DRINKING WATER REGULATIONS AND HEALTH ADVISORIES by Office of Water U.S. Environmental Protection Agency Washington, D.C. 202-260-7571 SAFE DRINKING WATER HOTLINE 1-800-426-4791 Monday thru Friday, 8:30 AM to 5:00 PM EST April 1992 Printed on Recycled Paper ------- LEGEND Abbreviations column descriotions are: MCLG - Maximum Contaminant Level Goal. A non-enforceable concentration of a drinking water contaminant that is protective of adverse human health effects and allows an adequate margin of safety. MCL - Maximum Contaminant Level. Maximum permissible level of a contaminant in water which is delivered to any user of a public water system. ftf Q - Reference Dose. An estimate of a daily exposure to the human population that is likely to be without appreciable risk of deleterious effects over a lifetime. DWEL - Drinking Water Equivalent Level. A lifetime exposure concentration protective of adverse, non-cancer health effects, that assumes all of the exposure to a contaminant is from a drinking water source. (1 The codes for the Status Rea and Status HA columns are as follows: E - final Q - draft L - listed for regulation - proposed (Phase II and V proposals) I - tentative Other codes found in the table include the following: - not applicable - performance standard 0.5 NTU - 1.0 NTU fl - treatment technique ** - No more than 5% of the samples per month may be positive. For systems collecting fewer than 40 samples/month, no more than 1 sample per month may be positive. - guidance - Large discrepancies between Lifetime and Longer-term HA values may occur because of the Agency’s conservative policies, especially with regard to carcinogenicity, relative source contribution, and less than lifetime exposures in chronic toxicity testing. These factors can result in a cumulative UF (uncertainty factor) of 10 to 1000 when calculating a Lifetime HA. Chemical abbreviations include the following: PAH - polycyclic aromated hydrocarbon EDB - ethylene dibromide - phthatate acid ester PCBs - polychlorinated biphenyls THM - trihalomethane DBCP - dibromochloropropane ------- DRINKING WATER STANDARDS AND HEALTH ADVISORIES April1992 Paael W Ith A sir . Chemicals 1 0-kg Child I 70-kg Adult I Longer- Longer- mgI l Status MCLG MCL Status One-day Ten-day term term RfD DWEL Lifetime at 1 o Reg. ’ (mg/I) (mg/I) HA’ I mg/I mg/I mg/I mg/I mg/kg/day mg/I mg/I Cancer I Risk Cancer Group I____ I ORGANICS Acenaphthene - - - I - I - - - - 0.06 - - - Acifluorfen 1 - - - P 2 2 0.1 0.4 0.013 0.4 - 0.1 I B2 Acrylamide F zero TI F 1.5 0.3 0.02 0.07 0.0002 0.007 - 0.001 B2 Acry lonitrile I - - D 0.02 0.02 0.001 0.004 0.0001 0.004 - 0.007 Bi AdiDates (diethylhexyl) P 0.5 0.5 - - - - 0.7 20 0.5 - Alach ior I F zero 0.002 F 0.1 0.1 - I - 0.01 0.4 - 0.04 ( 82 Aldicarb F 0.001 0.003 F - - - - 0.0002 0.004 0.001 - I D Aldicarb sulfone F 0.001 0.002 F - - - - 0.0002 0.004 0.001 - D Aidicarb sulfoxide F 0.001 0.004 F - - - - 0.0002 0.004 0.001 - 0 Aldrin - - - - j D 0.0003 0.0003 0.0003 0.0003 0.00003 0.001 - 0.0002 L&Z Ametryn - - - F 9 9 0.9 3 0.009 0.3 0.06 - D Ammonium Sulfamate - - - F 20 20 20 80 0.28 8 2 - 0 Anthracene (PAH) - • - I - - - - I - 0.3 - - - f D Atrazine F 0.003 0.003 j F 0.1 0.1 0.05 0.2 0.005 0.2 0.003 - j C Baypon - - F 0.04 0.04 0.04 0.1 0.004 0.1 0.003 - C Bentazon I - J F 0.3 . 0.3 0.3 0.9 0.0025 0.09 0.02 D Benz(a)anthrapene (PAH) P zero 0.0001 I - - - - - - - B2 Benzene F zero 0.005 F 0.2 0.2 - - - - - 0.1 A Benzo(a)pyrene (PAH) P zero 0.0002 - - - - - - - - B2 Benzo(b)fluorpnthene (PAH) P zero 0.0002 - - - - - - - Benzo(g,h,i)perylene (PAH) Benzo(k)fluoranthene (PAH) bis-2-Chtoroisopropyl ether Bromacil Bromobenzene - - - P zero 0.0002 - - - F I - - F L L - - [ D - - - - - - 4 4 4 5 5 3 - - - - - - - - - - - 13 0.04 1 0.3 - 9 0.13 5 0.09 - - - - - - D 82 D C . * Under review. NOTE: Anthracene and Benzo(g,h,i)perylene -- not proposed in Phase V. CHANGES FROM THE LAST VERSION ARE NOTED IN ITALIC AND BOLD FACE PRIr ------- Anril 1992 P nn 2 Bromochioroacetonitrile Bromochioromethane Bromodichloromethane (THM) Bromoform (THM) Bromomethane I L - - D - - F L - 0.1 D L - 0.1 D L - - F - - - 50 1 1 7 7 4 f 5 2 2 0.1 0.1 0.1 - - - - - - - 5 0.013 0.5 0.09 - I 13 0.02 0.7 - 0.14 6 0.02 0.7 - 0.4 0.5 0.001 0.05 0.01 - - B2 B2 D Butyl benzy phthalate (PAE) Butylate Butylbenzene n- Butylbenzene sec- Butylbenzene tert- P zero 0.1 - - - - - - I - - - - - - - F D D D - - - 0.2 6 - - C 2 2 1 I 4 0.05 2 0.35 D - - . - - - - - - - - - - - - - - - - - - - - - - - 1 1 1 1 0.1 4 0.7 D 0.05 0.05 0.05 0.2 0.005 0.2 0.04 - E 4 0.2 0.07 0.3 0.0007 0.03 - 0.03 82 1 1 1 4 0.1 4 0.7 D 7 1.4 0.16 0.56 0.0016 0.056 0.045 - L....... Carbaryl Carbofuran Carbon Tetrachloride Carboxin Chloral Hydrate - - - F 0.04 0.04 F zero 0.005 I - - - L - - F F F j F D Chioramben Chiordane Chiorodibromomethane (THM) Chioroethane Chloroform (THM) I - - - F zero 0.002 L - 0.1 L - - I - 0.1 F I F D 0 f 0 3 3 0.2 0.06 0.06 - 7 7 2 - - - 4 4 0.1 0.5 0.015 0.5 0.1 - - 0.00006 0.002 - 0.003 8 0.02 0.7 0.06 - - - - - 0.4 0.01 0.4 - 0.6 D B2 C 82 Chloromethane Chiorophenol (2-) p-Chiorophenyl methyl I sulfide/suit one/suif oxide Chioropicrin Chlorothalonii J. L - - F 9 0.4 0.4 - - - D 0.05 0.05 0.05 I I - - D - - - L - - - - - - - - F 0.2 0.2 0.2 1 1 0.004 0.1 0.003 - 0.2 0.005 0.2 0.04 - - - - - - - - - 0.5 0.015 0.5 - 0.15 C D o . 82 Chiorotoluene 0- Chiorotoluene p- Chiorpyrifos Chrysene (PAH) Cyanazine L - - F 2 2 2 7 0.02 0.7 0.1 - I I - - F 2 2 2 7 0.02 0.7 0.1 - - - - I D 0.03 0.03 0.03 0.1 0.003 0.1 0.02 - I P zero 0.0002 I - - - - I - - - I L - - I F 0.1 0.1 0.02 I 0.07 0.002 0.07 0.001 - I D D D 82 Chemicals Standards — Health Advisories Status MCIG MCI Reg.* (mg/I) (mg/I) 1 0-ko Child 70-ka Adult Longer- Status I One-day Ten-day term HA* mg/I mg/I mg/i Longer- term mg/I RfD DWEL Ufetime mg/kg/day mg/i mg/I mg/i at 106 Cancer Risk Cancer Group Under review. NOTE: Chrysene was proposed in second option. ------- AorR 1992 U I.k Chemicals I Status MCLG MCL Reg. ’ (mg/I) (mg/I) 10-kg Child I Longer- Status I One-day Ten-day term HA’ I mg/I mg/i mg/I 70-kg Adult Cancer Group Longer- mg/I term RfD DWEL Ufetime at I 0.4 mg/I mg/kg/day mg/i mg/I Cancer I Risk Cyanogen Chloride Cymenep- 2,4-D DCPA (Dacthal) Dalaøon L - - - - - F 0.07 0.07 I - - P 0.2 0.2 - D I F F I F - - - - - - 1 0.3 0.1 80 80 5 3 3 0.3 . - - - - - - 0.4 0.01 0.4 0.07 - 20 0.5 20 4 - 0.9 0.026 0.9 0.2 - 20 0.4 3 . D 0 D C E B2 C D D D . - C D 0 C 0 B2 C D D 82 D - B2 - L Di [ 2-ethylhexyfladiPate P 0.4 0.4 Diazinon - - - Dibenz(a,h)anthraCefle (PAH) P zero 0.0003 DibromoacetOnitrile L - - I DibrpmochloroorOOafle (DBCPI F zero 0.0002 Dibromomethafle L - - Dibutyl phthalate (PAE) - - - Dicamba I - - Dichioroacetaldehyde L - - Dichiproacetic acid I - - - 20 20 20 F 0.02 0.02 0.005 - - - - D 2 2 2 F J 0.2 0.05 - 60 0.02 0.00009 0.003 0.0006 - - - - - - 8 0.02 0.8 0.02 - - - - - 0.003 - I - - - - - - - F 0.3 0.3 0.3 D - - - D - - - - - - - 0.1 4 1 0.03 1 0.2 - - - - - - - - - - - 0.3 0.006 - Dichioroacetonitrile Dkh!oa’obenzefle o- Dichlorobenzefle in- * Dichlorobenzene p- Dichiorodifluoromethafle Dichloroethahe (1 .1-) I L - F 0.6 0.6 F 0.6 Gb F 0.075 0.075 I - - 1 - - I D F F F F D 1 1 0.8 I 3 0.008 I . 9 9 I 30 0.9 3 0.6 - 9 9 9 30 0.9 3 0.6 - 10 10 10 40 0.1 4 0.075 - 40 40 9 30 0.2 5 1 - - - - - - - - - - 0.04 Dichloroethane (1,2-) F zero 0.005 Dichloroethylene (1,1-) I F 0.007 0.007 Dichloroethylefle (cis-1,2-) F 0.07 0.07 Dichioroethylefle (trans-1,2-} F 0.1 0.1 Dichloromethafle P zero 0.005 F F F F F 0.7 0.7 0.7 2 1 1 4 3 3 20 2 2 10 2 - 2.6 4 0.009 0.4 0.007 - I 11 0.01 0.4 0.07 - 6 0.02 0.6 0.1 - - 0.06 2 - 0.5 0.02 - Dichlorophenol (2,4-) - - - Dichloropropafle (1 , 1-) I - - - Dichloropropane (1,2-) F zero 0.005 Dichloropropafle (1,3-) L - - DichlorooroDafle (2,2-) L - - D 0 F 0 j 0 0.03 0.03 0.03 - - - - 0.09 - - - - - - - j 0.1 0.003 - - - - - - - - 0.05 . - - - - . - . - - ‘The values for m-dichlorobeflzefle are based on data for o-dichlorobenzene ------- Annl 1992 - - Page 4 Ad... .. .... . I I O•tII V LJVIC JhIflC Chemicals Status MCLG MCI Reg. (mg/I) (mg/I) I 10-kg Child J 70-kg Adult I I Longer- Longer- mg/I I Status I One-day Ten-day term term RfD DWEL Ufetime at 10 HA I mg/I mg/i mg/I mg/I mg/kg/day mg/i mg/I Cancer Cancer I Group . Dichloropropene (1,1-) Dichloropropene (1,3-) Dieldrin Diethyl phthalate (PAE) Diethylene glycol Risk L - - D - - - - - - - - - L - I F 0.03 0.03 0.03 0.1 0.0003 0.01 0.02 B2 - - - I F 0.0005 0.0005 0.0005 0.002 0.00005 0.002 - 0.0002 B2 - - - D - - - - 0.8 30 5 - D J I - - - D - - - - - - - - P zero 0.004 D - - - - 0.02 0.7 - 0.3 B2 - - F 8 8 . 8 30 0.08 3 0.6 - D - - - F 10 10 10 40 0.3 10 2 - D - - - D - - - - 0.2 - - - c - - - I - I - - - I - - - - - D - - - F 0.04 0.04 0.04 0.14 0.0001 0.005 0.001 - D 1 - - F I 0.50 0.50 0.30 I 1.0 0.002 0.1 - 5.0 B2 L - - F 0.40 0.40 0.40 1.0 0.001 0.04 - £0 B2 P 0.007 0.007 F I 0.3 0.3 0.01 I 0.04 0.001 0.04 0.007 - D - - - F 4 0.4 - j. - - - 0.7 B2 - - - F 0.3 0.3 0.3 1 0.03 1 0.2 - D P 0.02 0.02 I - - - - - 0.0022 0.08 0.02 - D - - - F 0.01 0.01 0.003 0.009 0.00004 0.001 0.0003 - E - - - 0 - - - - - - - - o - - - F 1 1 0.3 0.9 0.002 0.07 0.01 0 P 0.1 0.1 F 0.8 0.8 0.2 0.2 0.02 0.7 0.1 - D P 0.002 0.002 F 0.02 0.02 0.003 0.01 0.0003 0.01 0.002 - D F zero TT F 0.1 0.1 0.07 0.07 0.002 0.07 - 0.4 B2 F 0.7 0.7 F 30 3 1 I 3 0.1 3 0.7 - D F zero 0.00005J F 0.008 0.008 - - - - - 0.00004 - - - F 20 6 6 20 2 40 7 . J 0 L - - F 0.3 0.3 0.1 0.4 0.00008 0.003 - 0.006I B2 - - - F 0.009 0.009 0.005 0.02 0.00025 0.009 0.002 - J D - - - F 2 2 2 5 0.013 0.4 0.09 - I D - - - - - - 0.04 - - - I D dinitrate Diethylhexyl phthalate (PAE) Diisopropyl methylphosphonate Dimethrin Dimethyl methylphosphonate Dimethyl phthlate (PAE} 1,3-Dinitrobenzene Dinitrotoluene (2,4-) Dinitrotoluene (2,6) Dinoseb Dioxane g- Diphenamid Diquat Disulfoton 1 ,4-Dithiane Diuron Endothail Endrin Epichiorohydrin Ethylbenzene Ethylene dibromide (EDB) Ethylene glycol ETU Fenamiphos I Fluometuron Fluorene (PAH) Under review. Not verified yet. ------- Paoe 5 Anril 1992 Li .d.I. A La,uuo,uo JW II.I — I Chemicals Status MCLG MCL Reg.* (mg/I) (mg/I) 10-kg ChIld I Longer- I Status One-day Tan-day term HA I mg/I mg/I mg/I j 70-kg Adult Cancer Group Longer- mg/I term RfD DWEL Lifetime at iO mg/I mg/kglday mg/I mg/I Cancer Risk Fluorotrich loromethafle FogOil Fonotos Formaldehyde Gasoline, unleaded (benzene) L - - - - - - - - - - - - - F 0 F D D . 7 7 3 10 0.3 10 2 - - - - - - - 0.02 0.02 0.02 0.07 0.002 0.07 0.01 - 10 5 5 I 20 0.15 5 1 - I - - - - - - 0.005 - D - 0 Bi • D B2 B2 B2 & D I C D D .. - - B2 C D • C D D E D D D D j . . .• . .•Q Glyphosate Heptachlor Heptachior epoxide Hexachlorobenzene Hexachlorobutadier e P 0.7 0.7 F F zero 0.0004 F F zero 0.0002 I F P zero 0.001 F I - - J F 20 20 1 0.01 0.01 0.005 0.01 - 0.0001 0.05 0.05 0.05 0.3 0.3 0.1 1 0.1 4 0.7 - 0.005 0.0005 0.02 0.0008 0.0001 1 .3E-05 0.0004 - 0.0004 0.2 0.0008 0.03 - 0.002 0.4 0.002 0.07 0.001 - 0.2 - - HexachlorocyClOPefltadierle Hexachloroethafle Hexane In-) Hexazinone HMX P 0.05 0.05 L - - - - - - - - - - - - F 5 5 0.1 F 10 4 4 F 3 3 3 F 5 5 5 - 0.5 0.001 0.04 0.001 - 10 - - - 9 0.033 1 0.2 - 20 0.05 2 0.4 - Hypochlorite Hypochiorous acid Indeno(1,2,3,-c,d)pyrefle (PAH) Isophorone Isopropyl methylphos honate Isopropylbenzene Lindane Malathion Maleic hydrazide MCPA L - I - I - - - I - - - - - - - - - - . - I - - - - - P zero 0.0004 D - - - I - - - - - L • - D 15 15 15 j 15 0.2 7 0.1 - - - - D 30 30 30 1100 0.1 4.0 0.7 - - - - F 2E-4 0.0002 - - - - - - i. - - - D F D F F - - - I - - - - - 1 1 0.03 0.1 0.0003 0.01 0.0002 - 0.2 0.2 0.2 0.8 0.02 0.8 0.2 - 10 10 5 20 0.5 20 4 - j 0.1 0.1 0.1 0.4 0.0015 0.05 0.01 - Methomyl Methoxychior Methyl ethyl ketone Methyl parathion Methyl tert butyl ether L - - F 0.04 0.04 L - - - - - L - - F F F F D 0.3 0.3 0.3 0.05 0.05 0.05 80 8 3 0.3 0.3 0.03 1 3 3 0.5 0.3 0.025 0.9 0.2 - 0.2 0.005 0.2 0.04 9 0.00005 0.9 0.2 - 0.1 0.00025 0.009 0.002 - 2 0.005 0.2 0.04 - ------- Anril 1992 Paae 6 1Jn Ith A,4%,icnr Q. chemicals I I_ I I Status MCLG MCL Status Reg.’ (mg/I) (mg/I) HA’ I lO-ka Child One-day Ten-day mg / I Longer- term mg/I mg/I 70-ko Adult Longer- term RID DWEL Ut etime mg/I mg/kg/day mg/I mg/I mg/I at 1O Cancer Risk Cancer Group Metotachlor L - - F Metribuzin I I - - F Monochioroacetic acid I - - D Monochlorobenzene I F 0.1 0.1 F Na hthalene 1. - - - F 2 2 2 5 5 0.3 - - 2 2 2 0.5 0.5 0.4 5 0.15 5 0.1 - I C 0.9 0.025 0.9 0.2 - I D - - - - I - 7 ‘ 0.02 0.7 0.1 - I 1 0.004 0.1 0.02 - Nitrocellulose (non-toxic) Nitroguanidine Nitrophenols p- Oxamyl (Vydate) Ozone by-Droducts - - - - - - - - - P 0.2 0.2 L - - F F I D I F - j - - - - - - - - I - 10 10 10 I 40 0.1 4 0.7 - D 0.8 0.8 0.8 I 3 0.008 0.3 0.06 - D 0.2 0.2 0.2 0.9 0.025 0.9 0.2 - - - - . - - - - Paraquat - - - F I 0.1 0.1 0.05 0.2 0.0045 0.2 0.03 - I E Pentachloroethane - - - D - - - I - - - - - - Pentachiorophenol F zero 0.001 I F I 1 0.3 0.3 I 1 0.03 1 - 0.03 B2 Phenanthrene (PAH) - - - - - - - - - - - - - Phenol - - - D 6 6 6 J 20 0.6 20 4 - D Picloram P 0.5 0.5 F 20 20 0.7 I 2 0.07 2 0.5 - D Polychiorinated byphenyls (PCBs) F zero 0.0005 P - - - I - - - 0.0005 B2 Prometon L - - F I 0.2 0.2 0.2 I 0.5 0.015 0.5 0.1 - I D Pronamide - - - F 0.8 0.8 0.8 I 3 0.075 3 0.05 - I C Propachior I - - - F 1 0.5 0.5 0.1 1 0.5 0.013 0.5 0.09 - Propazine I - - - F 1 1 0.5 I 2 0.02 0.7 0.01 - I C Propham - - - F 5 5 5 20 0.02 0.6 0.1 - D Propylbenzene n- - - D - - - - - - - - I - Pyrene (PAH) - - - I - I - - - - 0.03 - - D RDX - - - F 0.1 0.1 0.1 j 0.4 0.003 0.1 0.002 0.03 Simazine I P 0.004 0.004 F 0.07 0.07 0.07 Styrene I F 0.1 0.1 F I 20 2 2 2,4,5-T L - - F 0.8 0.8 0.8 2,3,7,8-TCDD (Dioxin) P zero 5E-08 I F 1E-06 1E-07 1E-08 Tebuthiuron J - - - I F I 3 3 0.7 0.07 0.005 0.2 0.004 I C 7 0.2 7 0.1 - I C 1 0.01 0.35 0.07 - I D 4E-08 1E-06 4E-08 - 2E-08 B2 2 0.07 2 0.5 - Under review. NOTE: Phenanthrene -- not proposed. ------- Anril 1992 P1OA 7 U ...I.I.. A,.. . ....;. ,. MCLG MCI (mg/I) (mg/I) 70-kg Adult Longer- mg/i term RfD DWEL Lifetime mg/I mg/kg/day mg/I mg/I Chemicals Status Reg.* I 10-kg Child Status One-day Ten-day Longer- term HA* mg/i mg/i mg/I Cancer Group at i0 Cancer Rkk I__ ...-. - Terbacil - - - F 0.3 0.3 0.3 0.9 0.013 0.4 0.09 - E Terbufos - - - F 0.005 0.005 0.001 0.005 0.00013 0.005 0.0009 - D Tetrachloroethane (1,1,1,2-) L - - F 2 2 0.9 3 0.03 1 0.07 0.1 C Tetrachloroethane (1,1,2,2-) L - - D - . - - - - - - . Tetrachioroethylene F zero 0.005 F 2 2 1 5 0.01 0.5 - 0.07 - Tetranitromethane - - - D - - - - - - - . Toluene F 1 1 F 20 2 2 7 0.2 7 1 - D Toxaphene F zero 0.003 F 0.5 0.04 - - 0.1 0.0035 - 0.003 B2 2,4,5-TP F 0.05 0.05 F 0.2 0.2 0.07 0.3 0.0075 0.3 0.05 - D 1 ,1,2-Trichloro-1 ,2,2- trifluoroethane - - - • - - - - Trichloroacetic acid L - - D - - - - - - - - - Trichloroactonitrile L - - D 0.05 0.05 - - - - - - TrichlOrobenzene (1,2,4-) P 0.07 0.07 F 0.1 0.1 0.1 0.5 0.01 0.4 0.07 - D Trichlorobenzene (1,3,5-) - - - F 0.6 0.6 0.6 2 0.006 0.2 0.04 - D Trichloroethane (1.1.1-) Trichloroethane (1,1,2-) F 0.2 0.2 F 100 40 40 100 0.035 1 0.2 - D C P 0.003 0.005 F 0.6 0.4 0.4 1 0.004 0.1 0.003 - Trichloroethanol (2,2,2-) L - - - - - - - - - - - - Trichlorqethylene F zero 0.005 F - - - - - 0.3 0.3 B2 Trichlorophenol (2,4,6-) L - - 0 - - - - - - - 0.3 B2 Trichloroproøane (1.1,1-) - - - D - - - - - - - - - - Trichloropropane (1,2,3-) 1 - - F 0.6 0.6 0.6 2 0.006 0.2 0.04 - Trifluralin . Trimethylbenzene (1,2,4-) L - - F 0.08 0.08 0.08 0.3 0.0075 0.3 0.005 - C - - - D - - - - - - - - . Trimethylbenzene (1,3,5-) - - - I D - - - - - - - - - Trinitroolycerol - F 0.005 0.005 0.005 0.005 - - 0.005 - — Trinitrotoluene - - - F 0.02 0.02 0.02 0.02 0.0005 0.02 0.002 0.1 C Vinyl chloride F zero 0.002 F 3 3 0.01 0.05 - - - 0.0015 f A White phosphorus - - - F - - - - 0.00002 0.0005 0.0001 - I 0 Xylenes F 10 10 1 F 40 40 40 1100 2 60 10 - L..Q Under review. ------- AnrIl 1992 Prn i R • Under review. Copper action level 1.3 mg/I teed - action level 0.015 mg/I U Iik A,k.... . chemicals Status MCLG MCL Reg. (mg/I) (mg/I) I 0-ka Child Status HM I One-day Ten-day mg/I mg/I longer- term mg/I 70.kn Adult Longer- term RID DWEL. Lifetime mg/I mg/kg/day mg/I mg/I at i0- Cancer Group mg/I Cancer Rlek INORGANICS Aluminum Ammonia Antimony Arsenic L - - - - - P 0.003 0.01/0.005 - 0.05 D D C) 0 . - - - - - - 0.015 0.015 0.015 • * - . - - - - - - - - 30 - 0.015 0.0004 0.015 0.003 - - - - - 0.002 - D C) A Asbestos (fibers/I > lOum lenath) F 7 MFL 7 MFL - - - - Barium F 2 2 F • - - Beryllium P zero 0.001 D 30 30 4 Boron L - - D 4 0.9 0.9 Cadmium F 0.005 0.005 F 0.04 0.04 0.005 Chioramine L - - D j 1 1 1 - - - - 700 MFL - 0.07 2 2 - 20 0.005 0.2 0.0008 3 0.09 3 0.6 - 0.02 0.0005 0.02 0.005 - 1 0.1 3.3 2.6 - 0 B2 C) D Chlorate Chlorine Chlorine dioxide Chlorite Chromium ttotal) I - - I - - I L - - I - F 0.1 0.1 0 - - - I - - - - - D - - - I - - - - C) - - - - - - - . 0 - - - I - - - - F J - 1 1 01 0.8 0.005 0.2 0.1 - - - - Copper P 1.JT Cyanide P 0.2 0.2 Fluor lde F 4 4 lead (at tap) I F zero TT j anaanese - - - - J - - I - - • - F 0.2 0.2 0.2 0.8 0.022 0.8 0.2 - - I - - I • 0.12 - - - - I - - - I - - - - D - - - - 0.14 - - o D - B2 I__. Mercury org.n1cI Molybdenum p 1 sckei Nitrate(asN) P lit riteIasN ( F 0.002 0.002 F - - - I . - D - - - i 0.1 0.1 F 1 1 0.5 F 10 10 F - 10 - F 1 1 (_F - 1 - 0.002 0.0003 0.01 0.002 - - 0.005 0.175 0.035 - 1.7 0.02 0.6 0.1 - - 1.6 - - - O.16 - - D D D . ------- Anril 1992 U I+I’s A Paq9 9 Chemicals tuuwcflJ Status MCLG MCI Reg.’ (mg/i) (mg/i) bolt!, rI I 10-kg Child Longer- Statusf One-day Ten-day term HA* mg/i mg/I mg/i 4.baUl,00 70-kg Adult Cancer Group Longer- mg/i term RfD DWEL Lifetime at 1O mg/i mg/kg/day mg/I mg/i Cancer Risk Nitrate + Nitrite (both as N) Selenium Silver Sodium I Strontium F 10 10 F 0.05 0.05 - - - - - - L I - - F - D D D - - - - - - I 0.2 0.2 0.2 I - - - j_ 25 25 25 - - - - - * - 0.005 - - - I - 0.2 0.005 0.2 0.1 - 0 - - 20*** - - - 90 2.5 90 17 - Sulfate P 400/500 400/500 I - - - - - - - - - Thallium P 0.0005 0.002/ 0 0.007 0.007 0.007 0.02 0.00007 0.002 0.0004 - 0.00 1 Vanadium L - - 0 0.08 0.08 0.03 0.11 0.003 0.11 0.02 - Zinc L - - 0 I - - - I - 0.3 10.5 2i - Zinc ch’oride (measured as Zinc) L - - I 0 - - - - 0.3 10.5 2.1 - - - 0 D RADIONUCLIDES Beta particle and photon activity (formerly man-made radionuclides) I F zero 4 mrem - I - - - - - - - 4 mrem/y A Gross alpha particle activity F zero 15 pCi/I I - I - - - I - - - - - A Racj um 226/228 P zero 20 pCi/L I - I - - - I - - - - 22/26 pCi/I ( A Radon P zero 300 pCi/L I - I - - I - - - - 150 pCi/I A Uranium I P zero 20 pg/i I - - - - - - - - 170 gCi/1 I A * Under review. Guidance. ------- SECONDARY MAXIMUM CONTAMINANT LEVELS Status Codes: P proposed, F - final F F F F F F 3 threshold odor numbers 6.5 - 8.5 0.10 250 500 5 ApnI 1992 I Status Paae 10 SMCLs I (mn/I) . .o.. .u uo - - — - Aluminum F Chloride F Color F Copper F Corrosivitv F 0.05 to 0.2 250 15 color units 1 non-corrosive Fluoride’ Foaming Agents Hexachlorocyclopentadiene Iron Manganese F F P F F 2 0.5 0.008 0.3 0.05 Odor pH Silver Sulfate Total Dissolved Solids (lOS) Zinc ______ Under review. ------- MICROBIOLOGY Status MCLG MCL Cryptosporidium L - Giardia Iambi/a F zero IT Legionella Fa zero TT Standard Plate Count F’ NA TI Total Coliforms (after 12/31/90) F zero ** Turbidity (after 1 2/31/90) F NA PS Viruses Fa zero IT Key: PS, IT, F, defined as previously stated. : Final for systems using surface water; also being considered for regulation under groundwater disinfection rule. ------- |