0.15 63 ------- Appendix C. Application rates of agricultural pesticides reported from the Trinity River Basin in Texas by crop.* (continued) MEAN CROP PESTICIDE APPLICATION RATE (LBS./ACRE) MELONS MALATHION 0.87 MELONS METALAXYL 1.50 MELONS METHYL PARATHION 0.44 MELONS MEVINPHOS 0.19 MELONS OXYDEMETON-METHYL 0.40 MELONS SETHOXYDIM 0.24 MELONS TRIADIMEFON 0.10 MELONS TRIFLURALIN 0.75 OATS 2,4-D 0.83 OATS BROMOXYNIL 0.44 OATS CARBARYL 0.41 OATS CHLOROSULFURON 0.01 OATS DICAMBA 0.13 OATS DIMETHOATE 0.31 OATS MALATHION 0.02 OATS MANCOZEB 1.60 OATS METHYL PARATHION 0.62 OATS PARATHION 0.63 PEANUTS 2,4-D 0.36 PEANUTS 2,4-DB 0.23 PEANUTS QUINTOZENE 6.38 PEANUTS ACEPHATE 0.63 PEANUTS ACIFLUORFEN 0.25 PEANUTS ALACHLOR 3.50 PEANUTS ALDICARB 2.03 PEANUTS BENTAZON 0.75 PEANUTS CARBARYL 1.25 PEANUTS CARBOFURAN 2.75 PEANUTS CHLOROTHALONIL 0.94 PEANUTS CHLORPYRIFOS 1.13 PEANUTS DIAZINON 2.00 PEANUTS DISULFOTON 1.50 PEANUTS FLUAZIFOP-P-BUTYL 0.17 PEANUTS GLYPHOSATE 0.88 PEANUTS MANCOZEB 1.21 PEANUTS METOLACHLOR 1.63 PEANUTS PENDIMETHALIN 0.63 PEANUTS PROPICONAZOLE 0.83 PEANUTS SETHOXYDIM 0.23 PEANUTS SULPHUR 1.47 PEANUTS TRIFLURALIN 0.47 PEANUTS VERNOLATE 2.34 PECANS AZINPHOS-METHYL 0.47 PECANS BENOMYL 2.88 PECANS CARBARYL 1.75 PECANS CHLORPYRIFOS 2.00 PECANS CYPERMETHRIN 0.08 PECANS DIMETHOATE 0.33 64 ------- Appendix C. Application rates of agricultural pesticides reported from the Trinity River Basin in Texas by crop.* (continued) MEAN CROP PESTICIDE APPLICATION RATE (LBS./ACRE) PECANS DISULFOTON 2.25 PECANS GLYPHOSATE 3.04 PECANS MALATHION 5.08 PECANS OIL 3.00 PECANS ORYZALIN 4.00 PECANS PHOSALONE 1.50 PECANS PROPINCONZOLE 0.14 PECANS TRIPHENYLTIN HYDROXIDE 0.27 RICE ACIFLUORFEN 0.56 RICE BENOMYL 0.75 RICE BENTAZON 0.87 RICE CARBARYL 1.25 RICE CARBOFURAN 0.53 RICE FURORE NOT AVAILABLE RICE IPRODIONE 0.50 RICE METHYL PARATHION 0.50 RICE MOLINATE 3.50 RICE MOLINATE + PROPANIL 2.63 RICE PENDIMETHALIN 1.00 RICE PROPANIL 5.00 RICE PROPINCONAZOLE 0.22 RICE THIOBENCARB 4.00 SOYBEANS ACIFLUORFEN 0.43 SOYBEANS ALACHLOR 1.50 SOYBEANS ALACHLOR + TRIFLURALIN 0.53 SOYBEANS BENTAZON 0.75 SOYBEANS CARBARYL 1.33 SOYBEANS FENVALERATE 0.13 SOYBEANS FLUAZIFOP-P-BUTYL 1.89 SOYBEANS FOMESAFEN 2.25 SOYBEANS IMAZAQUIN 0.10 SOYBEANS LINURON 1.25 SOYBEANS MALATHION 0.58 SOYBEANS METHYL PARATHION 0.63 SOYBEANS METOLACHLOR 2.05 SOYBEANS METRIBUZIN 0.67 SOYBEANS PERMETHRIN 0.09 SOYBEANS SETHOXYDIM 0.23 SOYBEANS TRIFLURALIN 1.75 VEGETABLES BENOMYL 2.81 VEGETABLES CARBARYL 1.37 VEGETABLES CHLOROTHALONIL 1.33 VEGETABLES DIAZINON 2.00 VEGETABLES GLYPHOSATE 0.37 VEGETABLES MALATHION 1.09 VEGETABLES SETHOXYDIM 0.07 jWHEAT j 2,4-D j 0.36 j 65 ------- Appendix C. Application rates of agricultural pesticides reported from the Trinity River Basin in Texas by crop.* (continued) CROP PESTICIDE MEAN APPLICATION RATE (LBS./ACRE) WHEAT BROMOXYNIL 0.37 WHEAT CARBARYL 1.30 WHEAT CHLOROSULFURON 0.01 WHEAT DICAMBA 0.13 WHEAT DICLOFOP-METHYL 0.31 WHEAT DIMETHOATE 0.12 WHEAT DISULFOTON 1.01 WHEAT GLYPHOSATE 0.11 WHEAT MALATHION 0.39 WHEAT MANCOZEB 1.60 WHEAT METHYL PARATHION 0.50 WHEAT METSULFURON METHYL 0.00 WHEAT PARATHION 0.63 WHEAT PROPICANOZOLE 0.11 WHEAT TRIADIMEFON 0.16 + + + + * Application rates were taken from product labels in Crop Protection Chemicals (1991). Median rates were reported when a range of application rates was on the label. Means were reported when multiple labels were available. Application rates with an asterisk were taken from USDA (1992, 1993a, b). All rates are rounded to two decimals places. 66 ------- Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and pesticide in 1990.* TOTAL APPLIED HU NUMBER PESTICIDE (lbs.) 12030101 2,4-D ACID 2558 12030101 2,4-DB 117 12030101 ATRAZINE 1014 12030101 AZINPHOS-METHYL 440 12030101 BENOMYL 97 12030101 BENTAZON 306 12030101 CAPTAN 9 12030101 CARBARYL 574 12030101 CHLOROTHALONIL 4137 12030101 CHLORPYRIFOS 243 12030101 CHLORSULFURON 125 12030101 COPPER HYDROXIDE 4 12030101 CYPERMETHRIN 0 12030101 DICAMBA 9 12030101 DIMETHOATE 673 12030101 DISULFOTON 0 12030101 ESFENVALERATE 3 12030101 GLYPHOSATE 63 12030101 MALATHION 11 12030101 MANCOZEB 996 12030101 METHYL PARATHION 1940 12030101 METOLACHLOR 830 12030101 METSULFURON-METHYL 23 12030101 ORYZALIN 80 12030101 PARATHION 300 12030101 PETROLEUM OIL 6 12030101 PHOSALONE 72 12030101 PHOSMET 7 12030101 PROPICONAZOLE 35 12030101 SETHOXYDIM 310 12030101 TRIADIMEFON 144 12030101 TRIFLURALIN 762 12030101 TRIPHENYLTIN 9 12030102 2,4-D ACID 2900 12030102 2,4-DB 117 12030102 ATRAZINE 1288 12030102 AZINPHOS-METHYL 18 12030102 BENOMYL 718 12030102 BENSULIDE 550 12030102 BENTAZON 39 12030102 BROMOXYNIL 24 12030102 CAPTAN 21 12030102 CARBARYL 1633 12030102 CARBOFURAN 220 12030102 CHLOROTHALONIL 973 12030102 CHLORPYRIFOS 680 12030102 CHLORSULFURON 115 12030102 COPPER HYDROXIDE 10 12030102 CYPERMETHRIN 3 12030102 DIAZINON 806 12030102 DICAMBA 68 12030102 DICLOFOP-METHYL 10 67 ------- Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and pesticide in 1990.* (continued) TOTAL APPLIED HU NUMBER PESTICIDE (lbs.) 12030102 DIMETHOATE 824 12030102 DISULFOTON 838 12030102 FENVALERATE 22 12030102 FLUAZIFOP-P-BUTYL 4 12030102 GLYPHOSATE 550 12030102 MALATHION 156 12030102 MANCOZEB 638 12030102 METALAXYL 225 12030102 METHYL PARATHION 64 12030102 METOLACHLOR 24 12030102 METSULFURON-METHYL 0 12030102 MEVINPHOS 28 12030102 ORYZALIN 24 12030102 PETROLEUM OIL 60 12030102 PHOSALONE 570 12030102 PHOSMET 17 12030102 PROPICONAZOLE 35 12030102 SULPHUR 563 12030102 TERBUFOS 550 12030102 TRIADIMEFON 109 12030102 TRIFLURALIN 630 12030102 TRIPHENYLTIN 70 12030102 VERNOLATE 177 12030103 2,4-D ACID 5998 12030103 2,4-DB 437 12030103 ACEPHATE 926 12030103 ACIFLUORFEN 46 12030103 ALACHLOR 9161 12030103 ALDICARB 3536 12030103 ARSENIC ACID 3576 12030103 ATRAZINE 4281 12030103 BENOMYL 6 12030103 BENTAZON 262 12030103 BROMOXYNIL 1537 12030103 CARBARYL 1963 12030103 CARBOFURAN 736 12030103 CHLOROTHALONIL 706 12030103 CHLORSULFURON 845 12030103 CYANAZINE 2276 12030103 CYHALOTHRIN 2 12030103 DICAMBA 411 12030103 DICLOFOP-METHYL 321 12030103 DICROTOPHOS 1846 12030103 DIMETHOATE 2491 12030103 DISULFOTON 19709 12030103 DIURON 1429 12030103 ENDOTHALL 27 12030103 ESFENVALERATE 1 12030103 ETHEPHON 992 12030103 FENVALERATE 99 12030103 FLUAZIFOP-P-BUTYL 149 12030103 FLUOMETURON 568 68 ------- Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and pesticide in 1990.* (continued) TOTAL APPLIED HU NUMBER PESTICIDE (lbs.) 12030103 GLYPHOSATE 13 12030103 MANCOZEB 896 12030103 MEPIQUAT 1 12030103 METHYL PARATHION 6228 12030103 METOLACHLOR 1691 12030103 METSULFURON-METHYL 43 12030103 ORYZALIN 20 12030103 PARAQUAT 56 12030103 PARATHION 2785 12030103 QUINTOZENE 6375 12030103 PENDIMETHALIN 5070 12030103 PROMETRYN 1473 12030103 PROPICONAZOLE 773 12030103 SETHOXYDIM 3524 12030103 TERBUFOS 1434 12030103 THIDIAZURON 11 12030103 THIODICARB 635 12030103 TRIADIMEFON 1060 12030103 TRIFLURALIN 2941 12030104 2,4-D ACID 178 12030104 ACEPHATE 190 12030104 ALDICARB 506 12030104 ARSENIC ACID 922 12030104 ATRAZINE 541 12030104 BROMOXYNIL 317 12030104 CARBARYL 275 12030104 CHLOROTHALONIL 1992 12030104 CHLORPYRIFOS 373 12030104 CHLORSULFURON 99 12030104 CYANAZINE 425 12030104 CYHALOTHRIN 0 12030104 DICAMBA 88 12030104 DICLOFOP-METHYL 51 12030104 DICROTOPHOS 196 12030104 DIMETHOATE 335 12030104 DISULFOTON 4132 12030104 DIURON 369 12030104 ENDOTHALL 7 12030104 ESFENVALERATE 10 12030104 ETHEPHON 256 12030104 FENVALERATE 19 12030104 FLUAZIFOP-P-BUTYL 37 12030104 FLUOMETURON 30 12030104 MANCOZEB 942 12030104 MEPIQUAT 0 12030104 METHYL PARATHION 2203 12030104 METSULFURON-METHYL 7 12030104 ORYZALIN 20 12030104 PARAQUAT 14 12030104 PENDIMETHALIN 410 12030104 PROPICONAZOLE 106 12030104 SETHOXYDIM 1011 69 ------- Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and pesticide in 1990.* (continued) TOTAL APPLIED HU NUMBER PESTICIDE (lbs.) 12030104 THIDIAZURON 3 12030104 THIODICARB 164 12030104 TRIADIMEFON 299 12030104 TRIFLURALIN 1012 12030105 2,4-D ACID 8670 12030105 ACEPHATE 3824 12030105 ALACHLOR 4219 12030105 ALDICARB 6746 12030105 ARSENIC ACID 16576 12030105 ATRAZINE 21018 12030105 AZINPHOS-METHYL 327 12030105 BIFENTHRIN 101 12030105 BROMOXYNIL 249 12030105 BUTIFOS 3971 12030105 CARBARYL 875 12030105 CARBOFURAN 2659 12030105 CHLORPYRIFOS 4051 12030105 CHLORSULFURON 146 12030105 CYANAZINE 555 12030105 CYFLUTHRIN 19 12030105 CYHALOTHRIN 35 12030105 CYPERMETHRIN 97 12030105 DICAMBA 451 12030105 DICLOFOP-METHYL 104 12030105 DICROTOPHOS 3817 12030105 DIMETHOATE 1605 12030105 DISULFOTON 9626 12030105 DIURON 582 12030105 ESFENVALERATE 72 12030105 ETHEPHON 2597 12030105 FLUAZIFOP-P-BUTYL 12024 12030105 GLYPHOSATE 3293 12030105 MANCOZEB 1065 12030105 METHOMYL 1500 12030105 METHYL PARATHION 8331 12030105 METOLACHLOR 3062 12030105 METOLACHLOR + ATRAZINE 3969 12030105 METSULFURON-METHYL 5 12030105 MONOCROTOPHOS 240 12030105 MONOSODIUM METHANEARSONATE 1035 12030105 OXYDEMETON-METHYL 487 12030105 PARAQUAT 802 12030105 PARATHION 591 12030105 PENDIMETHALIN 1233 12030105 PHOSALONE 750 12030105 PHOSPHAMIDON 324 12030105 PROFENOFOS 3877 12030105 PROMETRYN 20515 12030105 PROPARGITE 2903 12030105 PROPICONAZOLE 238 12030105 SETHOXYDIM 2174 12030105 TERBUFOS 17948 70 ------- Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and pesticide in 1990.* (continued) TOTAL APPLIED HU NUMBER PESTICIDE (lbs.) 12030105 THIDIAZURON 564 12030105 THIODICARB 5441 12030105 TRIADIMEFON 309 12030105 TRIFLURALIN 7106 12030105 TRIPHENYLTIN 13 12030106 2,4-D ACID 7886 12030106 ALACHLOR 17501 12030106 ATRAZINE 8463 12030106 BROMOXYNIL 200 12030106 CARBARYL 1785 12030106 CARBOFURAN 1020 12030106 CHLORSULFURON 134 12030106 CYANAZINE 800 12030106 DICAMBA 94 12030106 DICLOFOP-METHYL 73 12030106 DICROTOPHOS 679 12030106 DIMETHOATE 1310 12030106 DISULFOTON 16806 12030106 FLUAZIFOP-P-BUTYL 66 12030106 GLYPHOSATE 3 12030106 MALATHION 227 12030106 MANCOZEB 956 12030106 METHYL PARATHION 3138 12030106 METOLACHLOR 1323 12030106 METSULFURON-METHYL 9 12030106 PENDIMETHALIN 1857 12030106 PROMETRYN 1070 12030106 PROPICONAZOLE 93 12030106 SETHOXYDIM 2 12030106 TERBUFOS 13341 12030106 TRIADIMEFON 149 12030106 TRIFLURALIN 1172 12030107 2,4-D + DICAMBA 4329 12030107 ATRAZINE 119 12030107 BENOMYL 4 12030107 CARBARYL 2469 12030107 CHLOROTHALONIL 70 12030107 CHLORSULFURON 24 12030107 CHLORTHAL DIMETHYL 210 12030107 DIAZINON 39 12030107 DIMETHOATE 447 12030107 DISULFOTON 557 12030107 DIURON 750 12030107 DSMA 1237 12030107 ENDOSULFAN 76 12030107 FENVALERATE 37 12030107 FLUAZIFOP-P-BUTYL 567 12030107 GLYPHOSATE 218 12030107 MANCOZEB 52 12030107 METHYL PARATHION 325 12030107 METSULFURON-METHYL 3 71 ------- Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and pesticide in 1990.* (continued) TOTAL APPLIED HU NUMBER PESTICIDE ( lbs.) 12030107 OXYDEMETON-METHYL 40 12030107 PARATHION 65 12030107 PENDIMETHALIN 850 12030107 TRICLOPYR + 2,4-D 892 12030107 TRIFLURALIN 63 12030108 2,4-D ACID 26178 12030108 ACEPHATE 5878 12030108 ALACHLOR 425 12030108 ALDICARB 9373 12030108 ARSENIC ACID 25151 12030108 ATRAZINE 5779 12030108 AZINPHOS-METHYL 300 12030108 BENOMYL 60 12030108 BROMOXYNIL 83 12030108 BUTIFOS 12733 12030108 CARBARYL 2421 12030108 CARBOFURAN 4536 12030108 CHLORPYRIFOS 42 12030108 CHLORSULFURON 157 12030108 CYHALOTHRIN 25 12030108 CYPERMETHRIN 300 12030108 DICAMBA 1031 12030108 DICLOFOP-METHYL 34 12030108 DICROTOPHOS 2473 12030108 DIMETHOATE 2506 12030108 DISULFOTON 6492 12030108 DIURON 1542 12030108 ESFENVALERATE 170 12030108 FENVALERATE 259 12030108 FLUAZIFOP-P-BUTYL 11056 12030108 GLYPHOSATE 8746 12030108 MALATHION 106 12030108 MANCOZEB 622 12030108 METHOMYL 1827 12030108 METHYL PARATHION 4294 12030108 METOLACHLOR 4499 12030108 METOLACHLOR + ATRAZINE 16179 12030108 METSULFURON-METHYL 1 12030108 MONOCROTOPHOS 637 12030108 MONOSODIUM METHANEARSONATE 431 12030108 PARAQUAT 181 12030108 PARATHION 17865 12030108 PENDIMETHALIN 514 12030108 PETROLEUM OIL 63 12030108 PHOSALONE 1500 12030108 PROMETRYN 28783 12030108 PROPAR6ITE 3483 12030108 PROPICONAZOLE 1225 12030108 TERBUFOS 7560 12030108 THIDIAZURON 566 12030108 THIODICARB 1748 72 ------- Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and pesticide in 1990.* (continued) TOTAL APPLIED HU NUMBER PESTICIDE (lbs.) 12030108 TRIADIMEFON 1145 12030108 TRIFLURALIN 14730 12030108 TRIPHENYLTIN 32 12030109 2,4-D ACID 8567 12030109 ACEPHATE 4048 12030109 ALACHLOR 4017 12030109 ALDICARB 7029 12030109 ARSENIC ACID 17934 12030109 ATRAZINE 26136 12030109 AZINPHOS-METHYL 347 12030109 BIFENTHRIN 101 12030109 BROMOXYNIL 499 12030109 BUTIFOS 4187 12030109 CARBARYL 875 12030109 CARBOFURAN 2273 12030109 CHLORPYRIFOS 5893 12030109 CHLORSULFURON 429 12030109 CYANAZINE 808 12030109 CYFLUTHRIN 19 12030109 CYHALOTHRIN 37 12030109 CYPERMETHRIN 114 12030109 DICAMBA 1883 12030109 DICLOFOP-METHYL 209 12030109 DICROTOPHOS 4016 12030109 DIMETHOATE 4429 12030109 DISULFOTON 14353 12030109 DIURON 685 12030109 ESFENVALERATE 79 12030109 ETHEPHON 2597 12030109 FLUAZIFOP-P-BUTYL 12413 12030109 GLYPHOSATE 3472 12030109 MANCOZEB 2132 12030109 METHOMYL 1793 12030109 METHYL PARATHION 9167 12030109 METOLACHLOR 3641 12030109 METOLACHLOR + ATRAZINE 6376 12030109 METSULFURON-METHYL 10 12030109 MONOCROTOPHOS 283 12030109 MONOSODIUM METHANEARSONATE 1064 12030109 OXYDEMETON-METHYL 487 12030109 PARAQUAT 814 12030109 PARATHION 2522 12030109 PENDIMETHALIN 1267 12030109 PHOSALONE 750 12030109 PHOS PHAMIDON 324 12030109 PROFENOFOS 3877 12030109 PROMETRYN 20881 12030109 PROPARGITE 2965 12030109 PROPICONAZOLE 657 12030109 SETHOXYDIM 2174 12030109 TERBUFOS 20538 12030109 THIDIAZURON 595 73 ------- Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and pesticide in 1990.* (continued) TOTAL APPLIED HU NUMBER PESTICIDE (lbs.) 12030109 THIODICARB 5557 12030109 TRIADIMEFON 849 12030109 TRIFLURALIN 7917 12030109 TRIPHENYLTIN 13 12030201 2,4-D ACID 18 12030201 2,4-D + DICAMBA 38901 12030201 ACEPHATE 17 12030201 ALDICARB 46 12030201 ARSENIC ACID 109 12030201 AZINPHOS-METHYL 15 12030201 BENOMYL 132 12030201 BUTIFOS 35 12030201 CARBARYL 6387 12030201 CHLOROTHALONIL 11 12030201 CHLORPYRIFOS 42 12030201 CHLORSULFURON 1 12030201 CYHALOTHRIN 0 12030201 CYPERMETHRIN 2 12030201 DICROTOPHOS 20 12030201 DIMETHOATE 6 12030201 DISULFOTON 62 12030201 DIURON 16 12030201 ESFENVALERATE 1 12030201 FLUAZIFOP-P-BUTYL 64 12030201 GLYPHOSATE 29 12030201 MALATHION 5932 12030201 METHOMYL 20 12030201 METHYL PARATHION 49 12030201 METOLACHLOR 49 12030201 MONOCROTOPHOS 6 12030201 MONOSODIUM METHANEARSONATE 4 12030201 PARAQUAT 1 12030201 PARATHION 39 12030201 PENDIMETHALIN 5 12030201 PETROLEUM OIL 138 12030201 PHOSALONE 37 12030201 PROMETRYN 60 12030201 PROPARGITE 9 12030201 PROPICONAZOLE 7 12030201 THIDIAZURON 5 12030201 THIODICARB 19 12030201 TRIADIMEFON 3 12030201 TRIFLURALIN 60 12030201 TRIPHENYLTIN 5 12030202 2,4-D + DICAMBA 9442 12030202 ACIFLUORFEN 19 12030202 ALACHLOR 15 12030202 BENOMYL 123 12030202 BENTAZON 57 12030202 CARBARYL 778 12030202 CARBOFURAN 40 74 ------- Appendix D. Annual total agricultural pesticide applied in the Trinity River Basin by hydrologic unit (HU) and pesticide in 1990.* (continued) TOTAL APPLIED HU NUMBER PESTICIDE (lbs.) 12030202 CHLOROTHALONIL 34 12030202 CLOPYRALID 159 12030202 DIAZINON 150 12030202 DIMETHOATE 177 12030202 FLUAZIFOP-P-BUTYL 18 12030202 FOMESAFEN 11 12030202 GLYPHOSATE 23 12030202 IMAZAQUIN ACID 1 12030202 IPRODIONE 14 12030202 LINURON 6 12030202 MALATHION 101 12030202 MANCOZEB 72 12030202 METHYL PARATHION 78 12030202 METOLACHLOR 65 12030202 METRIBUZIN 6 12030202 MOLINATE 511 12030202 PENDIMETHALIN 28 12030202 PERMETHRIN 6 12030202 PROPANIL 1460 12030202 PROPICONAZOLE 10 12030202 SETHOXYDIM 3 12030202 SULPROFOS 787 12030202 THIOBENCARB 192 12030202 TRIADIMEFON 7 12030202 TRIFLURALIN 675 12030203 2,4-D ACID 536 12030203 ACIFLUORFEN 2910 12030203 ALACHLOR + TRIFLURALI 1792 12030203 BENOMYL 1062 12030203 BENTAZON 6724 12030203 CARBARYL 12076 12030203 CARBOFURAN 2911 12030203 FENVALERATE 103 12030203 FLUAZIFOP-P-BUTYL 4566 12030203 FOMESAFEN 2718 12030203 IMAZAQUIN ACID 253 12030203 IPRODIONE 1062 12030203 LINURON 1510 12030203 METHYL PARATHION 4252 12030203 MOLINATE + PROPANIL 29113 12030203 PENDIMETHALIN 492 12030203 PROPANIL 95490 12030203 PROPICONAZOLE 793 12030203 THIOBENCARB 13304 * Values were calculated from acre treatment estimates from Holloway et al. (1990) and mean application rates from product labels. Picloram and 2,4-D combinations for brush control in pastures were not included because rates were dependent on brush intensity rather than per acre. Numbers were truncated to nearest pound. 75 ------- Appendix E. LCS0 for fish of agricultural pesticides used in EPA Region VI (Pesticides were ranked from most toxic to least toxic).* LC50 ^C50 PESTICIDE 50 fua/1. 96 hr.) PESTICIDE 50 fua/1. 96 hr.) ETHALFLURALIN 0.01 PROPANIL 3700.00 LAMBDACYHALOTHRIN 0.21 2,4-DB 4000.00 FENOXAPROP ETHYL 0.31 MANCOZEB 4000.00 BIFENTHRIN 0.35 ALACHLOR 4300.00 ENDOSULFAN 1.20 GLYPHOSATE 5000.00 CYFLUTHRIN 1.50 DICROTOPHOS 6300.00 QUIZALOFOP ETHYL 1.63 DIURON 7400.00 LINDANE 1.70 THIOPHANATE-METHYL 7800.00 PERMETHRIN 1.80 METOLACHLOR 8000.00 CYPERMETHRIN 2.00 VERNOLATE 8400.00 METHAZOLE 3.14 MALATHION 8650.00 DIETHATYL ETHYL 3.34 QUINTOZENE 9000.00 CYCLOATE 3.85 NICOSULFURON 10000.00 TRALOMETHRIN 4.30 OXYDEMETON-METHYL 10000.00 OXAMYL 5.60 PROMETRYN 10000.00 ETRIDIAZOLE 7.50 SULPROFOS 11000.00 ZIRAM 7.50 BROMOXYNIL 13800.00 CHLORPYRIFOS 10.00 PARAQUAT 15000.00 FLUAZIFOP-P-BUTYL 11.30 CYANAZINE 16000.00 TERBUFOS 13.30 LINURON 16000.00 PARATHION 20.00 TRIADIMEFON 17400.00 FURORE 27.40 CARBARYL 21300.00 NAPROPAMIDE 30.00 MONOCROTOPHOS 23000.00 SETHOXYDIM 30.00 MOLINATE 29000.00 SULFUR 30.00 PICLORAM SALT 29200.00 CLOMAZONE 34.00 PROPICONAZOLE 30000.00 PROPARGITE 35.00 DICAMBA SALT 40000.00 HEVINPHOS 41.00 METHAMIDOPHOS 46000.00 CHLOROTHALONIL 62.00 ACEPHATE 50000.00 BENEFIN 64.00 ACIFLUORFEN 62000.00 PHOSMET 70.00 ARSENIC ACID 64000.00 DISULFOTON 70.30 BROMACIL 71000.00 CYROMAZINE 87.10 METRIBUZIN 80000.00 DIAZINON 90.00 FLUOMETURON 80300.00 AZINPHOS-METHYL 100.00 CHLORIMURON ETHYL 100000.00 CAPTAN 141.00 METALAXYL 100000.00 CARBOFURAN 150.00 CLOPYRALID 125400.00 TRIFLURALIN 160.00 TRICLOPYR 148000.00 COPPER HYDROXIDE 180.00 BENSULFURON 150000.00 PROFENOFOS 300.00 METSULFURON-METHYL 150000.00 NAPTALAM 354.00 ETHEPHON 180000.00 PENDIMETHALIN 420.00 2,4-D ACID 263000.00 PHOSALONE 500.00 CHLORTHAL DIMETHYL 320000.00 METHOMYL 800.00 ENDOTHALL 320000.00 METHYL PARATHION 800.00 IMAZAQUIN ACID 410000.00 ATRAZINE 1000.00 BENTAZON 616000.00 BENSULIDE 1000.00 DSMA 1000000.00 DIMETHOATE 1000.00 MONOSODIUM METHANEARSONATE ! 1000000.00 OXYFLUORFEN 1000.00 PHOSPHAMIDON 1000000.00 THIOBENCARB 1400.00 THIDIAZURON 1000000.00 THIODICARB 1400.00 CHLORSULFURON 3000000.00 ALDICARB 1500.00 FOMESAFEN 6030000.00 BENOMYL 2000.00 DICLOFOP-METHYL 10000000.00 IPRODIONE 2250.00 ESFENVALERATE 10000000.00 ORYZALIN 2880.00 PETROLEUM OIL 10000000.00 * Chemicals listed were reported for EPA Region VI by USDA (1992, 1993a, b) or for hydrologic units in the Trinity River Basin by Holloway et al. (1990). Data taken from the Royal Society of Chemists (1991) and EXTOXNET (1989). A few values were included from AQUIRE (1993). Values selected were from bluegills in nearly all cases. A few values from other fish species were selected when data fro« bluegills was not available. Values were not available for BUTIFOS, FENVALERATE, SODIUM CHLORATE, and TRIPHENYLTIN. 76 ------- Appendix F. Oral LDS0 values for rats of agricultural pesticides used in EPA Region VI (Pesticides were ranked from most toxic to least toxic).* ORAL LD50 ORAL LD50 PESTICIDE (ma/kg> PESTICIDE (mg/kql ALDICARB 1.00 BENTAZON 1100.00 TERBUFOS 1.30 METRIBUZIN 1100.00 CARBOFURAN 2.00 PENDIMETHALIN 1150.00 PARATHION 2.00 METOLACHLOR 1200.00 MEVINPHOS 3.00 QUINTOZENE 1200.00 AZINPHOS-METHYL 4.40 TRALOMETHRIN 1250.00 OXAMYL 5.40 ACIFLUORFEN 1300.00 METHYL PARATHION 6.00 THIOBENCARB 1300.00 DISULFOTON 7.00 PROPICONAZOLE 1310.00 MONOCROTOPHOS 8.00 ZIRAM 1400.00 DICROTOPHOS 17.00 LINURON 1500.00 METHOMYL 17.00 PERMETHRIN 1500.00 PHOSPHAMIDON 17.00 VERNOLATE 1500.00 ENDOSULFAN 18.00 FOMESAFEN 1625.00 METHAMIDOPHOS 20.00 QUIZALOFOP ETHYL 1670.00 PARAQUAT 20.00 DSMA 1800.00 ENDOTHALL 51.00 2,4-DB 2000.00 ARSENIC ACID 52.00 CYCLOATE 2000.00 LAMBDACYHALOTHRIN 79.00 CLOMAZONE 2077.00 CHLORPYRIFOS 96.00 DIETHATYL ETHYL 2300.00 LINDANE 105.00 FENOXAPROP ETHYL 2357.00 PHOSMET 113.00 ATRAZINE 2475.00 OXYDEMETON-METHYL 125.00 METHAZOLE 2501.00 PHOSALONE 147.00 PICLORAM SALT 2898.00 CYANAZINE 149.00 CHLORTHAL DIMETHYL 3000.00 SULPROFOS 154.00 CHLORSULFURON 3053.00 THIODICARB 166.00 SETHOXYDIM 3200.00 BROMOXYNIL 190.00 IMAZAQUIN ACID 3328.00 DIMETHOATE 215.00 CYROMAZINE 3387.00 PROPARGITE 220.00 FLUAZIFOP-P-BUTYL 3680.00 CARBARYL 250.00 ETHEPHON 3740.00 CYPERMETHRIN 250.00 PROMETRYN 3750.00 BENSULIDE 271.00 CHLORIMURON ETHYL 4000.00 PETROLEUM OIL 316.00 CLOPYRALID 4300.00 PROFENOFOS 358.00 GLYPHOSATE 4300.00 2,4-D ACID 375.00 MANCOZEB 4500.00 BIFENTHRIN 375.00 SODIUM CHLORATE 4950.00 FENVALERATE 451.00 BENSULFURON 5000.00 ESFENVALERATE 458.00 METSULFURON-METHYL 5000.00 MALATHION 480.00 NAPROPAMIDE 5000.00 MOLINATE 501.00 NICOSULFURON 5000.00 PROPANIL 560.00 OXYFLUORFEN 5000.00 DICLOFOP-METHYL 563.00 SULFUR 5000.00 TRIADIMEFON 568.00 BROMACIL 5200.00 METALAXYL 669.00 THIOPHANATE-METHYL 7500.00 TRICLOPYR 713.00 FLUOMETURON 7658.00 DIAZINON 720.00 NAPTALAM 8200.00 MONOSODIUM METHANEARSONATE 900.00 CAPTAN 8400.00 ALACHLOR 930.00 IPRODIONE 8900.00 ACEPHATE 945.00 BENEFIN 10000.00 COPPER HYDROXIDE 1000.00 BENOMYL 10000.00 THIDIAZURON 1000.00 CHLOROTHALONIL 10000.00 CYFLUTHRIN 1015.00 ETHALFLURALIN 10000.00 DIURON 1017.00 ORYZALIN 10000.00 DICAMBA SALT 1040.00 TRIFLURALIN 10000.00 ETRIDIAZOLE 1077.00 * Chemicals listed were reported for EPA Region VI by USDA (1992, 1993a, b) or for hydrologic units in the Trinity River Basin by Holloway et al. (1990). Data were taken from MSDS sheets, Crop Protection Chemicals Reference (1991), and Farm Chemicals Handbook (1992). Lower values were selected when a range was reported. Minimum values were reported when a > sign is used. Values for male rats were reported when data was available by sex. No data was available for BUTIFOS, FURORE, and TRIPHENYLTIN. 77 ------- Appendix G. Field half life of agricultural pesticides used in the EPA Region VI (Pesticides were ranked from most persistent to least persistent).* Half Life Half Life PESTICIDE " (days) PESTICIDE (days) ARSENIC ACID 10000.0 CYCLOATE 30.0 PARAQUAT 1000.0 CHLORPYRIFOS 30.0 MONOSODIUM METHANEARSONATE 1000.0 CHLOROTHALONIL 30.0 LINDANE 400.0 ALDICARB 30.0 CYROMAZINE 150.0 TRALOMETHRIN 27.0 SULPROFOS 140.0 TRIADIMEFON 26.0 BENSULIDE 120.0 BIFENTHRIN 26.0 PROPICONAZOLE 110.0 CLOMAZONE 24.0 ETRIDIAZOLE 103.0 THIOBENCARB 21.0 FOMESAFEN 100.0 PHOSALONE 21.0 CHLORTHAL DIMETHYL 100.0 QUINTOZENE 21.0 PICLORAM SALT 90.0 MOLINATE 21.0 PENDIMETHALIN 90.0 ORYZALIN 20.0 METOLACHLOR 90.0 DICROTOPHOS 20.0 DIURON 90.0 BENTAZON 20.0 FLUOMETURON 85.0 PHOSMET 19.0 TRIPHENYLTIN 75.0 PHOS PHAMIDON 17.0 NAPROPAMIDE 70.0 FLUAZIFOP-P-BUTYL 15.0 METALAXYL 70.0 ALACHLOR 15.0 MANCOZEB 70.0 PARATHION 14.0 BENOMYL 67.0 NAPTALAM 14.0 TRIFLURALIN 60.0 METHAZOLE 14.0 QUIZALOFOP ETHYL 60.0 IPRODIONE 14.0 PROMETRYN 60.0 DICAMBA SALT 14.0 LINURON 60.0 CYANAZINE 14.0 IMAZAQUIN ACID 60.0 ACIFLUORFEN 14.0 ETHALFLURALIN 60.0 VERNOLATE 12.0 BROMACIL 60.0 THIOPHANATE-METHYL 10.0 ATRAZINE 60.0 THIDIAZURON 10.0 PROPARGITE 56.0 PETROLEUM OIL 10.0 ENDOSULFAN 50.0 OXYDEMETON-METHYL 10.0 CARBOFURAN 50.0 ETHEPHON 10.0 GLYPHOSATE 47.0 CARBARYL 10.0 TRICLOPYR 46.0 AZINPHOS-METHYL 10.0 METRIBUZIN 40.0 2,4-DB 10.0 DIAZINON 40.0 2,4-D ACID 10.0 CLOPYRALID 40.0 FENOXAPROP ETHYL 9.0 CHLORSULFURON 40.0 PROFENOFOS 8.0 CHLORIMURON ETHYL 40.0 THIODICARB 7.0 BENEFIN 40.0 ENDOTHALL 7.0 OXYFLUORFEN 35.0 DIMETHOATE 7.0 FENVALERATE 35.0 BROMOXYNIL 7.0 ESFENVALERATE 35.0 METHAMIDOPHOS 6.0 PERMETHRIN 30.0 TERBUFOS 5.0 MONOCROTOPHOS 30.0 SETHOXYDIM 5.0 METSULFURON-METHYL 30.0 METHYL PARATHION 5.0 METHOMYL 30.0 BENSULFURON 5.0 LAMBDACYHALOTHRIN 30.0 OXAMYL 4.0 DISULFOTON 30.0 MEVINPHOS 3.0 DIETHATYL ETHYL 30.0 ACEPHATE 3.0 DICLOFOP-METHYL 30.0 CAPTAN 2.5 CYPERMETHRIN 30.0 PROPANIL 1.0 CYFLUTHRIN 30.0 MALATHION 1.0 * Chemicals listed were reported for EPA Region VI by USDA (1992, 1993a, b) or for hydrologic units in the Trinity River Basin by Holloway et al. (1990). Data were selected values taken from the Wauchope et al. (1992). Values were not available for BUTIFOS, COPPER HYDROXIDE, DSMA, FURORE, NICOSULFURON, SODIUM CHLORATE, SULFUR, and ZIRAM. 78 ------- Appendix H. Solubility in water of agricultural pesticides used in the EPA Region VI (Pesticides were ranked from most soluble to least soluble).* SOLUBILITY SOLUBILITY PESTICIDE (Domi PESTICIDE (vvm) BENTAZON 2300000.00 TRIADIMEFON 71.50 MONOSODIUM METHANEARSONATE 1400000.00 TRALOMETHRIN 70.00 ETHEPHON 1239000.00 METHYL PARATHION 60.00 PHOSPHAMIDON 1000000.00 DIAZINON 60.00 OXYDEMETON-METHYL 1000000.00 ETRIDIAZOLE 50.00 MONOCROTOPHOS 1000000.00 DIURON 42.00 METHAMIDOPHOS 1000000.00 PROMETRYN 33.00 DICROTOPHOS 1000000.00 ATRAZINE 33.00 GLYPHOSATE 900000.00 AZINPHOS-METHYL 29.00 ACEPHATE 818000.00 THIOBENCARB 28.00 SODIUM CHLORATE 790000.00 PROFENOFOS 28.00 2,4-DB 709000.00 NICOSULFURON 28.00 FOMESAFEN 700000.00 DISULFOTON 25.00 PARAQUAT 620000.00 PARATHION 24.00 MEVINPHOS 600000.00 TRICLOPYR 23.00 DICAMBA SALT 400000.00 THIDIAZURON 20.00 CLOPYRALID 300000.00 PHOSMET 20.00 OXAMYL 282000.00 THIODICARB 19.10 DSMA 279000.00 IPRODIONE 13.90 ACIFLUORFEN " 250000.00 FENVALERATE 0.002 NAPTALAM 231000.00 LINDANE 7.00 PICLORAM SALT 200000.00 MANCOZEB 6.00 IMAZAQUIN ACID 160000.00 BENSULIDE 5.60 CYROMAZINE 136000.00 CAPTAN 5.10 ENDOTHALL 100000.00 TERBUFOS 5.00 ZIRAM 65000.00 THIOPHANATE-METHYL 3.50 METHOMYL 58000.00 PHOSALONE 3.00 DIMETHOATE 39800.00 COPPER HYDROXIDE 2.90 ARSENIC ACID 17000.00 ORYZALIN 2.80 METSULFURON-METHYL 9500.00 FLUAZIFOP-P-BUTYL 2.00 METALAXYL 8400.00 BENOMYL 2.00 CHLORSULFURON 7000.00 METHAZOLE 1.50 ALDICARB 6000.00 TRIPHENYLTIN 1.00 SETHOXYDIM 4390.00 FENOXAPROP ETHYL 0.80 METRIBUZIN 1220.00 DICLOFOP-METHYL 0.80 CHLORIMURON ETHYL 1200.00 CHLOROTHALONIL 0.60 CLOMAZONE 1100.00 PROPARGITE 0.50 MOLINATE 970.00 CHLORTHAL DIMETHYL 0.50 2,4-D ACID 890.00 QUINTOZENE 0.44 BROMACIL 700.00 CHLORPYRIFOS 0.40 METOLACHLOR 530.00 ENDOSULFAN 0.32 CARBOFURAN 351.00 SULPROFOS 0.31 ALACHLOR 240.00 QUIZALOFOP ETHYL 0.31 PROPANIL 200.00 TRIFLURALIN 0.30 CYANAZINE 170.00 ETHALFLURALIN 0.30 MALATHION 130.00 PENDIMETHALIN 0.28 CARBARYL 120.00 OXYFLUORFEN 0.10 BENSULFURON 120.00 BIFENTHRIN 0.10 PROPICONAZOLE 110.00 BENEFIN 0.10 FLUOMETURON 110.00 BROMOXYNIL 0.08 VERNOLATE 108.00 PERMETHRIN 0.01 DIETHATYL ETHYL 105.00 LAMBDACYHALOTHRIN 0.01 PETROLEUM OIL 100.00 ESFENVALERATE 0.00 CYCLOATE 95.00 CYPERMETHRIN 0.00 LINURON 75.00 CYFLUTHRIN 0.00 NAPROPAMIDE 74.00 * Chemicals listed were reported for EPA Region VI by USDA (1992, 1993a, b) or for hydrologic units in the Trinity River Basin by Holloway et al. (1990). Data were selected values taken from the Wauchope et al. (1992). Values were not available for BUTIFOS, FURORE, and SULFUR. 79 ------- Appendix I. Octanol/water partition coefficients of agricultural pesticides used in EPA Region VI (Pesticides were ranked from most likely to bioaccumulate to least likely to bioaccumulate). PESTICIDE loa Kow PESTICIDE loa Kow CYFLUTHRIN 7.14 ETRIDIAZOLE 2.54 LAMBDACYHALOTHRIN 7.00 CLOMAZONE 2.54 CYPERMETHRIN 6.60 DICAMBA SALT 2.46 ESFENVALERATE 6.22 PROPANIL 2.28 PERMETHRIN 6.10 TERBUFOS 2.22 BIFENTHRIN 6.00 LINURON 2.19 PENDIMETHALIN 5.18 CARBOFURAN 1.98 ETHALFLURALIN 5.11 SETHOXYDIM 1.65 TRIFLURALIN 5.07 METRIBUZIN 1.65 TRALOMETHRIN 5.00 THIDIAZURON 1.43 QUINTOZENE 4.89 MANCOZEB . 1.30 CHLORPYRIFOS 4.70 PHOSPHAMIDON 0.80 DICLOFOP-METHYL 4.58 DIMETHOATE 0.78 OXYFLUORFEN 4.47 ALDICARB 0.70 SULPROFOS 4.26 CHLORTHAL DIMETHYL 0.69 BENSULIDE 4.22 ACIFLUORFEN 0.69 FENOXAPROP ETHYL 4.12 BENSULFURON 0.61 CYCLOATE 4.11 CHLORIMURON ETHYL 0.36 ENDOSULFAN 3.83 CYANAZINE 0.35 BENTAZON 3.81 2,4-D ACID 0.27 PROPARGITE 3.73 PICLORAM SALT 0.25 OXYDEMETON-METHYL 3.73 THIODICARB 0.22 DIETHATYL ETHYL 3.60 IMAZAQUIN ACID 0.14 PARATHION 3.47 CARBARYL 0.14 PROMETRYN 3.46 METHOMYL 0.11 METOLACHLOR 3.45 CHLORSULFURON 0.04 THIOBENCARB 3.42 MEVINPHOS 0.02 NAPROPAMIDE 3.36 PROPICONAZOLE 0.00 IPRODIONE 3.10 PROFENOFOS 0.00 DIAZINON 3.01 PETROLEUM OIL 0.00 METHYL PARATHION 2.97 PARAQUAT 0.00 PHOSMET 2.91 ETHEPHON 0.00 MOLINATE 2.88 BROMOXYNIL 0.00 CHLOROTHALONIL 2.88 ARSENIC ACID 0.00 DIURON 2.81 MONOCROTOPHOS -0.15 CAPTAN 2.79 DICROTOPHOS -0.49 METALAXYL 2.77 BENOMYL -0.52 MALATHION 2.77 ENDOTHALL -0.87 ATRAZINE 2.68 ACEPHATE -0.89 ALACHLOR 2.64 METSULFURON-METHYL -1.85 AZINPHOS-METHYL 2.62 GLYPHOSATE -3.25 METHAZOLE 2.59 * Chemicals listed were reported for EPA Region VI by USDA (1992, 1993a, b) or for hydrologic units in the Trinity River Basin by Holloway et al. (1990). Kow values were taken from-the AQUIRE-QSAR. Values were not available for 2,4-DB, BENEFIN, BROMACIL, CLOPYRALID, COPPER HYDROXIDE, CYROMAZINE, DISULFOTON, DSMA, FENVALERATE, FLUAZIFOP-P-BUTYL, FLUOMETURON, FOMESAFEN, FURORE, LINDANE, METHAMIDOPHOS, MONOSODIUM METHANEARSONATE, NAPTALAM, NICOSULFURON, ORYZALIN, OXAMYL, PHOSALONE, QUIZALOFOP ETHYL, SODIUM CHLORATE, SULFUR, THIOPHANATE-METHYL, TRIADIMEFON, TRICLOPYR, TRIPHENYLTIN, VERNOLATE, and ZIRAM. 80 ------- Appendix J. Land area by state in EPA Region VI and land area by hydrologic unit (HU) for the Trinity River Basin in Texas.* State Acres AR 33,328,000 LA 27,882,240 NM 77,672,960 OK 43,954,560 TX 167,624,960 HU number 12030101 12030102 12030103 12030104 12030105 12030106 12030107 12030108 12030109 12030201 12030202 12030203 12040201 12040202 12040203 Total Acres 1,315,683 985,137 1,182,639 506,284 855,634 839,060 687,095 646,402 667,461 1,406,590 2,171,425 565,759 460,373 400,715 145,366 12,835,623 * Land area by State was taken from The Council of State Governments, 1992-1993, The Book of the States, Volume 29, Lexington, Kentucky, 707 pp. Land area by hydrologic units was estimated using ARC/INFO software and data from the TIGER files with Digital Line Graph data. 81 ------- Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide.* HU PESTICIDE NHRCM 12030101 BENTAZON .000064 12030101 DIMETHOATE .000051 12030101 METOLACHLOR .000044 12030101 METHYL PARATHION .000037 12030101 ATRAZINE .000028 12030101 MANCOZEB .000018 12030101 2,4-DB .000016 12030101 CARBARYL .000014 12030101 SETHOXYDIM .000013 12030101 GLYPHOSATE .000012 12030101 AZINPHOS-METHYL .000008 12030101 CHLORSULFURON .000008 12030101 PARATHION .000006 12030101 TRIADIMEFON .000004 12030101 CHLORPYRIFOS .000002 12030101 METSULFURON-METHYL .000001 12030101 PROPICONAZOLE .000001 12030101 PHOSALONE .000001 12030101 PHOSMET .000000 12030101 CAPTAN .000000 12030101 BENOMYL .000000 12030101 CHLOROTHALONIL .000000 12030101 CYPERMETHRIN .000000 12030101 DISULFOTON .000000 12030101 ESFENVALERATE .000000 12030101 MALATHION .000000 12030101 ORYZALIN .000000 12030101 PETROLEUM OIL .000000 12030101 TRIFLURALIN .000000 12030101 2,4-D ACID NA 12030101 COPPER HYDROXIDE NA 12030101 DICAMBA NA 12030101 TRIPHENYLTIN NA 12030102 GLYPHOSATE .000141 12030102 DIMETHOATE .000083 12030102 CARBARYL .000056 12030102 ATRAZINE .000047 12030102 DIAZINON .000032 12030102 METALAXYL .000027 12030102 DISULFOTON .000026 12030102 2,4-DB .000022 12030102 BENSULIDE .000017 12030102 MANCOZEB .000016 12030102 CARBOFURAN .000013 12030102 BENTAZON .000011 12030102 PHOSALONE .000011 12030102 CHLORSULFURON .000010 12030102 CHLORPYRIFOS .000009 12030102 TERBUFOS .000008 12030102 VERNOLATE .000006 12030102 TRIADIMEFON .000004 12030102 MEVINPHOS .000003 82 ------- Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCM 12030102 PROPICONAZOLE .000001 12030102 METOLACHLOR .000001 12030102 METHYL PARATHION .000001 12030102 AZINPHOS-METHYL .000000 12030102 PHOSMET .000000 12030102 CAPTAN .000000 12030102 BROMOXYNIL .000000 12030102 FLUAZIFOP-P-BUTYL .000000 12030102 METSULFURON-METHYL .000000 12030102 BENOMYL .000000 12030102 CHLOROTHALONIL .000000 12030102 CYPERMETHRIN .000000 12030102 DICLOFOP-METHYL .000000 12030102 MALATHION .000000 12030102 ORYZALIN .000000 12030102 PETROLEUM OIL .000000 12030102 TRIFLURALIN .000000 12030102 2,4-D ACID NA 12030102 COPPER HYDROXIDE NA 12030102 DICAMBA NA 12030102 FENVALERATE NA 12030102 SULPHUR NA 12030102 TRIPHENYLTIN NA 12030103 ARSENIC ACID .001130 12030103 DISULFOTON .000526 12030103 DICROTOPHOS .000377 12030103 ALACHLOR .000326 12030103 ALDICARB .000282 12030103 DIMETHOATE .000211 12030103 ETHEPHON .000165 12030103 SETHOXYDIM .000165 12030103 METHYL PARATHION .000133 12030103 ATRAZINE .000131 12030103 ACEPHATE .000113 12030103 METOLACHLOR .000101 12030103 CYANAZINE .000075 12030103 1 2,4-DB .000068 12030103 QUINTOZENE .000068 12030103 PENDIMETHALIN .000067 12030103 CHLORSULFURON .000064 12030103 PARATHION .000062 12030103 BENTAZON .000061 12030103 CARBARYL .000056 12030103 DIURON .000051 12030103 PROMETRYN .000043 12030103 CARBOFURAN .000037 12030103 PROPICONAZOLE .000035 12030103 TRIADIMEFON .000033 12030103 PARAQUAT .000023 12030103 MANCOZEB .000019 12030103 FLUOMETURON .000018 12030103 TERBUFOS .000018 83 ------- Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCM 12030103 THIODICARB .000011 12030103 BROMOXYNIL .000009 12030103 ACIFLUORFEN .000006 12030103 METSULFURON-METHYL .000003 12030103 ENDOTHALL .000002 12030103 GLYPHOSATE .000002 12030103 FLUAZIFOP-P-BUTYL .000001 12030103 THIDIAZURON .000000 12030103 BENOMYL .000000 12030103 CHLOROTHALONIL .000000 12030103 DICLOFOP-METHYL .000000 12030103 ESFENVALERATE .000000 12030103 ORYZALIN .000000 12030103 TRIFLURALIN .000000 12030103 2,4-D ACID NA 12030103 CYHALOTHRIN NA 12030103 DICAMBA NA 12030103 FENVALERATE NA 12030103 MEPIQUAT NA 12030104 ARSENIC ACID .000681 12030104 DISULFOTON .000257 12030104 SETHOXYDIM .000110 12030104 METHYL PARATHION .000110 12030104 ETHEPHON .000099 12030104 ALDICARB .000094 12030104 DICROTOPHOS .000093 12030104 DIMETHOATE .000066 12030104 ACEPHATE .000054 12030104 MANCOZEB .000046 12030104 ATRAZINE .000038 12030104 CYANAZINE .000033 12030104 DIURON .000031 12030104 TRIADIMEFON .000022 12030104 CARBARYL .000018 12030104 CHLORSULFURON .000017 12030104 PARAQUAT .000013 12030104 PENDIMETHALIN .000012 12030104 PROPICONAZOLE .000011 12030104 CHLORPYRIFOS .000010 12030104 THIODICARB .000007 12030104 BROMOXYNIL .000004 12030104 FLUOMETURON .000002 12030104 ENDOTHALL .000001 12030104 METSULFURON-METHYL .000001 12030104 FLUAZIFOP-P-BUTYL .000001 12030104 THIDIAZURON .000000 12030104 CHLOROTHALONIL .000000 12030104 DICLOFOP-METHYL .000000 12030104 ESFENVALERATE .000000 12030104 ORYZALIN .000000 12030104 TRIFLURALIN .000000 12030104 2,4-D ACID NA 84 ------- Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCM 12030104 CYHALOTHRIN NA 12030104 DICAMBA NA 12030104 FENVALERATE NA 12030104 MEPIQUAT NA 12030105 ARSENIC ACID .007243 12030105 DICROTOPHOS .001078 12030105 GLYPHOSATE .000971 12030105 ATRAZINE .000966 12030105 PROMETRYN .000840 12030105 ALDICARB .000745 12030105 HONOSODIUH METHANEARSONATE .000664 12030105 ACEPHATE .000648 12030105 ETHEPHON .000598 12030105 PARAQUAT .000454 12030105 METOLACHLOR .000441 12030105 DISULFOTON .000355 12030105 TERBUFOS .000323 12030105 METHOMYL .000261 12030105 METHYL PARATHION .000246 12030105 FLUAZIFOP-P-BUTYL .000211 12030105 ALACHLOR .000207 12030105 DIMETHOATE .000188 12030105 CARBOFURAN .000185 12030105 SETHOXYDIM .000140 12030105 THIODICARB .000138 12030105 OXYDEMETON-METHYL .000118 12030105 PROFENOFOS .000109 12030105 PHOS PHAMIDON .000086 12030105 MONOCROTOPHOS .000073 12030105 CHLORPYRIFOS .000065 12030105 PROPARGITE .000055 12030105 CARBARYL .000034 12030105 MANCOZEB .000031 12030105 DIURON .000029 12030105 CYANAZINE .000025 12030105 PENDIMETHALIN .000022 12030105 PARATHION .000018 12030105 PHOSALONE .000016 12030105 CHLORSULFURON .000015 12030105 THIDIAZURON .000015 12030105 PROPICONAZOLE .000015 12030105 TRIADIMEFON .000013 12030105 AZINPHOS-METHYL .000009 12030105 BROMOXYNIL .000002 12030105 BIFENTHRIN .000001 12030105 METSULFURON-METHYL .000000 12030105 CYFLUTHRIN .000000 12030105 CYPERMETHRIN .000000 12030105 DICLOFOP-METHYL .000000 12030105 ESFENVALERATE .000000 12030105 TRIFLURALIN .000000 12030105 2,4-D ACID NA 85 ------- Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCM 12030105 BUTIFOS NA 12030105 CYHALOTHRIN NA 12030105 DICAMBA NA 12030105 TRIPHENYLTIN NA 12030106 ALACHLOR .000878 12030106 DISULFOTON .000632 12030106 ATRAZINE .000366 12030106 TERBUFOS .000245 12030106 DICROTOPHOS .000195 12030106 DIMETHOATE .000156 12030106 METOLACHLOR .000112 12030106 METHYL PARATHION .000094 12030106 CARBARYL .000072 12030106 CARBOFURAN .000072 12030106 PROMETRYN .000044 12030106 CYANAZINE .000037 12030106 PENDIMETHALIN .000034 12030106 KANCOZEB .000028 12030106 CHLORSULFURON .000014 12030106 TRIADIMEFON .000006 12030106 PROPICONAZOLE .000006 12030106 BROMOXYNIL .000001 12030106 GLYPHOSATE .000001 12030106 FLUAZIFOP-P-BUTYL .000001 12030106 METSULFURON-METHYL .000001 12030106 SETHOXYDIM .000000 12030106 DICLOFOP-METHYL .000000 12030106 MALATHION .000000 12030106 TRIFLURALIN .000000 12030106 2,4-D ACID NA 12030106 DICAMBA NA 12030107 CARBARYL .000122 12030107 GLYPHOSATE .000080 12030107 DIMETHOATE .000065 12030107 DIURON .000046 12030107 DISULFOTON .000025 12030107 PENDIMETHALIN .000019 12030107 TRICLOPYR .000014 12030107 FLUAZIFOP-P-BUTYL .000012 12030107 OXYDEMETON-METHYL .000012 12030107 METHYL PARATHION .000012 12030107 ATRAZINE .000006 12030107 CHLORTHAL DIMETHYL .000005 12030107 CHLORSULFURON .000003 12030107 PARATHION .000003 12030107 DIAZINON .000002 12030107 MANCOZEB .000002 12030107 ENDOSULFAN .000002 12030107 METSULFURON-METHYL .000000 12030107 BENOMYL .000000 12030107 CHLOROTHALONIL .000000 86 ------- Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCM 12030107 TRIFLURALIN .000000 12030107 2,4-D ACID NA 12030107 DICAMBA NA 12030107 DSMA NA 12030107 FENVALERATE NA 12030108 ARSENIC ACID .014548 12030108 GLYPHOSATE .003416 12030108 PROMETRYN .001561 12030108 METOLACHLOR .001505 12030108 ALDICARB .001371 12030108 ACEPHATE .001319 12030108 DICROTOPHOS .000925 12030108 PARATHION .000738 12030108 ATRAZINE .000718 12030108 METHOMYL .000421 12030108 CARBOFURAN .000418 12030108 DIMETHOATE .000389 12030108 MONOSODIUM METHANEARSONATE .000367 12030108 DISULFOTON .000317 12030108 MONOCROTOPHOS .000259 12030108 FLUAZIFOP-P-BUTYL .000257 12030108 TERBUFOS .000180 12030108 METHYL PARATHION .000168 12030108 PARAQUAT .000136 12030108 CARBARYL .000127 12030108 DIURON .000102 12030108 PROPICONAZOLE .000102 12030108 PROPARGITE .000088 12030108 TRIADIMEFON .000066 12030108 THIODICARB .000059 12030108 PHOSALONE .000044 12030108 ALACHLOR .000028 12030108 MANCOZEB .000024 12030108 CHLORSULFURON .000022 12030108 THIDIAZURON .000020 12030108 PENDIMETHALIN .000012 12030108 AZINPHOS-METHYL .000012 12030108 BROMOXYNIL .000001 12030108 CHLORPYRIFOS .000001 12030108 METSULFURON-METHYL .000000 12030108 BENOMYL .000000 12030108 CYPERMETHRIN .000000 12030108 DICLOFOP-METHYL .000000 12030108 ESFENVALERATE .000000 12030108 MALATHION .000000 12030108 PETROLEUM OIL .000000 12030108 TRIFLURALIN .000000 12030108 2,4-D ACID NA 12030108 BUTIFOS NA 12030108 CYHALOTHRIN NA 12030108 DICAMBA NA 12030108 FENVALERATE NA 12030108 TRIPHENYLTIN NA 87 ------- Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCM 12030109 ARSENIC ACID .010046 12030109 ATRAZINE .001574 12030109 DICROTOPHOS .001454 12030109 GLYPHOSATE .001314 12030109 PROMETRYN .001096 12030109 ALDICARB .000996 12030109 ACEPHATE .000880 12030109 MONOSODIUM METHANEARSONATE .000875 12030109 METOLACHLOR .000773 12030109 ETHEPHON .000767 12030109 DISULFOTON .000680 12030109 DIMETHOATE .000666 12030109 PARAQUAT .000592 12030109 TERBUFOS .000474 12030109 METHOMYL .000400 12030109 METHYL PARATHION .000348 12030109 FLUAZIFOP-P-BUTYL .000280 12030109 ALACHLOR .000254 12030109 CARBOFURAN .000203 12030109 THIODICARB .000181 12030109 SETHOXYDIM .000180 12030109 OXYDEMETON-METHYL .000152 12030109 PROFENOFOS .000140 12030109 CHLORPYRIFOS .000122 12030109 MONOCROTOPHOS .000112 12030109 PHOSPHAMIDON .000111 12030109 PARATHION .000101 12030109 MANCOZEB .000080 12030109 PROPARGITE .000073 12030109 CHLORSULFURON .000058 12030109 PROPICONAZOLE .000053 12030109 CYANAZINE .000047 12030109 TRIADIMEFON .000047 12030109 CARBARYL .000044 12030109 DIURON .000044 12030109 PENDIMETHALIN .000029 12030109 PHOSALONE .000021 12030109 THIDIAZURON .000020 12030109 AZINPHOS-METHYL .000013 12030109 BROMOXYNIL .000005 12030109 BIFENTHRIN .000001 12030109 METSULFURON-METHYL .000001 12030109 CYFLUTHRIN .000000 12030109 CYPERMETHRIN .000000 12030109 DICLOFOP-METHYL .000000 12030109 ESFENVALERATE .000000 12030109 TRIFLURALIN .000000 12030109 2,4-D ACID NA 12030109 BUTIFOS NA 12030109 CYHALOTHRIN NA 12030109 DICAMBA NA 12030109 TRIPHENYLTIN NA 88 ------- Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCM 12030201 CARBARYL .000154 12030201 ARSENIC ACID .000029 12030201 GLYPHOSATE .000005 12030201 DICROTOPHOS .000003 12030201 ALDICARB .000003 12030201 METOLACHLOR .000002 12030201 METHOMYL .000002 12030201 ACEPHATE .000001 12030201 MONOSODIUM METHANEARSONATE .000001 12030201 PROMETRYN .000001 12030201 DISULFOTON .000001 12030201 MONOCROTOPHOS .000001 12030201 METHYL PARATHION .000000 12030201 PARATHION .000000 12030201 FLUAZIFOP-P-BUTYL .000000 12030201 PARAQUAT .000000 12030201 PHOSALONE .000000 12030201 DIURON .000000 12030201 DIMETHOATE .000000 12030201 CHLORPYRIFOS .000000 12030201 PROPICONAZOLE .000000 12030201 THIODICARB .000000 12030201 AZINPHOS-METHYL .000000 12030201 PROPARGITE .000000 12030201 CHLORSULFURON .000000 12030201 TRIADIMEFON .000000 12030201 THIDIAZURON .000000 12030201 PENDIMETHALIN .000000 12030201 BENOMYL .000000 12030201 CHLOROTHALONIL .000000 12030201 CYPERMETHRIN .000000 12030201 ESFENVALERATE .000000 12030201 MALATHION .000000 12030201 PETROLEUM OIL .000000 12030201 TRIFLURALIN .000000 12030201 2,4-D ACID NA 12030201 BUTIFOS NA 12030201 CAPTAN NA 12030201 CYHALOTHRIN NA 12030201 DICAMBA NA 12030201 TRIPHENYLTIN NA 12030202 CLOPYRALID .000014 12030202 MOLINATE .000014 12030202 CARBARYL .000012 12030202 DIMETHOATE .000008 12030202 BENTAZON .000007 12030202 SULPROFOS .000006 12030202 GLYPHOSATE .000002 12030202 DIAZINON .000002 12030202 THIOBENCARB .000002 89 ------- Appendix K. Normalized hazard rating coefficients emphasizing mobility (NHRCM) for agricultural pesticides in the Trinity River Basin in Texas by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCM 12030202 METOLACHLOR .000002 12030202 ACIFLUORFEN .000001 12030202 FOMESAFEN .000001 12030202 CARBOFURAN .000001 12030202 METHYL PARATHION .000000 12030202 MANCOZEB .000000 12030202 ALACHLOR .000000 12030202 PROPICONAZOLE .000000 12030202 METRIBUZIN .000000 12030202 PENDIMETHALIN .000000 12030202 TRIADIMEFON .000000 12030202 FLUAZIFOP-P-BUTYL .000000 12030202 LINURON .000000 12030202 IPRODIONE .000000 12030202 SETHOXYDIM .000000 12030202 IMAZAQUIN ACID .000000 12030202 PERMETHRIN .000000 12030202 BENOMYL .000000 12030202 CHLOROTHALONIL .000000 12030202 MALATHION .000000 12030202 PROPANIL .000000 12030202 TRIFLURALIN .000000 12030202 2,4-D ACID NA 12030202 DICAMBA NA 12030202 FURORE NA 12030203 BENTAZON .003274 12030203 MOLINATE .001552 12030203 FOMESAFEN .001207 12030203 ACIFLUORFEN .000848 12030203 CARBARYL .000726 12030203 THIOBENCARB .000686 12030203 CARBOFURAN .000306 12030203 METHYL PARATHION .000190 12030203 FLUAZIFOP-P-BUTYL .000121 12030203 LINURON .000117 12030203 ALACHLOR .000115 12030203 IMAZAQUIN ACID .000086 12030203 PROPICONAZOLE .000075 12030203 IPRODIONE .000028 12030203 PENDIMETHALIN .000013 12030203 BENOMYL .000000 12030203 PROPANIL .000000 12030203 TRIFLURALIN .000000 12030203 2,4-D ACID NA 12030203 FENVALERATE NA 12030203 FURORE NA * NA means that one or more of the data elements needed to calculate NHRCM for the pesticide was not available. Picloram and 2,4-D combinations for hay and pasture application were not included because rates were dependent on brush intensity rather than per acre. Pesticides not included in the table had no use reported. Numbers were truncated to six decimal places. 90 ------- Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin by hydrologic unit (HU) and by pesticide.* HU PESTICIDE NHRCB 12030101 METHYL PARATHION .000256 12030101 MANCOZEB .000221 12030101 ATRAZINE .000220 12030101 METOLACHLOR .000194 12030101 DIMETHOATE .000104 12030101 CARBARYL .000098 12030101 AZINPHOS-METHYL .000069 12030101 BENTAZON .000051 12030101 PARATHION .000049 12030101 CHLORPYRIFOS .000042 12030101 SETHOXYDIM .000040 12030101 CHLORSULFURON .000025 12030101 GLYPHOSATE .000014 12030101 PROPICONAZOLE .000009 12030101 METSULFURON-METHYL .000004 12030101 PHOSMET .000001 12030101 CAPTAN .000000 12030101 CYPERMETHRIN .000000 12030101 BENOMYL .000000 12030101 CHLOROTHALONIL .000000 12030101 ESFENVALERATE .000000 12030101 MALATHION .000000 12030101 PETROLEUM OIL .000000 12030101 TRIFLURALIN .000000 12030101 2,4-DB NA 12030101 TRIADIMEFON NA 12030101 PHOSALONE NA 12030101 DISULFOTON NA 12030101 ORYZALIN NA 12030101 2,4-D ACID NA 12030101 COPPER HYDROXIDE NA 12030101 DICAMBA NA 12030101 TRIPHENYLTIN NA 12030102 CARBARYL .000374 12030102 ATRAZINE .000373 12030102 DIAZINON .000221 12030102 MANCOZEB .000189 12030102 BENSULIDE .000177 12030102 DIMETHOATE .000171 12030102 GLYPHOSATE .000170 12030102 CHLORPYRIFOS .000160 12030102 TERBUFOS .000100 12030102 METALAXYL .000069 12030102 CARBOFURAN .000067 12030102 CHLORSULFURON .000030 12030102 PROPICONAZOLE .000013 12030102 METHYL PARATHION .000011 12030102 BENTAZON .000008 12030102 METOLACHLOR .000007 12030102 BROMOXYNIL .000005 12030102 MEVINPHOS .000004 12030102 PHOSMET .000004 12030102 AZINPHOS-METHYL .000003 91 ------- Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCB 12030102 CAPTAN .000002 12030102 CYPERMETHRIN .000000 12030102 METSULFURON-METHYL .000000 12030102 BENOMYL .000000 12030102 CHLOROTHALONIL .000000 12030102 DICLOFOP-METHYL .000000 12030102 MALATHION .000000 12030102 PETROLEUM OIL .000000 12030102 TRIFLURALIN .000000 12030102 DISULFOTON NA 12030102 2,4-DB NA 12030102 PHOSALONE NA 12030102 VERNOLATE NA 12030102 TRIADIMEFON NA 12030102 FLUAZIFOP-P-BUTYL NA 12030102 ORYZALIN NA 12030102 2,4-D ACID NA 12030102 COPPER HYDROXIDE NA 12030102 DICAMBA NA 12030102 FENVALERATE NA 12030102 SULPHUR NA 12030102 TRIPHENYLTIN NA 12030103 ARSENIC ACID .002799 12030103 ALACHLOR .001726 12030103 PENDIMETHALIN .001165 12030103 QUINTOZENE .001116 12030103 ATRAZINE .001034 12030103 METHYL PARATHION .000917 12030103 ALDICARB .000844 12030103 SETHOXYDIM . .000508 12030103 PARATHION .000506 12030103 CYANAZINE .000466 12030103 METOLACHLOR .000440 12030103 DIMETHOATE .000431 12030103 DICROTOPHOS .000419 12030103 DIURON .000386 12030103 CARBARYL .000375 12030103 PROMETRYN .000330 12030103 BROMOXYNIL .000272 12030103 PROPICONAZOLE .000238 12030103 MANCOZEB .000221 12030103 TERBUFOS .000218 12030103 CHLORSULFURON .000189 12030103 CARBOFURAN .000186 12030103 ETHEPHON .000173 12030103 ACEPHATE .000132 12030103 THIODICARB .000112 12030103 BENTAZON .000048 12030103 PARAQUAT .000027 12030103 METSULFURON-METHYL .000009 12030103 ACIFLUORFEN .000009 12030103 ENDOTHALL .000005 12030103 GLYPHOSATE .000003 92 ------- Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCB 12030103 THIDIAZURON .000002 12030103 BENOMYL .000000 12030103 CHLOROTHALONIL .000000 12030103 DICLOFOP-METHYL .000000 12030103 ESFENVALERATE .000000 12030103 TRIFLURALIN .000000 12030103 DISULFOTON NA 12030103 2,4-DB NA 12030103 TRIADIMEFON NA 12030103 FLUOMETURON NA 12030103 FLUAZIFOP-P-BUTYL NA 12030103 ORYZALIN NA 12030103 2,4-D ACID NA 12030103 CYHALOTHRIN NA 12030103 DICAMBA NA 12030103 FENVALERATE NA 12030103 MEPIQUAT NA 12030104 ARSENIC ACID .001686 12030104 METHYL PARATHION .000758 12030104 MANCOZEB .000544 12030104 SETHOXYDIM .000340 12030104 ATRAZINE .000305 12030104 ALDICARB .000282 12030104 DIURON .000232 12030104 PENDIMETHALIN .000220 12030104 CYANAZINE .000203 12030104 CHLORPYRIFOS .000171 12030104 DIMETHOATE .000135 12030104 BROMOXYNIL .000131 12030104 CARBARYL .000122 12030104 ETHEPHON .000104 12030104 DICROTOPHOS .000104 12030104 PROPICONAZOLE .000076 12030104 THIODICARB .000067 12030104 ACEPHATE .000063 12030104 CHLORSULFURON .000051 12030104 PARAQUAT .000016 12030104 METSULFURON-METHYL .000003 12030104 ENDOTHALL .000003 12030104 THIDIAZURON .000001 12030104 CHLOROTHALONIL .000000 12030104 DICLOFOP-METHYL .000000 12030104 ESFENVALERATE .000000 12030104 TRIFLURALIN .000000 12030104 DISULFOTON NA 12030104 TRIADIMEFON NA 12030104 FLUOMETURON NA 12030104 FLUAZIFOP-P-BUTYL NA 12030104 ORYZALIN NA 12030104 2,4-D ACID NA 12030104 CYHALOTHRIN NA 12030104 DICAMBA NA 12030104 FENVALERATE NA 12030104 MEPIQUAT NA 93 ------- Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCB 12030105 ARSENIC ACID .017932 12030105 ATRAZINE .007592 12030105 PROMETRYN .006352 12030105 TERBUFOS .003778 12030105 ALDICARB .002227 12030105 METOLACHLOR .001916 12030105 METHYL PARATHION .001696 12030105 THIODICARB .001325 12030105 DICROTOPHOS .001197 12030105 GLYPHOSATE .001172 12030105 CHLORPYRIFOS .001099 12030105 ALACHLOR .001099 12030105 PROFENOFOS .000976 12030105 PROPARGITE .000955 12030105 CARBOFURAN .000933 12030105 ACEPHATE .000757 12030105 ETHEPHON .000628 12030105 PARAQUAT .000548 12030105 METHOMYL .000504 12030105 SETHOXYDIM .000433 12030105 PENDIMETHALIN .000392 12030105 DIMETHOATE .000384 12030105 MANCOZEB .000364 12030105 CARBARYL .000231 12030105 DIURON .000217 12030105 CYANAZINE .000157 12030105 PARATHION .000149 12030105 THIDIAZURON .000138 12030105 OXYDEMETON-METHYL .000112 12030105 PROPICONAZOLE .000102 12030105 PHOSPHAMIDON .000093 12030105 MONOCROTOPHOS .000081 12030105 AZINPHOS-METHYL .000080 12030105 BROMOXYNIL .000061 12030105 CHLORSULFURON .000045 12030105 BIFENTHRIN .000023 12030105 CYPERMETHRIN .000019 12030105 METSULFURON-METHYL .000002 12030105 CYFLUTHRIN .000000 12030105 DICLOFOP-METHYL .000000 12030105 ESFENVALERATE .000000 12030105 TRIFLURALIN .000000 12030105 MONOSODIUM METHANEARSONATE NA 12030105 DISULFOTON NA 12030105 FLUAZIFOP-P-BUTYL NA 12030105 PHOSALONE NA 12030105 TRIADIMEFON NA 12030105 2,4-D ACID NA 12030105 BUTIFOS NA 12030105 CYHALOTHRIN NA 12030105 DICAMBA NA 12030105 TRIPHENYLTIN NA 94 ------- Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCB 12030106 ALACHLOR .004649 12030106 ATRAZINE .002882 12030106 TERBUFOS .002864 12030106 METHYL PARATHION .000652 12030106 PENDIMETHALIN .000602 12030106 METOLACHLOR .000486 12030106 CARBARYL .000481 12030106 CARBOFURAN .000365 12030106 PROMETRYN .000338 12030106 MANCOZEB .000333 12030106 DIMETHOATE .000320 12030106 CYANAZINE .000231 12030106 DICROTOPHOS .000217 12030106 BROMOXYNIL .000050 12030106 CHLORSULFURON .000042 12030106 PROPICONAZOLE .000041 12030106 METSULFURON-METHYL .000003 12030106 GLYPHOSATE .000001 12030106 SETHOXYDIM .000001 12030106 DICLOFOP-METHYL .000000 12030106 MALATHION .000000 12030106 TRIFLURALIN .000000 12030106 DISULFOTON NA 12030106 TRIADIMEFON NA 12030106 FLUAZIFOP-P-BUTYL NA 12030106 2,4-D ACID NA 12030106 DICAMBA NA 12030107 CARBARYL .000812 12030107 DIURON .000349 12030107 PENDIMETHALIN .000336 12030107 DIMETHOATE .000133 12030107 CHLORTHAL DIMETHYL .000102 12030107 GLYPHOSATE .000097 12030107 METHYL PARATHION .000082 12030107 ATRAZINE .000050 12030107 ENDOSULFAN .000030 12030107 MANCOZEB .000022 12030107 PARATHION .000020 12030107 DIAZINON .000016 12030107 OXYDEMETON-METHYL .000011 12030107 CHLORSULFURON .000010 12030107 METSULFURON-METHYL .000001 12030107 BENOMYL .000000 12030107 CHLOROTHALONIL .000000 12030107 TRIFLURALIN .000000 12030107 DISULFOTON NA 12030107 TRICLOPYR NA 12030107 FLUAZIFOP-P-BUTYL NA 12030107 2,4-D ACID NA 12030107 DICAMBA NA 12030107 DSMA NA 12030107 FENVALERATE NA 95 ------- Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCB 12030108 ARSENIC ACID .036015 12030108 PROMETRYN .011797 12030108 METOLACHLOR .006530 12030108 PARATHION .005942 12030108 ATRAZINE .005642 12030108 GLYPHOSATE .004121 12030108 ALDICARB .004096 12030108 TERBUFOS .002106 12030108 CARBOFURAN .002106 12030108 ACEPHATE .001540 12030108 PROPARGITE .001517 12030108 METHYL PARATHION .001157 12030108 DICROTOPHOS .001027 12030108 CARBARYL .000847 12030108 METHOMYL .000812 12030108 DIMETHOATE .000794 12030108 DIURON .000762 12030108 PROPICONAZOLE .000692 12030108 THIODICARB .000564 12030108 MONOCROTOPHOS .000285 12030108 MANCOZEB .000281 12030108 PENDIMETHALIN .000216 12030108 THIDIAZURON .000183 12030108 PARAQUAT .000164 12030108 ALACHLOR .000147 12030108 AZINPHOS-METHYL .000097 12030108 CYPERMETHRIN .000080 12030108 CHLORSULFURON .000064 12030108 BROMOXYNIL .000027 12030108 CHLORPYRIFOS .000015 12030108 METSULFURON-METHYL .000001 12030108 BENOMYL .000000 12030108 DICLOFOP-METHYL .000000 12030108 ESFENVALERATE .000000 12030108 MALATHION .000000 12030108 PETROLEUM OIL .000000 12030108 TRIFLURALIN .000000 12030108 MONOSODIUM METHANEARSONATE NA 12030108 DISULFOTON NA 12030108 FLUAZIFOP-P-BUTYL NA 12030108 TRIADIMEFON NA 12030108 PHOSALONE NA 12030108 2,4-D ACID NA 12030108 BUTIFOS NA 12030108 CYHALOTHRIN NA 12030108 DICAMBA NA 12030108 FENVALERATE NA 12030108 TRIPHENYLTIN NA 12030109 ARSENIC ACID .024870 12030109 ATRAZINE .012369 12030109 PROMETRYN .008288 12030109 TERBUFOS .005542 12030109 METOLACHLOR .003355 12030109 ALDICARB .002974 96 ------- Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCB 12030109 METHYL PARATHION .002393 12030109 CHLORPYRIFOS .002050 12030109 THIODICARB .001735 12030109 DICROTOPHOS .001615 12030109 GLYPHOSATE .001585 12030109 DIMETHOATE .001359 12030109 ALACHLOR .001342 12030109 PROFENOFOS .001251 12030109 PROPARGITE .001251 12030109 ACEPHATE .001027 12030109 CARBOFURAN .001022 12030109 MANCOZEB .000934 12030109 PARATHION .000812 12030109 ETHEPHON .000806 12030109 METHOMYL .000772 12030109 PARAQUAT .000714 12030109 SETHOXYDIM .000555 12030109 PENDIMETHALIN .000516 12030109 PROPICONAZOLE .000360 12030109 DIURON .000328 12030109 CARBARYL .000296 12030109 CYANAZINE .000294 12030109 THIDIAZURON .000187 12030109 CHLORSULFURON .000170 12030109 BROMOXYNIL .000157 12030109 OXYDEMETON-METHYL .000143 12030109 MONOCROTOPHOS .000122 12030109 PHOSPHAMIDON .000119 12030109 AZINPHOS-METHYL .000108 12030109 CYPERMETHRIN .000029 12030109 BIFENTHRIN .000029 12030109 METSULFURON-METHYL .000004 12030109 CYFLUTHRIN .000000 12030109 DICLOFOP-METHYL .000000 12030109 ESFENVALERATE .000000 12030109 TRIFLURALIN .000000 12030109 MONOSODIUM METHANEARSONATE NA 12030109 DISULFOTON NA 12030109 FLUAZIFOP-P-BUTYL NA 12030109 TRIADIMEFON NA 12030109 PHOSALONE NA 12030109 2,4-D ACID NA 12030109 BUTIFOS NA 12030109 CYHALOTHRIN NA 12030109 DICAMBA NA 12030109 TRIPHENYLTIN NA 12030201 CARBARYL .001026 12030201 ARSENIC ACID .000071 12030201 PROMETRYN .000011 12030201 METOLACHLOR .000010 12030201 ALDICARB .000009 12030201 CHLORPYRIFOS .000006 12030201 GLYPHOSATE .000006 97 ------- Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCB 12030201 METHYL PARATHION .000006 12030201 PARATHION .000006 12030201 METHOMYL .000004 12030201 DICROTOPHOS .000003 12030201 DIURON .000003 12030201 THIODICARB .000002 12030201 AZINPHOS-METHYL .000002 12030201 ACEPHATE .000002 12030201 PROPICONAZOLE .000002 12030201 PROPARGITE .000002 12030201 MONOCROTOPHOS .000001 12030201 PENDIMETHALIN .000001 12030201 DIMETHOATE .000000 12030201 PARAQUAT .000000 12030201 THIDIAZURON .000000 12030201 CYPERMETHRIN .000000 12030201 CHLORSULFURON .000000 12030201 BENOHYL .000000 12030201 CHLOROTHALONIL .000000 12030201 ESFENVALERATE .000000 12030201 MALATHION .000000 12030201 PETROLEUM OIL .000000 12030201 TRIFLURALIN .000000 12030201 MONOSODIUM METHANEARSONATE NA 12030201 DISULFOTON NA 12030201 FLUAZIFOP-P-BUTYL NA 12030201 PHOSALONE NA 12030201 TRIADIMEFON NA 12030201 2,4-D ACID NA 12030201 BUTIFOS NA 12030201 CAPTAN NA 12030201 CYHALOTHRIN NA 12030201 DICAMBA NA 12030201 TRIPHENYLTIN NA 12030202 SULPROFOS .000118 12030202 CARBARYL .000081 12030202 MOLINATE .000056 12030202 THIOBENCARB .000020 12030202 DIAZINON .000018 12030202 DIMETHOATE .000016 12030202 MANCOZEB .000009 12030202 METOLACHLOR .000009 12030202 METHYL PARATHION .000006 12030202 BENTAZON .000005 12030202 CARBOFURAN .000005 12030202 PENDIMETHALIN .000003 12030202 GLYPHOSATE .000003 12030202 ACIFLUORFEN .000002 12030202 PROPICONAZOLE .000001 12030202 ALACHLOR .000001 12030202 IPRODIONE .000000 12030202 METRIBUZIN .000000 12030202 LINURON .000000 98 ------- Appendix L. Normalized hazard rating coefficients emphasizing bioaccumulation (NHRCB) for agricultural pesticides in the Trinity River Basin by hydrologic unit (HU) and by pesticide.*(continued) HU PESTICIDE NHRCB 12030202 PERMETHRIN .000000 12030202 SETHOXYDIM .000000 12030202 IMAZAQUIN ACID .000000 12030202 BENOMYL .000000 12030202 CHLOROTHALONIL .000000 12030202 MALATHION .000000 12030202 PROPANIL .000000 12030202 TRIFLURALIN .000000 12030202 CLOPYRALID NA 12030202 FOMESAFEN NA 12030202 TRIADIMEFON NA 12030202 FLUAZIFOP-P-BUTYL NA 12030202 2,4-D ACID NA 12030202 DICAMBA NA 12030202 FURORE NA 12030203 MOLINATE .006144 12030203 THIOBENCARB .005373 12030203 CARBARYL .004825 12030203 BENTAZON .002608 12030203 CARBOFURAN .001544 12030203 METHYL PARATHION .001309 12030203 ACIFLUORFEN .001202 12030203 LINURON .000797 12030203 ALACHLOR .000608 12030203 PROP I CON A Z OLE .000512 12030203 IPRODIONE .000264 12030203 PENDIMETHALIN .000236 12030203 IMAZAQUIN ACID .000135 12030203 BENOMYL .000000 12030203 PROPANIL .000000 12030203 TRIFLURALIN .000000 12030203 FOMESAFEN NA 12030203 FLUAZIFOP-P-BUTYL NA 12030203 2,4-D ACID NA 12030203 FENVALERATE NA 12030203 FURORE NA * NA means that one or more of the data elements needed to calculate NHRCB for the pesticide was not available. Picloram and 2,4-D combinations for hay and pasture application were not included because rates were dependent on brush intensity rather than per acre. Pesticides not included in the table had no use reported. Numbers were truncated to six decimal places. 99 ------- Appendix M. Maps of the Trinity River Basin in Texas generated with ARC/INFO. The surface water or hydrology was available as a data set or theme for the area (Appendix K) from the TIGER files which originate from USGS Digital Line Graphs. These files number each hydrologic unit (HU) as a segment of a river system. The HU's in the Trinity River basin and the associated numbers are presented here. A few small HU's near the mouth of the river have been included besides those delineated as the Trinity River by TWC (1990) because the HU's have been associated at least in part with the Trinity. Maps included: Hydrologic Units in the Trinity River Basin with County Boundaries in Central and East Texas Hydrology of the Trinity River Basin Normalized Hazard Rating Coefficients emphasizing Mobility by Hydrologic Unit in the Trinity River Basin for the following pesticides: Normalized Hazard Rating Coefficients emphasizing Bioaccumulation by Hydrologic Unit in the Trinity River Basin for the following pesticides: atrazine bentazon carbaryl dicrotophos acephate alachlor aldicarb arsenic acid diuron ethephon fluometuron metolachlor parathion (ethyl) parathion (methyl) prometryn terbufos acephate alachlor aldicarb diuron ethephon fluometuron metolachlor parathion (ethyl) parathion (methyl) prometryn terbufos arsenic acid atrazine bentazon carbaryl dicrotophos 100 ------- Hydrologic Unit Areas in the Trinity River Basin with County Boundaries in Central and East Texas v-1203010? &030104 : 120301Q1 12.0301Q2, 12030108 1'2030?01 12^30202' 101 ------- Hydrology in the Trinity River Basin 102 ------- Normalized Hazard Rating emphasizing Mobility for Acephate by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 0.000000-0.000001 0.000001 - 0.000050 ^1 0.000051 - 0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 1! d ET3 -H- 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 103 ------- Normalized Hazard Rating emphasizing Mobility for Alachlor by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating CD EZ3 -H- 0.000000-0.000001 0.000001 - 0.000050 0.000051-0.000100 ^ 0.000101 - 0.000150 0.000151-0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351-0.000400 0.000401 • 0.000450 0.000451 - 0.000500 Greater than 0.000500 104 ------- Normalized Hazard Rating emphasizing Mobility for Aldicarb by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 0.000000-0.000001 0.000001 - 0.000050 0.000051 - 0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 EZ3 0.000401 - 0.000450 -H- 0.000451-0.000500 Greater than 0.000500 105 ------- Normalized Hazard Rating emphasizing Mobility for Arsenic Acid by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 77. & 0.000000- 0.000001 0.000001 - 0.000050 0.000051-0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 EZ3 11 000401 - 0.000450 0.000451 -0.000500 Greater than 0.000500 106 ------- Normalized Hazard Rating emphasizing Mobility for Atrazine by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 0.000000-0.000001 0.000001 - 0.000050 0.000051-0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 H Em EZ3 -H- 0.000301 - 0.000350 0.000351-0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 107 ------- Normalized Hazard Rating emphasizing Mobility for Bentazon by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 0.000000 - 0.000001 0.000001 - 0.000050 0.000051-0.000100 0.000101-0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 |a ¦ ¦ | 0-' 000401 - 0.000450 -H- 0.000451 - 0.000500 Greater than 0.000500 108 ------- Normalized Hazard Rating emphasizing Mobility for Carbaryl by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating in re 0.000000 - 0.000001 0.000001 - 0.000050 0.000051 - 0.000100 0.000101-0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351-0.000400 Q * 000401 - 0.000450 0.000451-0.000500 Greater than 0.000500 109 ------- Normalized Hazard Rating emphasizing Mobility for Dicrotophos by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 0.000000-0.000001 0.000001 - 0.000050 in] EZ3 0.000051 - 0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 -0.000500 Greater than 0.000500 110 ------- Normalized Hazard Rating emphasizing by Hydrologic Unit in the Trinity Mobility for Diuron River Basin Normalized Hazard Rating 0.000000-0.000001 0.000001 - 0.000050 0.000051-0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 E3 EZ3 °J 0.000351 - 0.000400 000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 111 ------- Normalized Hazard Rating emphasizing Mobility for Ethephon by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating v?. m EC EZ3 0.000000 - 0.000001 0.000001 - 0.000050 0.000051 - 0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 112 ------- Normalized Hazard Rating emphasizing Mobility for Fluometuron by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating VS Em EZ3 -H- 0.000000-0.000001 0.000001 - 0.000050 0.000051 - 0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 113 ------- Normalized Hazard Rating emphasizing by Hydrologic Unit in the Trinity Mobility for Methyl Parathion River Basin Normalized Hazard Rating 22 Em F~"1 -H- 0.000000- 0.000001 0.000001 - 0.000050 0.000051 -0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 -0.000500 Greater than 0.000500 114 ------- Normalized Hazard Rating emphasizing Mobility for Metolachlor by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating EH 0.000000 - 0.000001 0.000001 - 0.000050 0.000051 -0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 F~"1 0.000401 - 0.000450 4f 0.000451 - 0.000500 Greater than 0.000500 115 ------- Normalized Hazard Rating emphasizing Mobility for Parathion by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating * ** » 0.000000-0.000001 0.000001 - 0.000050 • • • • 0.000051-0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 EH 0.000451 - 0.000500 Greater than 0.000500 116 ------- Normalized Hazard Rating emphasizing Mobility for Prometryn by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 22 m cm F77! EH 0.000000 - 0.000001 0.000001 - 0.000050 0.000051 - 0.000100 O 0.000101-0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 117 ------- Normalized Hazard Rating emphasizing Mobility for Terbufos by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating mi EZ3 0.000000-0.000001 0.000001 - 0.000050 0.000051 - 0.000100 0.000101-0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 118 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Acephate by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 11 cm Em 0.000000 - 0.000001 0.000001 - 0.000050 0.000051 - 0.000100 0.000101-0.000150 0.000151-0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 119 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Alachlor by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 0.000000 - 0.000001 0.000001 - 0.000050 O.O0OO51 - 0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 a a m 0.000401-0.000450 +1- 0.000451 - 0.000500 Greater than 0.000500 120 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Aldicarb by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 0.000000-0.000001 0.000001 - 0.000050 <>"«W * (i • • • • 0.000051-0.000100 0.000101-0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451-0.000500 Greater than 0.000500 121 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Arsenic Acid by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating VP. cm Em -H- 0.000000-0.000001 0.000001 - 0.000050 0.000051 - 0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 ¦ 0.000450 0.000451 - 0.000500 Greater than 0.000500 122 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Atrazine by Hydrologic Unit in the Trinity River Basin m Normalized Hazard Rating HI cn 0.000000 - 0.000001 0.000001 - 0.000050 0.000051 - 0.000100 ^ 0.000101-0.000150 Em 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 123 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Bentazon by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating » » V« A 0.000000-0.000001 0.000001 - 0.000050 0.000051-0.000100 0.000101 - 0.000150 0.000151-0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 F"1 0.000401 - 0.000450 -1+ 0.000451 - 0.000500 Greater than 0.000500 124 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Carbaiyl by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating X 0.000000-0.000001 0.000001 - 0.000050 i • • • • 0.000051 - 0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 +H 0.000451-0.000500 Greater than 0.000500 125 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Dicrotophos by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 0.000000-0.000001 0.000001 - 0.000050 0.000051-0.000100 0.000101-0.000150 0.000151 - 0.000200 EH G3 EZ3 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 126 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Diuron by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating HI eh EZ3 0.000000 - 0.000001 0.000001 - 0.000050 UK 0.000051 - 0.000100 0.000101-0.000150 0.00015! - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 127 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Ethephon by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating E3 EZ3 eh 0.000000 - 0.000001 0.000001 - 0.000050 0.000051-0.000100 0.000101 - 0.000150 0.000151-0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 128 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Fluometuron by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 0.000000- 0.000001 0.000001 - 0.000050 0.000051 -0.000100 0.000101-0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 ;u 0.000451 - 0.000500 Greater than 0.000500 129 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Methyl Parathion by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating * * 0.000000-0.000001 0.000001 - 0.000050 0.000051 - 0.000100 O 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 E5S 0.000451 - 0.000500 Greater than 0.000500 130 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Metolachlor by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating •\S1 0.000000-0.000001 0.000001 - 0.000050 0.000051-0.000100 0.000101-0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 131 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Parathion by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating Em El3 0.000000 - 0.000001 0.000001 - 0.000050 0.000051 - 0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 1.000301 - 0.000350 0.000351-0.000400 0.000401 - 0.000450 0.000451-0.000500 Greater than 0.000500 132 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Prometryn by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating 22 r- b u o 0.000000 - 0.000001 0.000001 - 0.000050 0.000051 - 0.000100 0.000101-0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 EZ3 0.000401 - 0.000450 +1- 0.000451 - 0.000500 Greater than 0.000500 133 ------- Normalized Hazard Rating emphasizing Bioaccumulation for Terbufos by Hydrologic Unit in the Trinity River Basin Normalized Hazard Rating sS '0«v> A. AT X A o • • • 0.000000-0.000001 0.000001 - 0.000050 EZ3 E3 0.000051-0.000100 0.000101 - 0.000150 0.000151 - 0.000200 0.000201 - 0.000250 0.000251 - 0.000300 0.000301 - 0.000350 0.000351 - 0.000400 0.000401 - 0.000450 0.000451 - 0.000500 Greater than 0.000500 134 ------- |