Prevention
United States	Pesticides and	EPA 734-12-92-001
Environmental Protection	Toxic Substances September 1992
Agency	(H7507C)
&EPA Pesticides In Ground Water Database
A Compilation Of Monitoring Studies: 1971-1991
National Summary
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Pesticides in Ground Water Database - 1992 Report
Mention of trade names, products, or services does not
convey, and should not be interpreted as conveying,
official EPA approval, endorsement, or
recommendation.

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For sale by the U.S. Government Printing Office
Superintendent of Dtxumcnis. Mail Ship. SSGK Washington. IX 20402-9328
ISBN 0-16-036265-2

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Pesticides in Ground Water Database -1992 Report
Pesticides in Ground Water Database
A Compilation of Monitoring Studies: 1971 - 1991
National Summary
Office of Pesticide Programs
Environmental Fate and Effects Division
Environmental Fate and Ground Water Branch
Henry Jacoby, Chief
Pesticide Monitoring Program Section
Constance Hoheisel
Joan Karrie Susan Lees
Leslie Davies-Hilliard Patrick Hannon
Roy Bingham
Ground Water Technology Section
Elizabeth Behl
David Wells Estella Waldman
September 1992

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Pesticides in Ground Water Database - 1992 Report, National Summary
CONTENTS
INTRODUCTION AND OVERVIEW 								 OV-1
NATIONAL SUMMARY 			NS-i
MAPS BY REGION 				NS-9
GRAPH 1: WELL DATA BY STATE 	 NS-21
GRAPH 2; WELL DATA BY PESTICIDE			 NS-33
Pesticide Detections 						NS-35
Non-Detected Pesticides 							 NS-49
TT A TIT C 1* nrrT T r\ A TP A tiv DtiCTir,l I'VE?	"MC CQ
JL ADLiC JL * TV £*1 4 iJ t\. X *\ E* 1 Jl ijiWiZr J. JL \m> 1
TABLE 2: WELL DATA BY STATE 						 NS-173
APPENDICES
Pesticide Cross-Reference Table 	Appendix 1-1
National Survey of Pesticides in Drinking Water Wells ............ Appendix II-1

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I INTR0DUCn0N
The U.S. Environmental Protection Agency/Office of Pesticide Programs (EPA/OPP)
is responsible for protecting human and environmental health from unreasonable risk due
to pesticide exposure. Monitoring efforts carried out during the last decade have shown that
the nation's ground water can become contaminated with pesticides, particularly in areas
with high pesticide use and vulnerable aquifers. Therefore, OPP has taken a strong
preventive approach to the protection of this valuable resource. Regulatory activities have
evolved to include, as a condition of registration or re-registration, a more rigorous
evaluation of a pesticide's potential to reach ground water. OPP has also formed strong
partnerships with other federal and state agencies responsible for various aspects of ground-
water protection.
The Pesticides in Ground Water Database (PGWDB) was created to provide a more
complete picture of ground-water monitoring for pesticides in the United States. It is a
collection of ground-water monitoring studies conducted by federal, state and local
governments, the pesticide industry and private institutions. It consists of monitoring data
and auxiliary information in both computerized and hard-copy form. This report. Pesticides
in Ground Water Database -- A Compilation of Monitoring Studies: 1971 -1991, was prepared
to summarize and share the results of the studies in the PGWDB. It consists of 11 volumes:
a National Summary and ten EPA regional summaries. Each volume provides a detailed
description of the computerized PGWDB and a guide to reading and interpreting the data.
The data are presented as maps, graphs and tables.
These data are extremely valuable, but must be interpreted carefully. In general, the
PGWDB provides an overview of the ground-water monitoring efforts for pesticides in the
United States, the pesticides that are being found in the nation's ground water, and the
areas of the country that appear to be vulnerable to pesticide contamination.
When viewed as a whole, it might appear the data gathered for this report are
representative of the United States and/or of general drinking water quality. This is not
necessarily the case. For example, many studies included sampling of aquifers that supply
drinking water, however these samples were usually taken at the well, not at the consumer's
tap. Therefore, conclusions concerning finished water can only be drawn by careful
examination of the data on a study by study basis. In addition, ground-water monitoring
programs vary widely in sampling intensity and design from state to state. Not surprisingly,
the states that sampled the greatest number of wells were often those that found the
greatest number of contaminated wells. This should not be misconstrued to mean that the
ground water in these states is more contaminated than that of other states, or that all
ground water in these states is contaminated. On the contrary, an active, supported
sampling program generally indicates a high regard for ground-water quality.
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The database and this report are the result of the efforts of a great many individuals,
significant among whom are the state officials and principal investigators who gave
generously of their time to provide OPP with information concerning their work. In
publishing this report, OPP intends not only to provide data, but also to identify points of
contact, in order to share expertise among those responsible for the protection of the
nation's ground-water resources.
To make this information available to as many decision makers in state and other
federal agencies as possible, the computerized portion of the PGWDB will become a part
of the Pesticide Information Network (PIN).1 The PIN is a computerized collection of files
that contain pesticide monitoring and regulatory information. The PIN functions much like
a PC-PC bulletin board and can be accessed by anyone with a computer and a modem. The
PIN is currently undergoing an expansion that will allow new types of information to be
included and increase the number of simultaneous users. The new PIN will be available in
1993 and will contain the PGWDB, environmental fate chemical/physical parameters for
pesticides, pesticide regulatory information (Restricted Use, Special Review, canceled and
suspended) and a certification and training bibliography.
II. THE ROLE OF PESTICIDE MONITORING
The Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) requires EPA to
monitor the environment for pesticide residues [section 20, parts (b) and (e)]. The primary
goal of pesticide monitoring is to improve the soundness of FIFRA risk/benefit regulatory
decisions by providing information on the concentrations of pesticide residues and the
effects that exposure to these residues have on human health and the environment. In
addition, long-term changes in environmental quality can be detected through the analysis
of monitoring data. OPP can use this information to measure the effectiveness of regulatory
decisions and to indicate potential environmental problems.
EPA has directly sponsored some large-scale pesticide monitoring projects, such as the
National Monitoring Programs of the 1970s2 and the recent National Survey of Pesticides
in Drinking Water Wells.3 This type of monitoring is intended to provide information on
a national level involving large numbers of pesticides. It does not provide information
concerning localized problems or long-term trends. This method of data gathering is also
extremely resource-intensive. An alternative approach for OPP is to support and gather
information from monitoring studies performed by others. Since the responsibility for
protecting the nation's ground water is shared by federal and state governments, OPP's data-
handling responsibilities not only include procuring the most current information for its own
needs, but also sharing this information with its partners in state and federal agencies. The
development of the Pesticides in Ground Water Database is a step in this direction.
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III. BACKGROUND
OPP began collecting ground-water studies for the PGWDB in the early 1980s. In 1988,
an effort was made to review and catalog these data. Summary results of this effort were
computerized and then published in the Pesticides in Ground Water Database: 1988 Interim
Report.4
Since the 1988 Interim Report was issued, many things have changed. State-sponsored
projects, initiated in the late 1980s, have been completed and digitized, monitoring
methodologies and computer technology have improved, and the quality and quantity of data
have increased. Based on extensive use of the 1988 database by OPP's Ground Water
Technology Section and the comments received from other users, both within and outside
of OPP, the computerized database and the hard-copy report were restructured. The new
computerized structure is more appropriate for the quality and quantity of the information
currently available, as well as for that expected in the future. The new structure is both well
and sample specific; that is, it contains description and location information for each well
sampled and the results of each analysis. This structure allows ground-water monitoring
data to be sorted in a variety of ways, such as by well depth, well location, and sampling
date. The new report structure provides national, regional, state and county summaries so
that readers can select the resolution appropriate for their needs.
Most of the data in the PGWDB have been produced directly by state agencies or by
private institutions that are sponsored by federal or state agencies. Some pesticide industry-
sponsored studies have also been included in the PGWDB. These studies were conducted
to support the registration status of a particular pesticide and were generally conducted in
areas that are vulnerable to ground-water contamination by pesticides.
The database is a compilation of data submitted in several different formats, including
computerized and hard-copy sampling results as well as hard-copy reports containing study
descriptions and summary information. Many states are now routinely storing their data in
computerized form and have shared their data with OPP. Some of the hard-copy data are
from older studies that were never computerized. Some are from studies that have been
computerized, but OPP has not yet been able to obtain the data. OPP is also retaining
hard-copy final reports for as many studies as possible. These reports provide vital
information such as study design, well design, analytical methods, quality control and
environmental conditions.
The focus of the PGWDB is quite narrow. It contains only ground-water monitoring
data in which pesticides were included as analytes. Therefore, the PGWDB does not
replicate STORET5 or WATSTORE6. While these large databases contain some pesticide
monitoring data and some ground-water data, their primary focus is general water quality.
As a result, these databases contain a great deal more information about water quality, but
lack many of the pesticide focused studies that are included in the PGWDB. Many states
have used STORET to store water-quality data, including analyses for pesticides. STORET
data were downloaded and added to the PGWDB when the data could be directly
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associated with specific study summaries or reports sent to OPP by state agencies. These
state agencies provided their agency code, station codes, parameter codes, sampling dates
and other pertinent information so that the correct data could be extracted from STORET.
Data from the National Survey of Pesticides in Drinking Water Wells (NPS)3 have not
been included in PGWDB, since these data have been recently and extensively presented
elsewhere. We are currently working on electronically transferring the results of the NPS
pesticide analyses so they will be available when the PGWDB becomes part of the PIN.
IV. THE COMPUTERIZED DATABASE
The computerized database consists of three files related to each other by study
identification and unique well number. The first file contains information describing the
study, the second contains information describing each well and the third contains sample
information. Data elements stored in these files are presented in Figure 1. These data
elements are based on EPA's recommended minimum set of data elements for ground-water
monitoring published in Definitions for the Minimum Set of Data Elements for Ground-Water
Quality, July 22, 1990*
FIGURE 1. Data Elements for the Pesticides in Ground Water Database
STUDY PttS |

SAHPIF FILE
Study Number
Study Number(s)
Study Number
Study Title
Unique Wei 1 Nwfcer1
Unique Well Nunber1
Sponsoring Agency(ies)
7
State and County FIPS Codes
7
Pesticide
Project Officer(s) (PO)
3
Latitude and longitude
Concentration (ug/l)
PO Address(es)
Depth to Water Table (m)
Limit of Detection (ug/L)
PO TelephoneCs)
Well Depth (m)
Sample date
USEPA Region
Depth to Top and Bottom of Screen
Interval Cm)
Analytical Method®
Starting and Ending Dates
4
Well Type
Origin of Contamination9
Publication Date
5
Well Log S Other Information

Abstract
Altitude^
1.	This is a unique identifier assigned to each well in the well file. Many stales have assigned a unique
identifier to wells sampled. In these cases, the number was retained, and used in the PGWDB as thai well's
unique weli number.
2.	The Federal Information Processing Standard (FIPS) alphabetic or numeric cixles for states (example MI
is the alphabetic code for Michigan, 26 in the numeric code for Michigan), County codes are three digit
numeric codes.
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3.	Coordinate representations that indicate a location on the surface of the earth using the equator (latitude)
and the Prime Meridian (longitude) as origin. Coordinates are measured in degrees, minutes, and seconds
with an indicator of north or south, and east or west.
4.	Wells have been classified as follows:
Drinking water public community - a system of piped drinking water that either has at least 15 service
connections or serves at least 25 permanent residents.
Drinking wafer public non-community - wells serving public facilities such as fire stations, schools, or
libraries.
Drinking water private - privately owned wells serving a residence or farm.
Non-drinking water monitoring - wells installed specifically for monitoring ground water.
Non-drinking water other - wells used for irrigation, industrial application, etc.
5.	This field will allow storage of limited well log or other information about the well, such as construction
details.
6.	The vertical distance from the National Reference Datum to the land surface or other measuring point in
meters.
7.	Pesticides are tracked by their Chemical Abstracts System (CAS) number. There is also a cross-reference
file that contains all pesticide synonyms and other OPP reference numbers. Any chemical that is currently
or has ever been registered as a pesticide by the USEPA, Office of Pesticide Programs is eligible to be
included in the PGWDB. Some chemicals might be more commonly associated with industrial processes;
however, if these chemicals are now or were previously registered and used as pesticides, monitoring results
will be included in the database.
8.	A short name, reference or description of the analytical method which was used. This field is not intended
to hold the entire method.
9.	An origin of contamination is listed for each analysis performed as follows:
NFU - Known or suspected normal field use
PS - Known or suspected point source
UNK - Unknown source of contamination
These files will be available through the PIN in 1993. The data management software
for this system is ORACLE running under UNIX. However, OPP will accept and translate
data created in nearly any format, operating system or medium. To access the PIN, contact
User Support at 703-305-7499.
V. THE 1992 PESTICIDES IN GROUND WATER DATABASE REPORT
The 1992 PGWDB report is a summary and presentation of all the data OPP currently
has available, both in computerized and in hard-copy form, concerning pesticides in ground
water. The report is organized as a National Summary and ten EPA regional summaries.
Each volume provides background information on pesticide monitoring, a description of the
computerized portion of the database and a guide to reading and interpreting the data
presented in the report.
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The National Summary contains summary results of the data collection effort for all
states and a discussion of the data. The regional volumes contain data from the individual
states in each EPA Region. Each regional volume contains state summaries, which consist
of: 1) a short overview of the state's philosophy and pertinent regulations concerning
ground-water quality and pesticides, 2) a summary of each study or monitoring effort sent
to OPP, and 3) summary data for each state presented in tables, graphs and maps. In
essence, the study summaries were written by the principal investigators of each study.
Whenever possible, the author's abstracts, summaries and conclusions were reproduced
verbatim, so that the tone and intent of their work would not be misinterpreted.
There are two appendices in each volume of the report. Appendix I contains a
Pesticide Cross Reference Table, which provides pesticide names, synonyms and the
regulatory status and lifetime Health Advisory (HA) Level or Maximum Contaminant Level
(MCL)7 for each pesticide. Appendix II provides a brief overview and reference information
for the NPS.
Summary and Presentation of Ground-Water Monitoring Data
The data in this report are presented in three different formats: maps, graphs and
tables. Their format and content are explained below. Each format is displayed at four
different resolution levels: national, regional, state and county. The charts and maps were
intended to provide an "at-a-glance" visual summary of the information collected for the area
in question. The tables provide detailed information concerning sampling dates, numbers
of wells sampled, samples analyzed, concentration ranges, and the relationship between
pesticide concentrations and current EPA drinking water standards.
1.	Maps
The maps presented in this report display the number of wells sampled and the number
of wells with pesticide detections. Map legends are consistent throughout the report to
assist in any visual comparison of the maps. A regional-scale map illustrating the
frequency of pesticide detections as a function of the total number of wells sampled is
presented at the beginning of each EPA regional volume. The regional maps display
information for each state in that EPA region. All of the regional maps are included
in the National Summary. In addition, a state- scale map, in which the data are
presented at the county level, is included with each state summary. State maps are also
annotated with a list of pesticides detected in that state.
2.	Graphs
Bar graphs, for each state within a region, illustrate the number of wells sampled, the
number of wells with pesticide detections, and the number of wells with pesticide
detections exceeding the MCL or lifetime HA. The graphs present this information
ranked in descending order by the number of wells with pesticide detections. The
version of this graph in the National Summary displays this information for each state.
A similar graph in each EPA regional volume presents data only for the states in that
region. The National Summary contains an additional graph, illustrating the above
information by pesticide. Pesticides for which analyses were performed but were not
detected in any wells are listed alphabetically at the end.
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3. Tables
Two basic data tables are used throughout this report to summarize ground-water
monitoring information: the "Pesticides" table and the "Wells" table. Figures 2 and 3
provide a detailed explanation of the information contained in each column for the two
standard tables. The numbers that occur in the field descriptors correspond to the
definitions listed below the example table.
The "Pesticides" table is illustrated in Figure 2, In this table, information is organized
by pesticide. The monitoring locations, sampling frequencies, number of wells
monitored, sampling results and concentration ranges are provided. In the National
Summary, this table details the monitoring location to the state level and also includes
the regulatory status for each pesticide. In the regional volumes, monitoring location
is provided to the county level for each state and the table is expanded to include
monitoring data for samples taken from each well.
FIGURE 2. Pesticides Table
PESTICIDE SAMPLING IN THE STATE Of



WELL RESULTS
SAMPLE R5SUITS
			
RMtG€ OF
COHC6K-
tttAtlQN
8
PESTICIDE
1
COUNTY
i
DATE
T>
tOTAL
WELLS
SAMPLED
4
* OP
POSITIVE
WELLS
5
TOTAL #
SAMPLES
6
NUMBER OF
POSITIVE
SAMPLES
7


YR/
HO

£
MCI
¦c
net

t
NCt
mt
Pesticide A
County A
1989/
1,3









1990/6









1987/
1-5






	—
County 8
TOTAL DISCRETE
WEILS OR SAMPLES


9
10
10
11
12
12

County A
1989









1990








County B
1987







TOTAL DISCRETE
WELLS/SAMPLES









GRAND TOTAL
DISCRETE
WELLS/SAMPLES


13
14
14
15
16
16

1 The tables are arranged in alphabetical order by the parent pesticide common name. Degradates of parent
pesticides are listed directly following the parent. Any chemical that is currently or has ever been registered as
a pesticide by the USEPA Office of Pesticide Programs is eligible to be included in these tables. Some chemicals
included in these tables are more commonly associated with industrial processes; however, these chemicals were
at some time also registered as pesticides.
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2 County names are listed in alphabetical order for each pesticide that was monitored.
2 Well sampling dates are given by year and month(s). Months separated by a comma (1,3) means that samples
were taken in these months only. Months separated by a dash (1-5) is the range of months in which sampling
occurred, samples were taken in all months within the range.
4	The total number of wells that were sampled at least once during the time period stated in the previous
column.
5	Wells with pesticide detections within the time period given in the date column (3). Wells with positive
analytical results were classified based upon whether the results were above or below the MCL. If a pesticide
did not have an established MCL, the lifetime HA level was used and noted at the end of the table. If neither
of these values weie established, the well was classified as less than ihe MCL. Wells were classified based upon
their highest analytical result. Therefore, any well with at least one positive analysis equal to or greater than the
MCL or HA during the time period listed in the dale column (3) was classified as > MCL. Any well with at least
one positive analysis but all analyses less than the MCL or HA was classified as < MCL.
J The total number of samples analyzed for that pesticide within the time period recorded in the date column.
2 Samples with pesticide detections were counted based upon whether the results were above or below the MCL
or lifetime HA as stated in 5 above.
8	The range of positive results in ug/L (ppb) for the time period specified in the date column,
9	The total number of discrete wells that were sampled at least once and analyzed for the pesticide listed in
column 1. *See Note
10	The total number of discrete wells in which the pesticide was detected based upon whether the results were
above or below the MCL. Wells were classified as explained in 5 above, based upon the highest analytical result.
11	Total number of samples analyzed for a particular pesticide.
12	The total number of samples in which the pesticide was detected that are > MCL or < MCL as explained
in 5 above.
12 The grand total of discrete wells sampled in the state for any pesticide. * See Note
14	The grand total of discrete wells with at least one detection of any pesticide. Wells are classified above or
below MCL or HA as explained in 5 above. *See Note
15	Grand total of samples taken in the state. 'See Note
16	The grand total of samples with any pesticide detection for the state. Samples were classified as > or < the
MCL based upon their highest analytical result as explained in 5 above. *See Note
*Note: Some wells were sampled more than once, (i.e.. during several successive years) and some wells were
sampled for more than one pesticide. Therefore, the total number of discrete wells is not necessarily the
arithmetic sum of the wells listed. Similarly some samples were analyzed for more than one pesticide, therefore,
the total number of discrete samples for the state will not be, in all cases, the arithmetic sum for the column.
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Figure 3 illustrates the "Wells" table. In this table, ground-water monitoring information
is organized by well type, or use, and source of contamination. In the National
Summary, the information is summarized by state. In the regional volumes, the
information is summarized by county for each state in the region.
FIGURE 3. Wells Table
STATE Of 	
HELLS BT COUNTY

trPES Of WELLS
SOURCE OF
CONTMMHATiflN
(NUMBER OF WELLS)
OS INK IK'S UATER
1
MOHtTOftlNG
--z¦
OTK«
3
county
TOTAL
SHPU>
4
i j «
mi I wet
S 1 s
:-:jJ a
¦ *?r £
- i
mi
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net
5;.:,
TOTAL
,$wu>
s
MCL :
• s- ;
<
HCL
;':o'5.K
XFU
*
PS
7
im
s
County *

1









County B

1









TOTAL 9

1


1






_1 Drinking Water wells include community (municipal), public non-community, and private wells. Public non-
community wells are those that exclusively serve public buildings such as fire stations, schools, or libraries.
2 Monitoring wells, installed solely lo monitor ground walcr for contaminants.
5 Other wells include: irrigation wells, stock watering wells, springs, and tile drains.
4 Total number of each type of well sampled in each county.
i The number of wells per county in which a pesticide was detected. Wells were classified based upon whether
the results were above or below an MCL for any of the pesticides detected. If a pesticide did not have an
established MCL, the lifetime HA level was used. If neither of these values were applicable, the well was
classified as less than the MCL and it was so noted at the end of the table. Wells were classified based upon
their highest analytical result. Therefore, any well with at least one positive analysis greater than or equal to the
MCL or HA was classified as > MCL. Any well with at least one positive analysis but all analyses less than the
MCL or HA was classified as < MCL.
Contaminated wells were placed in one of the following categories based on the opinion of the study director:
NFU = Known or Suspected Normal Field Use.
7 PS = Known or Suspected Point Source.
J UNK= Unknown source of contamination. Wells were categorized as "unknown" if the study director did not
know the source of contamination, or if there was no information available concerning the source of
contamination.
9 Total number of wells in each category.
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VI.	DATA INTERPRETATION
Ground-water monitoring data in this report have been assembled from numerous
sources, including state and federal agencies, chemical companies, consulting firms, and
private institutions that are investigating the potential for ground-water contamination by
pesticides. These data are extremely valuable, but must be interpreted carefully. In general,
the PGWDB provides a relatively comprehensive overview of the ground-water monitoring
efforts for pesticides in the United States, the pesticides that are being found in the nation's
ground water, and the areas of the country that appear to be the most vulnerable to
pesticide contamination.
Nationally, part of OPP's regulatory mission is to prevent contamination of ground-
water resources resulting from the normal use of registered pesticides. OPP routinely
reassesses the impact that registered pesticides have on the quality of ground-water
resources. The PGWDB will be used to support ongoing regulatory activities, such as
ground-water label advisories, monitoring studies required for pesticide re-registration and
special review activities. In addition, combining the information in the PGWDB with other
environmental fate data and usage data will assist OPP, at an early stage in the regulatory
process, in refining criteria used to identify pesticides that tend to leach to ground water.
On a state or local level, the PGWDB can be used as a reference so that a state may
access data from neighboring states. Evidence that pesticide residues occur in ground water
can be used to target a state's resources for future monitoring and to re-assess pesticide
management practices to prevent future degradation of ground-water quality. The
information presented in this report will also be useful to state and regional agencies when
implementing two pollution-prevention measures being developed by EPA; the Restricted
Use Rule and the State Management Plans outlined in the Pesticides and Ground Water
Strategy. Additional uses for the data in the PGWDB include identification of areas in need
of further study, identification of the intensity of monitoring for particular pesticides, and
graphic display of ground-water monitoring activities and localization of pesticide
contamination.
VII.	DATA LIMITATIONS
Despite their apparent value, these data do have limitations and must be used and
interpreted carefully. Differences in study design, laboratory procedures/equipment,
sampling practices, or well use can affect results. Some of the limitations governing the
interpretation of the data in the PGWDB are discussed below:
1) The PGWDB is not a complete data set of all ground-water monitoring for
pesticides in the United States. While we have attempted to include as many
sources as possible, other data exist of which we are not aware or to which we do
not yet have access.
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2)	Monitoring for pesticides in ground water has not been performed in a uniform
manner throughout the United States, Some states have extensive monitoring
programs for pesticide residues, while others have more limited monitoring
programs. In general, more extensive ground-water monitoring programs tend to
he found in the states where pesticide use is heavy. This creates a picture that does
not necessarily represent the overall impact of pesticides on ground-water quality
nationwide,
3)	Differences in ground-water monitoring study design can radically affect the results.
Many monitoring efforts were initiated in response to suspected problems, and
therefore yielded a disproportionately high number of positive samples. These
results cannot be extrapolated to represent a larger region or state. Other efforts
sampled a small number of wells or sampled under conditions in which
contamination was unlikely. Still others were statistically designed studies, intended
to be extrapolated to a specific population of wells. Each of these scenarios
presents a vastly different view of the condition of the ground-water resource
sampled.
4)	Analytical methods and limits of detection have changed over time, and also vary
from laboratory to laboratory. Therefore, comparisons between the results of
different studies and across several years must be performed carefully to avoid
errors in interpretation.
5)	Differences in construction, depth, location and intended use can greatly affect the
likelihood that a particular well will become contaminated by pesticides. Some of
these issues were addressed in the individual study summaries when such details
were available. However, this information was not always provided and tends to
be obscured when large amounts of data are summarized. The reader is cautioned
to read the study summaries carefully and interpret the resulting data summaries
conservatively.
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NATIONAL SUMMARY
I. INTRODUCTION
This section provides a summary of ground-water sampling for pesticides in the United
States. The data in this report represent sampling that occurred from 1971 to 1991; most
sampling was performed during the 1980s. A summary of all data collected is presented by
state and pesticide. This information can be found as maps, graphs and tables beginning
on page NS-9. More detailed information for each state and descriptions of the studies
from which these data were derived are available in the regional volumes.
II. RESULTS
The Pesticides in Ground Water Database currently contains data collected from 68,824
wells in 45 states. The vast majority of these were drinking water wells (65,865). Pesticide
(or pesticide degradate) residues have been detected in 16,606 wells (15,502 drinking water
wells) in 42 states. Nearly 10,000 of these contaminated wells had concentrations of
pesticides or degradates greater than EPA drinking water standards (MCL or Lifetime HA).
Figure 4 lists the states with the most intense sampling and the greatest number of
detections.
During the 20-year period covered in this report, ground water in the United States was
analyzed for the presence of 302 pesticide-related compounds. One hundred thirty- two were
detected and 35 were detected at concentrations ^MCL or Lifetime HA. The following
list provides more details: (Note that 4-Nitrophenol is both a registered parent pesticide and
a degradate of methyl parathion. This compound was counted in both categories.)
Total number of analvtes
302 pesticide-related compounds
258 parent pesticides
45 degradates
Found in 100 or more wells
23 pesticide-related compounds
21 parent pesticides
2 degradates
Found in at least one well
132 pesticide-related compounds
117 parent pesticides
16 degradates
Found in over 1.000 wells
7 pesticide-related compounds
5 parent pesticides
2 degradates
Regulatory restrictions have been placed on 54 of the pesticides found in ground water:
28 are no longer registered for use in the United States and 27 of those with active
registrations are designated as restricted use. An additional 6 pesticides have not been
supported by the registrant for re-registration. Thirty-four of the pesticides found in ground
water are or have been in the Special Review process.
Figure 5 lists the pesticide-related compounds detected in more than 100 wells in order
of number of wells with detections. The two most-often-detected pesticide compounds were
the degradates aldicarb sulfone and aldicarb sulfoxide. These degradates were found more
frequently than the parent compound, aldicarb. Figure 6 lists the 11 pesticide parents and

-------
their 16 degradates that had at least one degradate detected. DCPA acid metabolites, the
third-most frequently detected degradate group in the PGWDB, were also detected more
frequently than the parent, DCPA, and were the most frequently found of all pesticide
analytes in the National Pesticide Survey of Drinking Water Wells (NFS) (see Appendix II).
In most cases, degradates have only recently been included as analytes in ground-water
monitoring studies and far fewer welk have been sampled for the presence of these
compounds than for the parent. However, when sampling frequency is compared to the
number of detections, it can be seen that, of the 16 degradates in Figure 6, five occur at
frequencies greater than the parent, two occur at a frequency approximately equal to that
of the parent, and five occur about half as frequently as the parent. These data and those
of the NPS indicate that serious consideration should be given to including pesticide
degradates as analytes in studies designed to evaluate the impact of pesticides on ground-
water quality. The true impact on ground-water resources by some pesticides may only be
determined by examining both parent and degradates.
FIGURE 4. States with the Highest Sampling Frequency and Greatest Number of
Detections
" si



. ^ ¦
tells With
*¦16. «>6
Cunulativ*
X of IMUs
with £>»t«cts
ST
W*U$ uitfc
iMCt
M*9,911


Wits
Siwpled
*1*68,824 -
: Ottutativt
X of itell*
K»ttw*rfd»
Cumulative
% at MiM*
' wrth 0*f«cts
:: ^'jsMClUKvP.'
" W"
21,219
31

7,439
45
ST
5.763
58
: Ft
18,153
57
Ft
2.362
59
ft.
1.708
75
CA
10,325
72
CA
2,047
71
CA
1,136
86
cr..
2.661
76
CI
854
76
cr
481
91
ME
2,280
79

358
78
Ul
205
93
-Si.'.
1,826
82
ME
343
80
MA
138
94
.. «r:"
1,631
84
W!
342
82
rx
73
95
- m
1.462
86
NU
275
84
SI
58
96

926
87
MA
247
85
«
28
96
m
754
88
JA
216
86
at
27
96
HI
574
89
MS
200
87
UA
26
96
MA
571
90
m
192
88
DC
24
96
It
554
91
R!
157
89
«
24
96
J*
533
92
va
149
90
8A
23
96
HO
515
93
sc
134
91
(A
23
96

511
94
IK
134
92
m
21
96
HE
490
95
H!
125
93
NO
18
96
vr
446
96
MO
117
94
IN
17
96

446
97
Oft
114
95
Mb
16
96
m
325
97
XC
95
96
VA
15
96
NS-2

-------
FIGURE 5. Pesticides detected in more than 100 wells
>e»ticid»
U»Us
&t«d
WfrUt Mitt)
Detection*
*«e.
Statue
| Ptstics*
Wall*
Sanpted
U«U» with
fretectiont
Status
Aldicarb
iulfone
37,652
5,070

MetMfeuim
5,452
232

*ldicarb
sulfoxide '
37,193
4,991

HetolacJilor
22,255
213

Sarbofuran
28.020
4,127
R. SR
Pentaehtoroehenol
526
213
R, SR
Mdicarb
43,786
3.002
ft, SR
Biiroft
17,865
160
S

20,221
2,918
C
Cyan«l m
7,468
155
R, SR
08CP
20,545
1,829
c

23,250
154
R
jitrariae
26,909
1,512
R
l.i-t
6,142
141
SR

-------
III. DISCUSSION
When viewed as a whole, it might appear the data gathered for this report are quite
representative of the United States, since 45 states contributed data. This is not the case.
Ground-water monitoring programs vary widely in sampling intensity and design from state to
state. When the data are examined on a state-by-state basis (Figure 4), it can be seen that 90%
of all wells sampled can be found in only 12 states and only 8 states sampled 1,000 or more
wells. The states that sampled the greatest number of wells are New York, Florida, and
California; each sampled more than 10,000 wells. Together, these three states collected 70%
of the data in this report. Not surprisingly, 70% of the wells with pesticide detections and more
than 80% of wells with detections greater than the EPA drinking water health standards are also
located in these three states. This should not be misconstrued to mean that the ground water in
these three states is more contaminated than that of other states, or that all ground water in these
states is contaminated. On the contrary, an active, supported sampling program generally
indicates a high regard for ground-water quality.
The data in the PGWDB can provide an indication of where ground water has been
sampled, where additional sampling might be necessary and where contamination occurs in
relationship to the intensity of sampling. However, great care must be exercised when
attempting to use these data to characterize the status of ground-water quality resulting from
pesticide use nationally or at the state level. This can be demonstrated by examining the data
from several states more closely.
In California, 20% of the 10,000 wells sampled were contaminated with pesticides;
however, the vast majority of wells sampled and wells with detections in California occurred in
Fresno, Kem, Los Angeles and San Bernardino counties. Relatively few wells were sampled
in the more than 50 other counties in California. Because the majority of sampling occurred
where agricultural pesticide use is high, the proportion of wells with detections very likely
exaggerates the extent of contamination statewide. New York sampled a very large number of
wells and a relatively large portion (35%) of these wells were contaminated, but 99% of the
wells sampled, and 99% of the wells contaminated with pesticides are in Suffolk County. A
large-scale sampling program was initiated in Suffolk County after aldicarb residues were found
in drinking water wells in agricultural areas. This sampling pattern drastically skews the impact
of pesticides on ground-water quality in New York. Similarly, approximately 23% of the wells
sampled in Iowa contained pesticides. However, much of Iowa's early ground-water sampling
was performed in heavy pesticide-use areas with alluvial aquifers that are very vulnerable to
contamination. In 1988-89, when Iowa conducted a statistically designed survey of rural wells
throughout the entire state, only about 14% of the wells sampled were contaminated with
pesticides. The monitoring scenarios from these states are not unlike situations in many other
states. They are presented here to underscore the importance of factors such as sampling
intensity and spacial distributions on the overall monitoring results.
NS-4

-------
These s.iT.t cautions must be exercised when ranking pesticides by frequency of
detection. These data are useful when placing pesticides in general groups; however, the
absolute position of one pesticide in relation to another is strongly affected by factors such as
sampling frequency, spatial distribution and detection limits.
The PGWDB is a collection of isolated studies. Many anomalies occur in these data that
make interpretation difficult. Monitoring for some of the pesticides reported in this database
occurred primarily or exclusively in one state and sometimes only in a small area of that state.
Readers are strongly encouraged to use these data carefully and not to over-interpret them. This
is not because the individual datasets are poor; on the contrary, the vast majority of the studies
were carefully planned and well executed. Rather, it is because the datasets were not necessarily
meant to be combined. To make the best use of these data, examine the regional volumes of
this report. These more detailed volumes will provide additional insight into sampling areas,
sampling dates and study designs.
IV. THE FUTURE
The vulnerability of ground water to contamination by pesticides depends upon a variety
of factors including depth, topography, soil, climate, pesticide use and pesticide application
practices. In some cases, ground water is shallow or closely connected with surface water and
the results of surface activities can be observed within months. More often, contamination is
not observed for many years, allowing cause-and-effect relationships to become obscured. This
report, for the most part, is a retrospective examination of the agricultural practices of the 1960s
and 1970s, the results of which were observed through monitoring performed 20 years later.
The condition of our ground-water resources for the next 20 years will be greatly affected by
how we are handling our chemicals now. Our challenge today is clearly prospective.
EPA's Office of Pesticide Programs (OPP) is planning to publish a summary report of
the data in the PGWDB on approximately a yearly basis. We are interested in presenting the
data in a manner that is the most helpful to as many users as possible. The following are areas
in which we would like to receive comments:
1.	Should future reports summarize only "new data" (those received since the last
report) or all of the data? Should we continue to report very old monitoring data
(10 to 20 years), given the fact that some of these studies had very high detection
limits and monitored for pesticides that are no longer of regulatory interest?
2.	What changes should be made to the maps, graphs and tables? Are they too
detailed or not detailed enough? Are important pieces of information missing?
Is there a clearer or more useful way to present these data?
3.	How are those outside of OPP using the PGWDB?
NS-5

-------
We appreciate all of those who took the time to comment on the draft version of this
report. Many of the suggestions offered were included in this final version. However, some
very good suggestions regarding changes to the tables could not be included in this report due
to time constraints. These suggestions were taken seriously and will be considered for future
reports.
For the PGWDB to retain its value, OPP must continue to gather and share as much
pesticide monitoring information as possible. Any government agency or private institution that
would like to have its work included in the PGWDB should provide a hard copy of a final or
interim report and the sample and well data in electronic format. PGWDB data elements are
listed on page OV-4 of this report. Electronic media should be accompanied by a description
that includes, hardware compatibility (IBM, Apple etc.), operating system (DOS, UNIX, OS2),
format identification (ASCII or software package name) and a data dictionary. Anyone wishing
to provide comments or data may do so by contacting:
Constance A. Hoheisel
U. S. Environmental Protection Agency
Office of Pesticide Programs
Environmental Fate and Effects Division (H7507C)
401 M Street, SW
Washington, DC 20460
Telephone: 703-305-5455
FAX: 703-305-6309
NS-6

-------
REFERENCES
1.	Hoheisel, C. and Davies-Hilliard,L. Pesticide Information Network.U.S. Environmental
Protection Agency, Office of Pesticide Programs, Washington D.C., 1987, Database:
703-305-5919. User Support: 703-305-7499.
2.	Spencer, D.A. The National Pesticide Monitoring Program, U.S. Environmental
Protection Agency, 1974. Summary document published by The National Agricultural
Chemicals Association.
3.	U.S. Environmental Protection Agency. The National Survey of Pesticides in Drinking
Water Wells. Washington, D.C., 1990. For Fact Sheets contact: EPA Public
Information Center, 202-260-2080. For copies of reports contact: National Technical
Information Service (NTIS), 703-487-4650.
4.	Williams, W.M., Holden, P. W., Parsons, D. W. and Lorber, M.N Pesticides in Ground
Water Data Base-1988 Interim Report. U.S. Environmental Protection Agency, Office
of Pesticide Programs (H7507C), Washington, D.C.,1988.
5.	U.S. Environmental Protection Agency, Office of Information Resources Management
STORET (Water Quality Database). Washington, D.C. User assistance: 1-800-424-
9067.
6.	U.S. Geological Survey, National Water Data Exchange. WATSTORE(Water Quality
Database). Reston, VA. For further information: 703-648-5671.
7.	U.S. Environmental Protection Agency, Office of Water. Drinking Water Regulations and
Health Advisories. Washington, D.C., November 1991. Tel: 202-260-7571.
8.	U.S. Environmental Protection Agency, Office of Ground Water and Drinking Water
Definitions for the Minimum Set of Data Elements for Ground-Water Quality.
Washington, D.C.,1991.
9.	U.S. Environmental Protection Agency, Office of Pesticide Programs, Status Of
Pesticides In Reregistration And Special Review, (Rainbow Report)., Washington, D.C.,
March 1992.
Author and reference information for the studies used to compile this National Summary
can be found in the appropriate PGWDB regional volume.
NS-7

-------
Intentionally Blank Page

-------
Pesticides in Ground Water Database -1992 Report
MAPS: BY EPA REGION

-------
Intentionally Blank Page

-------
WeiI Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Wells Sampled)
192/490

^47/071
1^7/1026
854/2661
Total Wells Sampled
per State
¦	> 1003
m	501 to 1003
E2	101 to 503
ED	51 to 100
E3	1 to 50
~	No wells sampled
NS-11

-------
Well Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Wells Sampled)
ion
k'> i
05/243
Total Wells Sampled
per Sta te
501
lei
51
>
t 3
to
tc
to
1230
1000
530
130
~ No wells samp 1?c
NS-12

-------
Well Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Wells Sampled)
%
DE
m
32/36
149/211
Total Wells Sampled
per State
m	> i?m
S3	501 to 1300
E2	101 to 500
(7]	SI tn 1Rpi
E3	1 to 5P
~	No wells 5anpled
NS-13

-------
Well Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Wells Sampled)
3 "V
Region I\
14/117
88/148
105/143
:0/24:liil:^8oO§^§9? -
Total Wells Sampled
per St a ie
¦	> 1033
501 to 10B0
K3 101 to 533
T7\ 51 to 133
•33 1 t u 50
CI No we!ia sanpted
2240/15642k
WA		
NS-14

-------
Welt Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Weils Sampled)
Total Weils Sampled
per State
¦ > 1eou
ESS	BR1 1C 1003
C3	101 t z 50k!
E3	51 tc 100
E3	1 tc 50
~	No wells sanplec
'Region
<375/754
342/1631
12/39
OH
350/1462
11/032
73/554
NS-15

-------
Well Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Wells Sampled)
egion

Total Wells Sampled
per State
m >1800
m 501 to i000
E3	101 to 500
E)	51 to 100
E3	1 to 50
n	Nn wpIIs samp 1pd
NS-16

-------
Well Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Wells Sampled)
Region VII

IA
216/928
343/2280
Ksm
<>Xx x3f>/214
117/324
v>Cv*V->?v*aX>v<
Total Wells Sampled

per
State
¦

> 1008

501
tn 1300
03
101
to 500
7J
51
In 100
m
1
10 50
n
Nn wp
.Js sprnn

NS-17

-------
Well Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Weils Sampled)
o
ND
31/467
MT
25/114
64/99/////
Total Wells Sampled
per State
> 1000
501 to 1000
101 to 500
51 t o 1
1 to 50
Nq wells sample
NS-18

-------
Well Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Wells Sampled)
CA
2O16/1032C
1/38;:
' | "v	<0	~W~ "X "Y"
Region IX
Hawaii
125/574
Total Wells Sampled
per State
m	> 1000
esa	50i to 1000
Q	101 to 500
E)	51 to 100
E3	1 to 50
~	No wells sampled
NS-19

-------
Well Sampling by State
(Total Number of Wells with Pesticide Detections / Total Number of Wells Sampled)
^XX X
WA
59/13S
X
'mwm
gion X
¦r -->s
AK
• VsO,
Total Wells Sampled
per 5ta te
E3
501
iei
51
1
> 1000
to 1003
to
to
to
503
103
Nn wells sar-plPfl
NS-2 0

-------
Pesticides in Ground Water Database - 1992 Report
GRAPH 1: WELL DATA BY STATE
4

-------
Intentionally Blank Page

-------
WELL M0NI1ORING BY STATE
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
NEW YORK
FLORIDA
CALIFORNIA
CONNECTICUT
OHIO
7,439
21,219
18.153
1,136
2,047
10,325
5,000 10,000 15,000 20,000
NUMBER OF WELLS
25,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
NS-23

-------
WELL MONITORING BY STATE
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
NEBRASKA
WISCONSIN
MINNESOTA
MASSACHUSETTS
IOWA
2,280
500 1,000 1,500 2,000 2,500
NUMBER OF WELLS
3,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
NS-24

-------
WELL MONITORING BY STATE
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
MISSISSIPPI
MAINE
RHODE ISLAND
VIRGINIA
SOUTH CAROLINA
500	1,000	1,500	2,000
NUMBER OF WELLS
2,500
WELLS WITH DETECTIONS » MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
NS-25

-------
WELL MuNITORING BY STATE
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
TEXAS
HAWAII
MISSOURI
I18
325
OREGON
NORTH CAROLINA
0 100 200 300 400 500
NUMBER OF WELLS
600 700
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
NS-26

-------
WELL MONITORING BY STATE
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
GEORGIA
ILLINOIS
SOUTH DAKOTA
PENNSYLVANIA
WASHINGTON
100 200 300 400 500
NUMBER OF WELLS
600 700
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
NS-27

-------
WELL MONITORING b ( STATE
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
NEW JERSEY
WYOMING
MARYLAND
INDIANA
KANSAS
0	100 200 300 400 500 600 700
NUMBER OF WELLS
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
NS-28

-------
WELL MONITORING BY STATE
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
DELAWARE
NORTH DAKOTA
MONTANA
VERMONT
MICHIGAN
100	200	300	400	500	600
NUMBER OF WELLS
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
NS-29

-------
WELL MONITORING BY STATE
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
ALABAMA
WEST VIRGINIA
COLORADO
TENNESSEE
LOUISIANA
10 15 20 25
NUMBER OF WELLS
30 35
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
NS-3 0

-------
WELL MONITORING BY STATE
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
mmf (¦¦¦ Vmt !¦¦¦. I * l«r II™	|m-# I I « \mJf I w I ha# Bmmm I » Vi/ I w w m*m Wb» la> V • • I 1 I 1 mmr I ¦¦¦¦ Va«F 1 1	~ Va/
ARKANSAS
ARIZONA
I
NEW HAMPSHIRE
0
_0
OKLAHOMA
0
.0
IDAHO
25

15
1 « I
» » ¦
1 i	L
20 40 60 80 100 120
NUMBER OF WELLS
140
WELLS WITH DETECTIONS >« MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
NS-31

-------
WELL MONITORING BY STATE
ALASKA
KENTUCKY
NEW MEXICO
NEVADA
UTAH
NO data available
NO DATA AVAILABLE
NO DATA AVAILABLE
NO DATA AVAILABLE
NO DATA AVAILABLE
NUMBER OF WELLS
NS-32

-------
Pesticides in Ground Water Database - 1992 Report
GRAPH 2: WELL DATA BY PESTICIDE

-------
Intentionally Blank Page

-------
PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
ALDICARB SULFONE
ALDICARB SULFOXIDE
CARBOFURAN
S.B.SR
ALDICARB
S,R,SR
ETHYLENE DIBROMIDE
c
DBCP
c
ATRAZINE
S,R
OXAMYL
S,R
ALACHLOR
S.R.SR
SIMAZINE «486
s
SI 4,583
5,070

3-7,652
37,593
28,020
2,010
002:
43,786
2,150
918!
20,221
20,545
26,909
23,305
26,856
22,374;
10,000 20,000 30,000 40,000
NUMBER OF WELLS
50,000 60,000
WELLS WITH DETECTIONS >» MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Canceled R=*Restricted S=Supported SR=Special Review U=Unsupported
NS-35

-------
^PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
123
1,2-DICHLOROPROPANE W353
c
120
BROMACIL #313
s
METRIBUZIN
S
METOLACHLOR
s
S.R.SR
122
155
CYANAZINE
S.R.SR
METHOMYL
S,R
2,4-D 11^1
S,SR
jo
LINURON
S,SR
111
17,4d8
16,142
1,666:
I
|21,399
117,372
o
§232 ^
¦ 3
9213
P 5,452


0



¦ 213



¦ 526



LP



¦ 160



122,255
17365
123^250
5,000 10,000 15,000 20,000 25,000 30,000
NUMBER OF WELLS
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C-Canceled R=Restricted S-Supported SR«Special Review U-Unsupported
NS-36

-------
PESTICIDE DETECTION

DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
DDT
c
CARBARYt
s
DiELDRIN
c
BENTAZON
s
LINDANE HI
S.R.SR
ALDICARB,TOTAL
Parent s.R.SR f 693
PICLORAM
S,R
DICAMBA fiLZi
S
dcpa mi
&/or ACID METABOLITES
P«r«otS
25,712
4,474
2,934
2,000	4,000	6,000
NUMBER OF WELLS
8,000
10,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Cance!ed R«= Restricted S=Supported SR-Special Review U=Unsupported
NS-37

-------
PESTMDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
MONURON
c H 292
FLUOMETURON l£§
11
TRIFLURAUN
S.SR
530
ALDRIN ||2_
c
11
HEPTACHLOR
C
CHLORDANE >50
C
PROMETON
s
TRIAZINE SCREENS li§_
1864
TETRACHLOROETHYLENE iM.
128
3-HYDROXYCARBOFURAN |£2
13,04#
13,241
514
12,215
590
22,314
2,000 4,000 6,000 8,000 10,000
NUMBER OF WELLS
WELLS WITH DETECTIONS >« MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Car»celad R=Restricted S»Supported SR=Special Review U=Unsupported
NS-38

-------
PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
DIAZINON
S.SR
12:;:::
¦ 42 : j ; :

ENDRIN
c
11 : : :
¦ 3Q : :

DDD
b ; : ; : :
135 : : :
¦¦¦¦¦I 2.B47

DDE
0 j ! ! 1 i
134 :	:	: : :

PROPACHLOR
s
[p ' : i i : i
133 ; ; ; :

CHLORPYRIFOS
s
h ; : j : :
05,3$
ENDOSULFAN
s
0 j • j j j
132 :	:	: : :
2,41=0

HEPTACHLOR EPOXIDE
11 : ;
132 ;	1	L : :
3,115 :

2,4,5-T
c
10 : : : : :
129 ; ; ;
3,066 ;

2,4,5-TP
c
o i j 1 i i
128 :		: : :


i i 1 i	1 I I i	1 l	L
i i .
1,000 2,000 3,000 4,000 5,000 6.000 7,000
NUMBER OF WELLS
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C*Canceled R=Restricted S-Supported SFUSpecial Review U=* Unsupported
NS-39

-------
PESTJCIDE DETEC, iONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
112
DINOSEB
c
DES-ETHYL ATRAZINE 927
BHC (a£8) |26
DES-ISOPROPYL 111.
ATRAZINE
1689
1689
TRICHLOROETHENE
c
DISULFOTON
S.R
PARATH ION .METHYL
S,R
FONOFOS
S,R
METHYLENE CHLORIDE
y
METALAXYL
s
1543
15
1292
1352
12,030
11,848
12,468
1
13,357
14,446
1,000 2,000 3,000 4,000
NUMBER OF WELLS
5,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Canceled R=Restricted S=Supported SR=SpeciaI Review U=Unsupported
NS-40

-------
PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
METHOXYCHLOR IIS
s
PROPAZINE LH
c
PENDIMETHALIN 111
s
CHLORAMBEN ILLS.
u,c
DIMETHOATE LH
S.SR
MALATHION 112
s
TRICHLORFON 111
s
2,4-DICHLOROBENZOIC |11
ACID
PARAQUAT tU
S,R
TERBUFOS LU
S.R
3,074
1,428
2,844
3,252
4,224
1,000 2,000 3,000 4,000
NUMBER OF WELLS
5,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Canceled R=Restricted S=Supported SR=Special Review U=Unsupported
NS-41

-------
PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
HEXAZINONE
s
TOXAPHENE
c
MIREX
c
CHLOROTHALONIL
s
CHLOROFORM
c
CYCLOATE
s
1684
1503
193
1271
FLUA2IF0P-BUTYL 17
s 112
6LYPH0SATE
s
DICHLOROPROPENE
S.R.SR
ENDOSULFAN SULFATE ILL
1247
14,273
1,136
21,270
11,969
1
1,000 2,000 3,000 4,000
NUMBER OF WELLS
5,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Cance!®d R-Restricted S=Supported SR=Special Review U=Unsupported
NS-42

-------
PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
TERBACIL |6
s ¦¦ 238
AZINPHOS-M ETHYL
S,R
BUTYLATE |5
s
FENVALERATE ll
S.R
MCPA
SomeS, Some C
PROPOXUR 11
S.SR
TRICLOPYR
s
ACIFLUORFEN
s
HEXACHLOROBENZENE l±
METHAMIDOPHOS
S,R
2,867
21,405
1,000 2,000 3,000 4,000
NUMBER OF WELLS
5,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=CanceIed R-Restricted S-Supported SR-Special Review U-Unsupported
NS-43

-------
PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
MOUNATE Li
s
PERMETHRIN
S.R
3-KETOCARBOFURAN
4-NITROPHENOL |l
CAPTAN
S.SR
CHLOROPICRIN
s.R
S.R.SR
S.SR
16,561
1,000 2,000 3,000 4,000
NUMBER OF WELLS
5,000
WELLS WITH DETECTIONS >« MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Canceied R=Restricted S-Supported Sfi»Special Review U=Unsupported
NS-44

-------
PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
TEBUTHIURON
AMETRYN
s
IU
CARBON DISULFIDE |2
1233
u
12
DICHLORPROP
S.SR
|0
EPTC
s
97
ISOFENPHOS y
S.R
METHYL BROMIDE
S.R
ORYZALIN
s
PROPANIL V2
S
PYRICLOR j2
c "19
1428
1388
1,146
11,207
1,^52
20,429
1
1,000 2,000 3,000 4,000
NUMBER OF WELLS
5,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Cartceled R=Restricted S-Supported SR^Special Review U=Unsupported
NS-45

-------
PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
THIOBENCARB I'
s
TRANS-NONACHLOR
& NONACHLOR
1-NAPHTHOL
c
2,4-DB
S,SB
ATRATON
c
BENOMYl 11
S.SR
ENDOSULFAN I
ENDOSULFAN II
ETU
HYDROXYALACHLOR
1,043
200 400 600 800
NUMBER OF WELLS
1,000 1,200
WELLS WITH DETECTIONS >= MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Canceled R=» Restricted S-Supported SR=Special Review U»Unsupported
NS-46

-------
PESTICIDt DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
ISOPROPALIN
c
METHIOCARB
S,R
MEXACARBATE
c
176
1166
MOLINATE SULFOXIDE LL
196
MONOCROTOPHOS
C
PHOSMET
s
PROFLURALIN L1
152
1307
86
PROMETRYN
s
PROPHAM
C
SULPROFOS
S.R
1230
21,174
1,656
! 1,060
1
1,000 2,000 3,000 4,000
NUMBER OF WELLS
5,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C-Canceled R-Restricted S»Supported SR-Special Review U=Unsupported
NS-47

-------

PESTICIDE DETECTIONS
DESCENDING BY NUMBER OF WELLS WITH DETECTIONS
DICHLOROBENZENE, O
u
3,322
0	1,000 2,000 3,000 4,000
NUMBER OF WELLS
5,000
WELLS WITH DETECTIONS >- MCL
WELLS WITH DETECTIONS
TOTAL WELLS SAMPLED
C=Cance!ed R=Restricted S=Supported SR«SpeciaI Review U-Unsupported
NS-48

-------
DETECTIONS
WT !¦¦»%? I	IF If I I I I IXIV^ mar Cm I EbV# i ¦ VbF I m
1,2,4-TRICHLOROBENZE
m?6 \

1,2-DICHLOROETHANE


2,4-DINITROPHENOL
1
o
...to.

2,6-DIETHYLANILtNE


3,5-DlCHLOROBENZOIC
mm 871

5-HYDROXY DICAMBA
Mi 87 j

ACENAPHTHENE
H^Mj228

ACEPHATE

«1,019
ACROLEIN
149

ACRYLONITRILE
¦899 i

AMiNOCARB
on 157

AMITRAZ
11 ;

AMITROLE
fll 32

ANILAZINE
il9

ATRAZINE.DEALKYLATED
M|iis

AZINPHOS-ETHYL
Is

BARBAN
B|H26Q

BENDIOCARB
1.4::::

BENEFIN


BENSULIDE



	i	1	i	1	i—I	i	I—i
i
0 200 400 600 800 1,000 1,200
NUMBER OF WELLS SAMPLED
NS-49

-------
PESTICIDES WITH NO DETECTIONS
BROMIDE
BROMOXYNIL
BUFENCARB
BUTACHLOR
CAPTAFOL
CARBAMATE SCREENS
CARBENDAZIM
CARBOFURAN PHENOL
CARBON TETRACHLORIDE
CARBOPHENOTHION
CARBOPHENOTHION.METH
CARBOXIN
CDEC
CHLORDECONE
CHLORDIMEFORM
CHLORFENAC
CHLORFENSON
CHLORO-M-CRESOL, P
CHLORO-O-CRESOL, P
CHLOROALLYL ALCOHOL
200	400	600
NUMBER OF WELLS SAMPLED
NS-50

-------
PESTICIDES WITH NO DETECTIONS
CHLOROBENZILATE
CHLORONEB
CHLOROXURON
CHLORPROPHAM
CHLORPYRIFOS-M ETHYL
CHLORSULFURON
COPPER
COUMAPHOS
CRUFOMATE
CYPERMETHRIN
CYPRAZINE
DALAPON
DEMETON
DEM ETON-METHYL
DEMETON-S
DEMETON-S SULFONE
DIALLATE
DlBUTYL PHTHALATE
DICHLOBENiL
DiCHLOROBENZENE, P
1.386
500	1,000	1,500
NUMBER OF WELLS SAMPLED
2,000
NS-51

-------
PESTICIDES WITH NO DE i ECTIONS
DICHLORVOS
DJCOFOL
DICROTOPHOS
DIOCTYL PHTHALATE
DIOXACARB
DIOXATHION
DIPHENAMID
DIQUAT
DISULFOTON SULFONE
DISULFOTON SULFOXIDE
DM PA
DNOC
ENDOTHALL
ENDR1N ALDEHYDE
EPN
ETHALFLURALIN
ETHION
ETHOPROP
ETHYLAN
ETRIDIAZOLE
1,364
— f
500	1,000	1,500
NUMBER OF WELLS SAMPLED
2,000
NS-52

-------
PESTICIDES WITH NO DETECTIONS
FENAMIPHOS
FENAMIPHOS SULFONE
FENAMIPHOS SULFOXIDE
FENARIMOL
FENBUTATIN-OXIDE
FENSULFOTHION
FENTHION
FENURON
FLUCHLORALiN
FLUMETRALIN
FLURIDONE
FORMALDEHYDE
IPRODIONE
ISOBORYL THIOCYANOAC
MALAOXON
MANCOZEB
MANEB
MCPB
MECOPROP
MERPHOS
200 400 600 800 1,000 1,200 1,400 1,600
NUMBER OF WELLS SAMPLED
NS-53

-------
PESTICIDES WITH NO DETECTIONS
METHAZOLE
METHIDATHION
METHYL ISOTHIOCYANAT
METHYL PARAOXON
METRIBUZIN DA
METRIBUZIN DADK »120
METRIBUZIN DK I-120
MEVINPHOS
NALED I247
NAPHTHALENE I-82
NAPROPAMIDE J391
NAPTALAM I-40
NEBURON p325
NITROFEN I118
NORFLURAZON l194
OCTYL BICYCLOHEPTENE
ORGANOCHLORINE SCREE i130
ORGANOPHOSPHATE SCRE I-110
OXYCHLORDANE I165
OXYDEMETON-METHYL
5,000	10,000 15,000
NUMBER OF WELLS SAMPLED
15,000 20,000
NS-54

-------
PESTICIDES WITH NO DETECTIONS
OXYDISULFOTON
OXYFLUORFEN
PEBUIATE
PHORATE
PHORATE SULFONE
PHORATE SULFOXIDE
PHORATOXON
PHORATOXON SULFONE
PHORATOXON SULFOXIDE
PHOSALONE
PHOSMET OXYGEN ANALO
PHOSPHAMIDON
PIRIMICARB SULFONE
PROFENOFOS
PROMECARB
PRONAMIDE
PRONAMIDE METABOLITE
PROPARGITE
PROTHIOPHOS
PYRETHRINS
3,341
1,000	2,000	3,000
NUMBER OF WELLS SAMPLED
4,000
NS-55

-------
PESTICIDES WITH NO DETECTIONS
RONNEL
ROTENOLONE
ROTENONE
ROTENONE,METABOLITES
SECBUMETON
SETHOXYDIM
SI DURON
SIMETONE
S1METRYN
SWEP
TERBUFOS SULFONE
TERBUTHYLA2INE
TERBUTRYN
TETRACHLORVINPHOS
TETRAD! FON
THIOBENCARB SULFOXID
THIOPHANATE
THIOPHANATE-M ETHYL
TRALOMETHRIN
TRIADIMEFON
200	400	600	800
NUMBER OF WELLS SAMPLED
1,000
NS-56

-------
PESTICIDES WITH NO DETECTIONS
TRIBUFOS
TRICHLOROACETIC ACID
TRiCHLORONAT(E)
TRICHLOROPHENOL
TRICYCLAZOLE
URACIL/UREA
VERNOLATE
XYLENE
ZIRAM
¦ t ' i	¦ i.i	
0	1,000	2,000	3,000	4,000
NUMBER OF WELLS SAMPLED
NS-57

-------
Intentionally Blank Page

-------
Pesticide's in Ground Water Database - J992 Report
TABLE 1: WELL DATA BY PESTICIDE

-------
Intentionally Blank Page

-------
NATIONAL UCLl SAMPLING DATA BY PESTICIDE





WELL RESULTS
RANGE OF
CONCEN-
TRATIONS
PESTICIDE
REGULATORY
. . STATUS
WCt or HA
C(ig/1)
Lifetime
SlAT
DATES
TOTAl
Wells
SAMPLED

1980-34
9
0
3
0.110-
0.300
TOTAL DISCRETE
UELLS




9
0
3
0.110-
0.300
:prop8f*5v::<
t
§.
' .CA .
1982-89
5473
26
56
0.1-160.0



cr _
1984
82
7
6
0.05-
290.0



:¦ ft ''
1909-91
15066
44
86
0.520-
50.200



" HI' . :
1983-87
95
0
2
0.067-
0.289



.Rfc-:;;;
1985
239
30
52
0.03-51.0




1979-81
50
10
8
1-440



MS '
1989-90
97
0
0

NS-61

-------
NATIONAL NELL SAMPLING DATA BY PESTICIDE





Uitt RESULTS
RANGE OF
CONCEN-
TRATIONS
(H3/1)
PESTICIDE :
REGULATORY
STATUS
HCL or RA
C«/D
lifetime
STATE
DATES
TOTAL
veus
SAMPLED
0 or POSITIVE
WELLS






> hct
< MCL
(1,2-DicMoro-
propane)


he /;¦
< 1989
73
0
1
0.01



kl
1983-85
17
1
0
5-10



Oft
1985-87
117
Q
9
1.4-4.0




1988-89
81
5
7
0.3-24
TOTAL DISCRETE
WELLS




21,390
123
227
0.01-440
A;.-
chlorcbenzerte -

u C
g
U
1984-87
76
0
0

TOTAL DISCRETE
WELLS




76
0
0

2,4-0 ¦'

S, SR^1"8
22
At
1987
14
0
0



AR
1986
8
0
0




CA
1979-89
1510
0
4
0,500-
46.000



T
1987-89
129
0
4
0.01-0.03



l ^
1988
2
0
0




GA
1984-91
179
0
0




HI
1980-86
11
0
0




U
1984-89
739
0
4
0.150-
0.260



!L
1985-86
466
0
0




. SN
1986-90
214
0
4
0.15-22.0



v,.-KS.::;y
1986-87
214
0
24
0.01-1.3
NS-62

-------
NATIONAL WELL SAM>UNC DATA BY PESTICIDE





WELL RfSUITS
RAMC£ OF
cstic:oe
KEGUUTOKT
STATUS
pet or HA
<«/l)
STATE
'
0AT6S
TOTAL
MELU
«WP«0
# OF POSITIVE
UELL8

-




i Ma
m,
(2,4-D)


'«A
1986-87
19
0
1
0.34



m
1986-87
62
0
0




m i
1985-90
754
0
6
0.07-4.2



*t>
1986-90
282
0
6
0.03-1.0



m '¦
1982
143
0
2
0.0079-
0.0495



HX
1964-90
84
0
5
0.11-1.7



no
1985
77
Q
0




m
1986
20
0
0




Hi
1986-88
81
0
a




BY
1985-87
139
0
2
0.5-0.56



OK
1986
22
0
0




OR
1985-87
151
0
0




PA
1987
23
0
0




Rl
1986
60
0
0




SO
1984-90
99
0
17
0.02-1.46



t*
1986-87
23
0
0




TX
1983-88
229
0
2
6.58-57.1



VA
1986-90
198
2
47
0.009-
4.74



VT
1984-87
4
0
0




WA
1988
81
0
0

NS-63

-------
NATIONAL (ELI SMPL1K DATA BT PESTICIDE





WEIL RESULTS
RANGE Of
C0NCEN-
T8ATIWS
U*/t>
PESTICIDE
*€GUUTO*r
STATUS
{la. or KA
<#9/O
STATE
DATES
TOTAL
WELLS
SAMH.E0
* OF POSITIVE
WELLS






i *Cl
< net
(2,4-0)


wv
1987-90
105
0
11
0.01-0.14 |
TOTAL DISCRETE
WELLS




6,142
2
139
0.0079-
57.1 I
Z,4-D8
S.SR**
—
CA
1988-89
67
0
0
I



#1
1986
4
0
0




III
1987-88
161
0
0




MS
1982-90
263
0
0




wr
1984-90
84
0
0




OR
1985-8?
81
0
0




TX
1987-88
187
0
1
0.22-0.23



UA
1988
81
0
0
0.22-0.23
TOTAL DISCRETE
WELLS




928
0
1
2,t-Dichloro-
b«Moie Ac5d

-------
NATIONAL WELL SAMPLING DATA ST PESTICIDE





«U ttSULTS
RANGE OF
GONCCH
THAT IONS
cwm
MET JC IDE
RESULATORY
STATUS
9& 
-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WELL RESULTS
RANGE OF
CCNCEK-
TSATlOtiS
(M/U
PESTICIDE -
*ESUUTt*y
status
aa. «• ka
<*a/D '
Lif*t i»e
STATS
SATES
TOTAL
WE LtS
SAMPLED
# Of POSITIVE
WEILS





•
£ «tt
< Ha
(2,4,5-TP)


6A
1984-91
179
0
0




M
1980-86
11
0
0




JA
1981-86
88
0
5
0.07-0.48



IL
198S-86
466
0
0




i«
1987-88
161
0
0




K5
1984-86
107
0
0




H€
1986-8?
62
0
0




Ml
1985-90
649
0
2
0.10-0.26



	HO -
1987
3?
0
0




v': MS
1982-90
263
0
0




MT
1984-90
84
0
0




HJ
1986-88
81
0
0




Wt
1985-87
139
0
0




OR
1985-87
56
0
1
0.023



rx
1983-88
42
0
0




¥A
1987-90
160
0
18
0.002-
<3.0



UA
1988
81
0
0




Uf
1987
27
0
0

TOTAL DISCRETE
WELLS




3,876
0
28
0.002-
<3.0
NS-66

-------
RATIONAL WELL SAMPLING DATA BY PESTICIDE





WELL RESULTS
RAXCE or
cmcttt-
tHATJWS
PCSTICIOE
KESUUTMtr
STATUS
or HA
<#8/1)
STATS
MYIS
TOTAL
wtus
SAHPttP
* OF posmvt
WEILS






i «a
<
.-v.::
% - -
..
CA
1986-87
228
0
0
	
TOTAL DISCRETE
UELLS




228
0
0
Ac«pft*t*
S

CA
1984-89
793
0
0




*L
1986-87
36
0
0




CMC
1986
2
0
0




TX
1987-88
188
0
0

TOTAL DISCRETE
WELLS




1,019
0
0

Aci#luorf«r»
s

M
1985-87
111
0
0




CA
1986
4
0
0




GA
1984-91
176
0
0




U
1988-89
678
0
0




u
1987
3
0
0




MS
1989-90
120
0
1
0.017



VA
1986-90
12
0
3
0.003-
0.025



WA
1988
81
0
0

TOTAL DISCRETE
WELLS




1,185
0
4
0.003-
0.025
Acrolein
S,R

A2
1986
40
0
0




CA
1986-87
10
0
0

NS-67

-------
NATIONAL UEL . SAMPLING DATA BY PESTICIDE





WEIL RESULTS
RANGE OF
CONCEK-
ttlATIOHS
U«/t)
PESTICIDE
tfcsuuaoRr
STATUS
fi£L «* «*
liffttiaw
8TATE
MTES
T01AI
WE LIS
SAMPUO
# of «»mve
WUS






i ttt
< act
(Acroltin)
"


m
1989-90
99
0
0

TOTAL DISCRETE
WELLS




149
0
•1

' AcrylartltrUe
C,R,S8c
—
MS
1989-90
99
0
0
	
TOTAL DISCRETE
WELLS




99
0
0
Al#cMof

2
IS
1985-87
111
1
0
5.8



CA
1984-89
866
0
2
0.10-1.50



cr
1987-89
136
1
1
0.1-11.0



&E
1984
9
6
3
0.1-15



fL
1909-91
15334
2
8
0.086-
89.500



OA
1984-91
76
O
0




IK
1983-89
886
6
21
0.020-
70.000



IL
1985-88
548
3
33
0.011-
18.0



IN
1985-90
210
3
2
0.23-13.9



KS
1984-87
214
2
1
0,88-2.4



-U
1987
7
0
1
0.28



w
1985-88
218
0
5
0.2-0.82 ¦



w
1983-86
45
0
17
0.1-1.0



K
1986-87
71
0
3
trace



KS
1989-90
120
0
0

NS-68

-------
NATIONAL WELL SAMH.M6 DAI* IT PESTICIDE





UECL KEfiULTS
SAME OF
CONCftt-
T8ATIWS
(**/»>
WSTtCIDE
*E«#U r«r
STATUS
MCt or «*

-------
NATIONAL NELL SAMPLING DATA BY PESTICIDE
1




UEU RESULTS
RANGE OF
CGHGEK-
T8ATIOKS
u*/u
PtSTSClBE
KESOUkTCUr
STATW
*Ct or H*
<«/0
llfAtfatt
STATE
DATES
TOTAL
WELLS
5AHPIEP
# OF POSITIVE
UEILS






2 MCL
< HCl
(Alachlor)


wi
1982-89
1327
52
26
0.1-
3000.0
TOTAL DISCRETE
WELLS




25,993
99
368
traee-
3000
ftlBchlor acreen

-•
OH
1990
863
2
74
0.100-
18.500
TOTAL DISCRETE
UELLS




863
2
74
0.100-
18.500
2,6-fclethyl-
:anit ine
(BlatMor
netabolit«)


IA
1983-
84,
1988-89
305
0
0

TOTAL DISCRETE
WELLS




305
0
0

• #ydroxy»l«cfUof
|
—
tA
1988-89 |
297
0
1
0.910
TOTAL DISCRETE
WELLS




297
0
1
0.910
Aidicerb
s,srut*
I
Al
1988
10
0
0




A*
1986-87
83
0
0




JU
1986
40
0
0




CA
1979-89
1054
18
6
0,13-
49.00



M
1984-85
10
1
1
1.0-7.0



H
1909-91
16955
66
3
0.14-
1264.00



&A
1984-91
45
16
0
10.00



id
1980
15
0
0

NS-70

-------
NATIONAL UELl SAMPLING DATA BY PESTICIDE





¦: yea results-j--
			—-
RANGE OF
.-."concert- .
TRATtONS
(M/U
PESTICIDE
REGULATORY
: / STATUS
MC
ill
. or HA
mi t >
fetfme
STATE -
'¦¦Tdates -
TOTAL
WELLS
SAMPLED
*W POSITIVE
WELLS







> MCI
< HCL
(Aldicarb)


SL
1983
25
0
0




: u
1987
1
0
0




¦ ¦ MA
1986-87
22
9
7
1.0-22.0



HE -
1980-89
445
30
140
<3 to >10



: MO
1985-90
749
1
1
0.5-30.6



as
1982-90
263
0
0




HT
1984-90
80
0
0




»c ¦
1982-91
439
2
6
1.0-28.2



NO
1985
16
0
0




NE
NH
1985-86
1986
15
1
14
1.C-3.0



14
0
0




nj :.
1983-88
| 145
6
0
3.0-50.0



NT
1980-91
i
' 20955
1723
731
|
0,08-
I 515.0



OK ;
1986
! 5
0
0




OS v
1985-87
117
1
s
10.0



Ri
1984-89
1724
51
68
1.0-63.0



SC '
1985
6
0
0

1


TX
1987-88
! 182
0
0

i


yA
1988
81
0
0

NS-71

-------
NATIONAL WELL SAMPLING DATA Bt PESTICIDE






WELL RESULTS
RANGE OF
CMCEM-
TRAT10NS




pesticide
REGULATORY-:
STATUS
HCL or-
(*9/t
: Lifetii
HA
ne -
: 'state;
DATES

i^TOTAL -
, : miS "
SAMPLED;
If Of POSITIVE
WELLS






> MCL
< MCL
(Atdicarb)


U1
1980-88
290
85
12
0.61-221
TOTAL DISCRETE
UEILS




43,786
2,010
992
0.08-
1264.OC
Aldicarb
sulfone !

,Z : '
CA
1985-89
73
1
9
0.10-4.60



PL
1909-90
15903
24
25
0.07-
61.00



m
1985-90 ;
i
100
0
0




- -
1989-90
119
0
0




. MT ^
1984-90
BO
1
5
0.15-3.8



- NJ ;;
1986-88
90
4
8
trace-4.4



Nf
1980-91
20955
4529
440
0.01-
153.00



R J
1984-85
11
7
0
3-56



TX
1986-88
213
0
0




UA
1988
81
0
0




U) '
1982
27
17
0
| 4.00-
| 10,00
i
TOTAL DISCRETE
WELLS




37,652
4,583
487
j trace-
153.00
Aldicarb ;
sulfoxide"


^ CA
1987-89
72
4
5
0.20-
13.20

1

FL
1909-91
15903
25
17
0.44-
1030.00
i
1

HH '
1985-90
100
0
0

NS-72

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE


V:j


: :yetL RESULTS ¦
RANGE OF
-:;CONC£M-;J
•^RATIONS'
C#g/13
PESTICIDE.
: REGULATORY
STATUS '
NCL or HA
CM/l) .
. Lifetime:
STATE
. DATES . ¦
.TOTAL
¦ WELLS
. SAMPLED
« Of POSITIVE .
WELLS


v;.;;-? ¦ ¦ j



' > MCL
< MCL

(Aldicarb
sulfoxide)


HS
1989-90
119
0
0




MT
1984-90
80
90
0
1
5
8
0.28-1.5



NJ
1986-88
trace-5.3



NT
1980-9!
20955
3414 j 1505
I
I
0.01-
266.00



Rl
1984-85
11
7
0
6-92



. IX
1987-88
182
0
0




UA
1988
81
0
0

TOTAL DISCRETE
WELLS




37,593
3,451
1,540
trace-
1030,00
Aldicarb, total


FL
1985-88
354
1
	
3
0.70-12.3



m
1983-4
322
62
6
o
00
o



Rl
1984
17
3
0
3-6
TOTAL DISCRETE
WELLS




693
66
9
.70-
181.00
Aldrifv
: :.c,src.:
..
AL
1987
13
0
0




CA
1975-89
1156
1
0
21.00



cr
1987-89
122
0
0




HI
1982-86
12
0
0




IA
1984-6
59
0
O




a
1983-86
491
0
7
0.01-0.11
NS-73

-------
NATIONAL WELL SAMPLING DATA B1 PESTICIDE





WELL M
SUITS


•RANGEQF '
-1':-CCWCEM- •" '
PESTICIDE. :
mmikjmr
STATUS
¦WCl,-or;M.:
(M9/D :
Lifetfroe" \
: STATE
'.DATES""
:.TOTALS
EMEUS'?;"
V'SAMPiEft ¦
#
Of PO
wetit
5ITIVE
TRAT IONS
h <»9/U






»




MCL
< MCt

(Aldrin)


in.
1985-90
191
0
3
0.060-
10.0



KS
1984-86
130
0
0




; M
1986
4
0
0


j

MS
1932-90
263
0
1
0.0052



MT
1984-86
22
a
0

i
j

HJ _
1985-88
186
0
0

|


. ;m-
1985-87
122
0
0

|


sc
1974-76
73
0
50
0.01 -
0.191



f ™ *
1987
1
0
0

j
i

TX ' - .
1983-88
199
0
0

TOTAL DISCRETE 1
WELLS
1 !




3,044
1
61
0.0052-21
Aoetryn
s :P : 6o;,:
CA
1984-89
255
0
0

1
t

C T •
1987-89
140
0
0


i
a
1988
5
0
0




hi ;
1984-85
65
e
1
0.200



IM
1987-88
161
0
0




KS '
1984
27
0
0

i


¦ «s ;
1989-90
120
0
0

j
j
1


NE
< 1989
104
0
1
0.01
|



1985-88
188
0
0

NS-74

-------
NATIONAL WELL SAMH.ING DATA 1Y PESTICIDE





UEU XfSUUS
8AKGE OF
CONOEM-
TKATIONS
£*«/!>
PESTIC'OE
REGULATORY
STATUS
82L or HA
<#a/U
STATE
DATfS
TOTAL
*US
SAHPIEO
0 of positive
«US






e Htt
« *KX '
(Ametryri)

|
-Mm
1988 |
81
0
0

TOTAL DISCRETE
UEUS

|

|
1,146
0
2
0.01-
0.200
Amfnocarb
v,c J
£A
1984-88 J
157
0
0

TOTAL DISCRETE
WEILS
1

|
157
0
0

Ami trcz
s,*,s*c j -- j
CA
1985
1
0
0



TOTAL DISCRETE
WELLS
1 1


1
0
0

hntitfot*
I S,**
•-

1984-88
32
0
0

TOTAL DISCRETE
WELLS




32
0
0

.AnUasifw
$
--
HA
1986-8?
19
0
0

TOTAL DISCRETE
WEILS




19
0
0

Arsonic

ss
a
1985-87
4
0
0




tx
1983-90
247
50
41
10.0-
680.0



UA
1988
20
0
15
1.6-13.3
TOTAL DISCRETE
WELLS




271
50
56
1.6-680.0
NS-75

-------
NATIONAL UELL SAMPLING DATA Bt PESTICIDE





UStL RESULTS -
RANGE OF
COKCEN-
TS AT I WiS
c*«m
WSTIC50E
*ESUUTO*r
STATUS

-------
NATIONAL WELL SAMtlNG DATA BY PESTICIDE





] UELL RESULTS
ftAK£ Of
CONC£K-
T8AT1QKS
Ow/»>
PCST1CS0E
*ESUUTO*y
STATUS
821 or HA
1.0



ttO
1985-67
106
0
0




BE
1975-89
2260
22
281
0.01-
107.2



KH
1986
19
0
0





1985-88
187
0
14
0.1-0.9



*T
1985-87
232
18
13
0.12-1500



OH
1988-89
599
3
111
0.001-
5.507



OK.
1986
7
0
0




Oft
1985-87
56
0
2
0.6-2.3



PA
1983-87
91
3
53
trace-
20.0



Rl
1986
24
O
5
0.06-0.11
I


SO
1984-90
99
1
1
0.25-5.40
NS-77

-------
NATIONAL UEU SAMPLING BAT A BY PESTICIDE




:
WELL WESUtTS
RANGE OF
CONCCK-
TSATiQNS
>
PfSTSCICE
' *E80UT*r
STATUS
m or KA
Lifetime
STATS
MYES
TOTAL
WEU.S
«ANPU$
* OF POSITIVE
weits






£ Ma
< Ma
(Atrazirw)



1986-87
11
0
2
0.03-0.08



rx
1986-90
279
3
7
0.21-
200.3



M
1986-90
138
4
12
0,03-
25.56



VT
1986-91
438
5
11
1.0-24.3



Vk
1988-89
81
0
1
0.4



Wt
1982-89
635
22
101
0.04-
109.00
TOTAL DISCRETE
WEILS




26,909
172
1,340
trace-
1500
itmlno,
cJealkylst»«

•*
IA
1981-89
686
0
24
0.110-
2.860



IN
1991
3
0
3
0.05-
0.370
TOTAL DISCRETE
WELLS




689
0
27
0.05-
2.860
NS-78

-------
NATIONAL UELL SAMPLING DATA BIT PESTICIDE





-:-:;yElL RESULTS
::RAMGE:-0F;:
CONCfcN- -•
TRATtONS
pesticide
REGULATOR*
/ STATUS -
NCI, or HA
Lifetime
STATE
DATES
TOT At
WELLS
SAMPLED
# Of POSITIVf
. WELLS







> Mctr:
-CHCi

Des-isopropyl
atrazine

--
IA
1988-89
686
0
23
0.100-
3.540



IN
1991
3
0
1
0.10
TOTAL DISCRETE
WELLS




689
0
24
0.100-
3.540
J Azirtphos-ethyl
C
-- •
CA
1984-85
5
0
0

TOTAL DISCRETE
WELLS




5
0
0

Azirphos-«e?hyl
S,R

CA
1984-87
905
0
0




IN
1987-88
161
0
0




CA
1984-91
76
0
0




XJ
1986
7
0
0




ME
1986-87
71
0
0




MY
1986-87
79
0
0




OK
1986
1
0
0




81
1986
99
0
0




TX
1983-88
199
0
0




VA -
1987
30
0
5
0.04-2.87
TOTAL DISCRETE
WELLS




1,628
0
5
0.04-2.87
NS-79

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WELL RESULTS-'"
. GRANGE. OF
COKCEN- '
TRATIONS '
 Htt
< MCI


Bar-ban
c -

CA
1987-89
o
o
0




MS
1989-90
120
0
0

TOTAL DISCRETE
WELLS




260
0
0

Bench'ocarb
. S,R
' "\
CA; '
1935
4
0
0

TOTAL DISCRETE
WELLS




4
0
0

Benefin
s

CA
1984-88
471
0
0

i


OK
1586
1
0
0

1


TX
1987-88
188
0
0

TOTAL DISCRETE
WEILS
1



660
0
0
1

Benomyl
S,SRC

AR
1986-87
83
0
0

i


: CA . :
1984-89
938 ; 0
i
1
500.0




1985-87
22 ] 0
0

i TOTAL DISCRETE
i WELLS
l




1,043 0
1
500.0
Bensulide.
s


1985
3
0
0




TX . ¦
1987-88
188
0
0

TOTAL DISCRETE
WELLS




191
0
0

Bentazon
S

CA
1981-89
200
1
63
0.10-20.0



LA
1987
3
0
0

NS-80

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WElt RESULTS
RANGE Of :
CONCEN-
TRATIONS
(M/U ;
PESTICIDE
REGULATOR*"
STATUS
MCI or HA

Lifetime
STATE
DATE
TOTAL
UEtLS
SAMPLED
WELLS




year" •

i KCL
< MCL
(Bentazon)


HO
1986-90
266
0
5
0.6-1.0
•


HS
1989-90
120
0
0

j
1

OR
1985-87
44
0
0




VA
1986-90
12
1
10
0.186-41.89



WA
1988
81
0
0

TOTAL DISCRETE
UELLS
i
J



726
2
78
0.10-41.89
1
BHC (a, B,(S)
C,SRC

AL
1987
13
0
0

|


CA
1984-89
1154
0
0




K!
1986
5
0
0




IA
1983-86
' 59
i
0
0




II
1983
I
: 25
0
20
trace-0.16



IN
1986 :
8
0
0




KS
1982-90
263
0
6*s
0.0014-
0.0049



MJ
1987
10
0
0




MY
1985-87
122
0
c




TH
1987
1
0
0




rx
1
1987-88
j 188
0
					i
0

TOTAL DISCRETE
WELLS I



1,848 , 0
J
26
trace-0.16
NS-81

-------
NATIONAL WEIL SAMPLING DATA BT PESTICIDE





WELL RESULTS
SAMGE OF
COtiCfH-
TaAHONS

Lffetime
STATE
DATE
- TOTAL
WELLS
mis'




TEAR

i MCI
< net
SromaclE
S
'90
i
CA
1984-90
1395
0
46
0.030-
20,000



Pi.
1909-91
15484
20
238
1-951.6



LA
1987
1
0
0




HS
1989-90
120
0
0




wc
1986
1
0
0




OR
1985-87
56
0
2
5.0-7.4



TX
1983-88
230
0
6
0.10-2.0



VT
1984-86
4
0
0




WA
1983-89
81
0
1
11-14.9
TOTAL DISCRETE
WELLS




17,372
20
293
0.03-951.6
0romi.de

• r:;
CA
1984
6
0
0

TOTAl DISCRETE
WELLS




6
0
0

Bronioxynll
is' / "

::QR-
1985-87
107
0
0

TOTAL DISCRETE
WELLS




107
0
0

Sufencarb


CA
1984
4
0
0

TOTAL DISCRETE
WELLS




4
0
0

NS-82

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE






WELL RESULTS
RANGE Of
CONCEN-
TRATIONS
PESTICIDE
REGULATOR*
STATUS ¦
MCL or HA
{ftB/U
Li fetime
STATE

DATE
" TOTAL
WELLS
SAMPLED
WELLS




YEAR

i NCL
< HCl
Butachlor
C
" 1
¦ CA
1989
6
0
0

TOTAL DISCRETE
WELLS




6
0
0

gut/late
s
350
" CA
1984-89
13
0
0




'' GA
1984-91
76
0
1
1.500



1A
1985-39
762
0
0




IL
1985-87
51
0
1
0.97-2.23



IN
1988
97
0
0




LA
1987
1
0
0




m
1986-87
71
0
0




m
1985-90
754
0
0




m
1987-90
293
0
1
0.87


i
HS
1989-90
120
0
0




HE .
< 1989
71
0
0




NT
1985-87
146
0
0




Oft
1985-87
56
0
0




RJ
1986
157
0
2
1.1-1.2



SD
1984-90
99
0
0




! VA
1990
IOC
0
0

TOTAL DISCRETE
WELLS


i

2,867
0
5
0.87-2.23
NS-83

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





¦' WELL RESULTS '
: RANGE OF
CONCEN- •
TRATIONS
(M/U
PESTlCtQE :
REGULATORY
STATUS
^MCL or: HA
lifetime.,
STATE
0ATE
:total
UELLS.
SAW LEO
' - " WELLS'




¦: ¦ yEAR; ¦:

£ MCI
< HCL

Captafot
C

CA
1987
£
0
0





1986-87
71
0
0




TX
1987-88
188
0
0

TOTAL DISCRETE
WELLS




265
0
0

Captari.
s,ssc .
-•
- CA
1984-89
1158
0
3
0.100-0.500



It
1983
25
0
0




IN ,
1987-88
161
0
0




MI:' '
1986-87
71
0
0




OR
1985-87
26
0
0




: RJ
1986
99
0
0




TX
1987-88
188
0
0




VA
1990
100
0
0

TOTAL DISCRETE
WEILS




1,828
0
3
0.100-0.SCO
Carbamate
; Screen.--	



1985-88
80
0
0
:




1986
25
0
0
I
TOTAL DISCRETE
WELLS




105
0
0
j

s
700

1984-89
1433
0
Z
2.000-2.300
¦ Carbaryi-
CA





..- CT
1987-89
68
0
0
i




1988
3
0
0

NS-84

-------
NATIONAL WELL SAM>L1NG DATA BY PESTICIDE





WELL RESULTS
RANGE OF
COMCEK-
TSATiQNS
0*/l>
PESTiCIDt
R3EGULATOIH
STATUS
KB, or *A
STATE
CATC
TOTAL
t£U9
SAMPLED
f Of POSITIVE
WELLS




W*

5 Mtt
< MCt
(Carbaryl)


•
1984*91
71
0
0




IK
1986
8
0
0




HE
1956-87
71
0
0




"MM
1985-90
749
0
0




MO
1986-90
325
0
11
0.2-1.7



US
1989-90
119
0
0




HT
1986-88
64
0
0




W
198?
491
0
0




(U
1986-88
121
0
0




•fY
1980-91
21027
0
69
0.11-610.00



OR ;
1985-87
12
0
0




If
1984-86
830
0
13
0.11-4.0



TX
1987-88
182
0
0




¥A
1986-90
138
0
11
0.03-1.22
TOTAL DISCRETE
WELLS




25,712
0
106
0.03-610.00
c&rtendatlm
C
" l
CA
1984-88
208
0
0

TOTAL DISCRETE
WELLS




208
0
0

Csrbofurfto
S,*,SftC
AO
AL
1988
10
0
0




CA
1980-89
1312
0
1
0.500



.. S£
1984-86
12
1
0
3
NS-85

-------
NATIONAL UEll SAMPLING DATA «V PESTICIDE





UELl RESULTS
RANGE OF
COKEH-
TKATIWS
ttS/U
PtSTlCIDE
KfiULATORY
STATUS
JSfc w
«W/t>
lifetime
STATE
OATt
TOTAl
WELLS
SAWLED
# OF POSITIVE
VEILS




tm

i HCl
< MCI
| 
-------
NATIONAL WELL SAMtlM DATA IT PESTICIDE





WELL RESULTS
RANGE Of
COHCEtf-
T#AT»OHS
(**/n
PESTICIDE
REGULATORY
$T*T«$
isa or ha
(M/l)
STATE
OATf
TOTAL,
WELLS
SAMPLED
# Of POSITIVE
UEUS




n*»

* tttl
« #Ci
{Corbofuran)


T*
1987-88
183
0
0




VA
1986-90
138
0
16
0.019-3.67



UA "
1988-89
81
0
1
2.4



m
1982
26
0
5
2.00-12.00
TOTAL DISCRETE
WELLS




27,881
73
4,034
trace-
176.00
3-Hydroxy
Carbofuran

«...
CA
1989
6
0
0




IA
1981-89
714
0
6
0.050-16.60



MN
1985-90
too
0
0




MS
1989-90
119
0
0




wr
1986-88
64
0
0




*4
1987-88
90
0
1
trace



.«*
1980-91
21028
0
37
1.00-10.00



Rl
1984-85
11
0
1
1



tx
1987-88
182
0
0
trace-10.00
TOTAL DISCRETE
WELLS




22,314
0
42
3-Keto
V! carbofuran

-•
CA
1989
6
0
0




1A
1983-89
713
0
3
0.027-0.030
NS-87

-------
NATIONAL HELL SAMPLING DATA IT PESTICIDE





UEU RESULTS
RANGE Of |
COHCEK- J
PESTICIDE
REGULATORY
STATU?
|£i or HA
Ltfttls*
St ATE
OATE
TOTAL
UEUS
SAWLFO
# Of POSITIVE
WEU$
TSATIQMS I
<*«/»> J




n**

* na
< *u

(3-Keto
carbofurari)


MS
1989-90
120
0
0

TOTAL DISCRETE
WEILS




839
0
3
0.027-0.030
C#rtoofur»n
F+i«nc>ti

—
CA
1989
6
0
0




MS
1989-90
120
0
0

TOTAL DISCRETE
WELLS




126
0
0

Carbofuraft.
Total

-*
MA
1983
138
0
20
1.0-36.6



PL
1988
1
0
0

TOTAL DISCRETE
HELLS




139
0
20
1.0-36.6
Cartoon
Disulfide
U
--
CA
1988
2
0
2
0.600-2.000



<*
1985-87
10
0
0

TOTAL DISCRETE
WELLS




12
0
2
0.600-2.000
Carbon
Tetrachloride
SR*
£*2
MS
1989-90
99
0
0




JA
1984
2
0
0

TOTAL DISCRETE
WELLS




101
0
0

Carbophenoth i an
t
-
CA
1984-88
172
0
0




CT
1987-89
101
0
0

NS-88

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WELL RESULTS
RANGE OF
CQNCEN- ..
TRATLONS

-------
NATIONAL WELL SAMPLING DATA BT PESTICIDE





. wet i.ReaMJti
¦:GRANGE";0F v
• ' COKCEK-' ¦"
¦ TRAT IONS--:-..
.'wij-'-:
PESTICIDE1 :
REGULATORY
HCL .or HA

t'ifecSme '•
. STATE
:DATE '
: TOTAL
WELLS
SAMPLED:










YEAR...:.
HCi .
«¦ KCl
CEEC
.c'/vr

CA
1987
&
0
0

TOTAL DISCRETE
WELLS




6
0
0

Chlcramberi .
u,c .
"v'W..
:CA.
1986-88
18
0
0




6A
1984-91
170
0
12
1.00



iA
1984-89
759
0
0




¦MM. ¦
1985-90
749
0
0




HC
198?
19
0
0




SO -
1984-90
99
0
0




•MA.
1988
81
0
0

TOTAL DISCRETE
WELLS




1,895
0
12
1.00
Chlordaoe
C,$RC
2
AL
1987
13
0
0




¦ CA
1975-89
1268
1
0
20.000



CT
HI ...
1987-89
1982-86
1??
0
3
0.1-0.3



7
0
0




IA
1985-86
26
0
0




ft
1983-88
494
0
27
0.01-0.06



- IN
1986-88
169
0
0




KS
1934
1986-87
214
3
1
0.47-7.9



MA
1986-87
i
19
2
9
0.12-7.2
NS-90

-------
NATIONAL WELL SAMPLING DATA BT PtSTlClDfc





. UEtt RESULTS
: RANGE OF
rv.'COKCEM*,:
TRAHOJiS
 KCl
< MCI
(Chlordane)


; ¦ w
1986-90
269
0
3
0.02-0.09



HS
1989-90
240
0
0





1984-86
22
0
0




- «H .
1986
17
0
0




NJ
1985-88
186
0
0




NY
1985-87
122
0
0




TH
1987
1
0
0




TX
1983-88
199
0
0




VA.
1989-90
126
1
0
6.386
TOTAL DISCRETE
WELLS




3,514
7
43
0.01-20.000
Nonachlor
(chI ordone
impurity)

. ...
MT
1984-86
22
0
0

TOTAL DISCRETE
WELLS




22
0
0

Oxychlordane
(chlordane
degredate)

i
. HS
1982
143
0
0



i
1
i
i
- «T -
1984-86
22
i
i
0
0

TO'AL DISCRETE
WELLS




| 165
0
0

NS-91

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





" WELL RESUtTS
RANGE Of "
COXGEN- :
PEST JCIDE
REGULATORY
STATUS
MCI or HA
Lifetime
STATE.
DATE
TOTAL
.WELLS
SAMPLED
V. WELLS: :
TKATIONS -.
.cm/i) ;




TEAR

i KCl
< KCL

Trsne-nonachicr
(chlordane
itnpuri ty)

.¦ "* ¦
KS
1982
143
0
2
0.0016-
0.0018
TOTAL DISCRETE
WELLS
i
1
1



143
0
2
0.0016-
0.0018
Chlordecone
c4src
--
CA
1984-85
2
0
0

i
TOTAL DISCRETE
WELLS

i


2
0
0

Chtordimcforra
„ . j
C,SRC J
CA
1985-87
287
0
0

TOTAL DISCRETE
WELLS
I
|
1
1

!

287
0
0

Chlorfcnac
I u.c

CA
1985
4
0
0

TOTAL DISCRETE
j WEILS
I




4
0
0

j Chiorfer.son
	
u.c
--
CA
1984
2
0
0

! TOTAL DISCRETE
j WELLS j
1 i




2
0
0

Chloro-.T.-
cfesoi, p-
s

HI
1984-85
40
0
0

' TOTAL DISCRETE
, VCLLS




40
0
0

Chloro-a-
1 cresol, p-
1

--
CA
1984
1
0
0

! TOTAL DISCRETE
: WEILS
.




1
0
0

NS-92

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WEU results -
RANGE Of .
- CONCEN-
¦ - THAI IONS
(M/O
PESTICIDE
REGULATORY
STATUS ;
HCL or HA
(pg/l)
Lifetime
STATE
DATE
TOTAL
WELLS
SAMPLES
WELLS




. • TEAR

2 MCI
< net
ChloroaUyi
Alcohol
C
"
CA
1981-87
12
0
0

TOTAL DISCRETE
WEILS




12
0
0

Chiorcbenz ilate
C,SRC

CA
1984-85
8
0
0

TOTAL DISCRETE
WELLS




8
0
0

Chloroform
SRP
100
HI
1983-87
96
0
4
0.500-4.000



MS
1989-90
97
0
3
1.0-8.0
TOTAL DISCRETE
WELLS




193
0
7
0.500-8.0
Chloroneb
S
"
CA
1984-89
14
0
0

TOTAL DISCRETE
WELLS




14
0
0

Chloropicrin
S,R

CA '
1984-89
1386
0
0




f I
1909-91
15175
3
0
0.035-0.068
TOTAL DISCRETE
WELLS




16,561
3
0
0.035-0.068
ChlorothaloniI
S
• •
CA .
1984-89
614
1
0
0.800-1.1C0



Ft
1988
25
1
0
0.140



HA
1986-87
19
0
2
0.22-0.38



H£
1986-87
71
0
4
trace



m
1989-90
120
0
0

NS-93

-------
NAI1UNAI WELL SAMPLING DATA BY PESTICIDE
PESTICIDE




WELL RESULTS
MCE; Of ,¦ :¦¦¦
CONC£N-
;tratio«s -:
i;
REGULATORY'
, STATUS.:; :
MCL or HA .
 -•
lifetime...
"STATE
T' MJ£ :
TOTAL
WELLS
SAMF1EO
1.CLLS






> MCL
< MCL
(Chloro-
thalom U


rx [
1986
1
0
0




08
1985-8?
38
0
0




R1
1986
60
0
0


1 i
• TX '
1987-88
188
0
0

TOTAL DISCRETE
WELLS
i


1,136
2
6
trace-1.100
Chloroxursn
1 c
"
1
[ CA
1988-89
21
0
0

TOTAL DISCRETE
UELLS




21
0
0

Ch1 orpropham
s J
CA
1984-89
| 561
0
0

TOTAL DISCRETE
WELLS
1


J 561
0
0

Ch.lorpyrifos
s
. 20
CA
1984-88
1026
0
1
0.060



?L'r
1585-87
92
0
0




»r
1986
8
0
0




tA
1984-89
783
0
0




IL
1983-87
76
0
19
trace-0.09



IN
1986-90
207
0
2
0.17-0.50
i
1


HA
1986-87
19
0
2
0.05-0.1



- ME
1986-87
71
0
0



1
'MS' '
1989-90
120
0
0




MN '
1985-90
754
0
0

NS-94

-------
NATIONAL UELL SAMPLIIK DATA BY PESTICIDE





WELL RESULTS
SANGE OF
CONCfN-
TRATJOKS
(MF/t)
PESTICIDE
REGULATORY
STATUS
HEk or HA
Iffcttiw
STATE
©ATE
TOTAL.
WELLS
SAMPLED
1 OF POSITIVE
VEILS




¦: VLMt

* NCI
< HC
(Chlorpyrlfos)


HO
1986-90
325
0
1
0.2



*8
< 1989
1435
0
0




*#
1986
18
0
0




«Y
1986-87
79
0
0




OK
1986
2
0
0




08
1985-87
14
0
0




Pk
1985-87
24
0
0




TX
1986-88
219
0
0




¥A
1989-90
126
0
7
0.654
TOTAL DISCRETE
WEILS




5,398
0
32
trace-0.654
Kertiyl
Chlorpyrifos
S

G*
1984-91
76
0
0




IK
1987-88
161
0
0

TOTAL DISCRETE
WELLS




237
0
0

Oilcrsulfuron
S
—
CA
1987
2
0
0





1988
6
0
0

TOTAL DISCRETE
WELLS




8
0
0

Copper ||| j
CA
1987-88
6
0
0

TOTAL DISCRETE |
WELLS H|


6
0
0

NS-95

-------
NATIONAL WELL SWUNG DATA BY PESTICIDE





WELL RESULTS
RANGE OF
C0NCEK-
T8AT10NS
(M/t>
PESTICIDE
REGULATORY
STATUS
WCi or HA
<»/l>
I5
-------
NATIONAL IELL SAMPL1IW DATA IT PESTICIDE





UEIL RESULTS
SAME Of
CONCEK-
TSATJWS
<*s/o
PESTICIDE
REGULATORY
STATUS
*Cl or HA

-------
RATIONAL WELL SAMPLE i DATA BY PESTICIOC
|




1*Li RESULTS
4AN6E Of
COMCEN-
TRA TiO#S
pcsrtcioe
REGULATORY
STATUS
HCt Of MA
c#«m
STATt
BATE
TOTAL
WELLS
SAW LSD
# Of POSITIVE
UEU.S




YEA*

t hcl
< WCl
Cycicatft
S
--
CA
1984-89
13
0
0




MS
1989-90
120
0
0




NT
1987-88
13
0
0




OK
1985-87
44
0
0




UA
1988
81
0
7
0.2-1.08
TOTAL DISCRETE
WEILS




271
0
7
0.2-1.08
Cypermethrtn
M
--
All
1986-8?
83
0
0




MO
1986
40
0
0




I*
1987-88
188
0
0

TOTAL DISCRETE
WELLS




311
0
0

CyprazSr*
c
-
CA
1985
14
0
0




xs
1984
27
0
0




no
1983
30
0
0

TOTAL DISCRETE
UELLS




71
0
0

&al»pon

goo
CA
1985-89
21
0
0




tt
1988
4
0
0




IK
1987-88
161
0
0




MS
1989-90
120
0
0

NS-98

-------
MA. ONAL'UEU. SAMPLING DATA BT PESTICIDE





WELL RESULTS
fiAMCE or
CONCCH-
THAT IOW6
KSTICJM
SSSULAT4KT
ttATUS
«l or HA
Liftrtim
STATE
MTE
TOTAL
.-mis
jumeo
# OF POSITIVE
WU.«




im


< Wtt
(Da lepon)


WA
1988
81
0
0

TOTAL DISCRETE
WELLS




387
0
0

MO>
(OibfwaocMcro-
propma)
C,*,»C
sui
AZ
1986
40
0
1
0.0085-
0.019



CA
1978-89
4635
1053
517
0.001-
8000.00



FL
1909-91
15013
43
76
0.020-
39.470



«
1979-87
423
14
51
0.001-5.744



IN
1987-89
175
0
4
0.04-0.11



M
1979-81
50
6
0
2-76



SC
1979-80
115
11
50
0.008-83.87



VA
1979
13
2
0
76-114



' UA
1988-89
81
1
0
0.3-0.36
TOTAL DISCRETE
WELLS




20,545
1,130
699
0.001-
8000.00
DCM <0Bcthsn
s
4000
CA
1984-89
663
0
1
0.70-300.0



6A
1984-91
76
0
1
99.000



1A
1988-89
686
0
3
0.010-0.030



!R
1987-88
161
0
0




K
1986
103
0
0




IA
1987
1
0
0




MA
1986-87
19
0
0

NS-99

-------
NATIONAL UELL SAMPLING DATA IT PESTICIDE





WELL RESULTS
AANCE Of I
CONCEIT- I
PESTICIDE
REGULATORY
STATUS
JSi or KA
Mfetia*
STATE
OATC
TOTAL
WELtS
SAMPLED
# OF POSITIVE
WELLS
TftATIQtfS
{**/!>




rfM

i *Cl
< #Cl

COCPA)


US
1989-90
120
0
0




#H
1986
18
0
0




RI
1986
60
0
0




VA
1989-90
126
0
0

TOTAL DISCRETE
WEllS




2,033
0
5
0.010-300.0
OCPA #cid
aetaboi i res

--
CA
1989
6
0
2
0,223-0.308



MA
1986-87
19
0
3
0.21-1.07



00
1985-87
93
0
54
1.0-431.0
TOTAL DISCRITE
WEILS




118
0
59
0.21-431.0
DCPA 


VA
1988-89
81
0
7
0.2-1.08
TOTAL DISCRETE
WELLS




81
0
7
0.2-1.08
DDT
C

Al
1987
13
0
0




CA
1975-89
1105
0
3
0.020-0.120



ti-
1987-89
122
0
0




nt
1982-86
11
0
0




{A
1983-86
59
0
0




It
1983-86
491
0
18
0.01-0.07
NS-lOO

-------
NATIONAL WELL SAMPLING DATA IT P, .TICIDE





WELL RESULTS
AAttCE Of
CONCEN-
TRATiOKS
PtETJClDE
KSGULATQRT
STATUS
wet or HA
<#!)/*>
STAT€
SATE
TOTAL
WELLS
SAJWUD
» OF POSITIVE
WELLS




wjl

i MCI
< Ma
(DDT)


IN
1985-90
193
0
4
0.18-0.30



»
1984*86
130
0
0




NO
1986
4
0
0




MS
1982-90
263
0
4
0.006-0.402



HI
1984-86
22
0
0




«J
1985-88
187
0
6
0.001-0.020



MT
1985-87
122
0
0




SC
1974-76
73
0
73
0.006-3.3



TK
1987
1
0
0




TX
1983-88
219
0
0




VA
1990
100
0
0

TOTAL DISCRETE
WELLS




3,115
0
108
0.001-3.3
ODD
»C
—
Al
1987
13
0
0




CA
1979-89
1026
0
1
1.040



CT
1987-89
122
0
0




01
1982-86
10
0
0




1A
1983-86
59
0
0




JL
1985-86
466
0
0




irt
1986-88
169
0
0





1984
27
0
0

NS-101

-------
RATIONAL UELL SMCH.IHfi DATA KT PESTICIDE





UEU RESULTS
«ANC£ OF
CONGER-
TRATiOKG
<«/! >
PtSTICiDE
REGULATORY
status
MCL ar HA
>
Ufotta*
STAT€
DATE
TOTAL
HELLS
SAMPLED
# OF POSITIVE
vats
.



*CA*

t *CL
« *CL
(ODD)


*>
1986
4
0
0




MS
1982-90
263
0
3
0,0033-0.11



XT
1984-86
22
0
0




XJ
1985-88
186
0
1
0.07



RY
1985-87
122
0
0




$C
1974-76
46
0
30
0.01-0.779



TH
1987
1
0
0




U
1983-88
11
0
0




VA
1990
100
0
0
0.0033-
1.040
TOTAL DISCRETE
WELLS




2,647
0
35
DOE


AL
1987
13
0
0




CA
1979-89
1086
0
3
0.010-0.090



CT
1987-89
122
0
2
0.001



M
1982-86
12
0
0




IA
1983-86
59
0
0




H
1985-86
466
0
0




!*
1985-90
190
0
3
0.19-0.28



ICS
1984
27
0
0




MO
1986
4
0
0




MS
1982-90
263
0
4
0.002-0.54
NS—102

-------
NATIONAL UELL SAMPLING DATA BY PESTICIDE





WELL RESULTS
RANGE OF
CONCEN-
TRATIONS
(*9/t >
PEST tClOE
REGULATORY
STATUS
~gk Of HA
(m/o
Ufeti*#
STATE
MTE
TOTAL
VELLS
SAW L£B
# OF POSITIVE
WELLS




>UI

i MCL
* Ma
(DDE)


KT
1984-86
22
0
0




UJ
1985-88
186
0
6
0.001



MY
1985-87
122
0
0




SC
1974-76
46
0
16
0.01-0.3



T#
1987
1
0
0




T*
1983-88
199
0
0




: VA
1990
100
0
0

TOTAL DISCRETE
UELLS




2,918
0
34
0.001-0.54
psmton
C
> ¦¦¦ *+. .. -
CA
1984-89
1149
0
0




GA
1984-91
76
0
0




IK
1987-88
161
0
0
			
TOTAL DISCRETE
UELLS




1,386
0
0
Deweton-swthyt
C
¦ -m \.
OR
1985-B7
10
0
0




TX
1987-88
188
0
0

TOTAL DISCRETE
WELLS




198
0
0

Btafton-S
1 -

1986
8
0
0 I
|
TOTAL DISCRETE
UELLS
|


8
0
o |
I
NS-103

-------
NATIONAL UELL SAMPLING OATA IV PESTICIDE





UELL 8E6tfi.TS
MMGE OF
COWCEM-
TKATJONS
UHf/U
KSTICIOE
REGULATORX
STATUS
KCL Of HA
STATE
OAT£
TOTAL
WELW
SAHPUB
# OF POSITIVE
WELLS




yf«t

t UCL
« #u
Oefaeton-S
sulfone

-
TX
1987-88
186
D
0

TOTAL DISCRETE
WELLS




188
0
0


C.S.SR*

hh •;
1985-90
649
0
0

TOTAL DISCRETE
WELLS




649
0
0

Dfaiinon
j,ac
0.6
CA
1984-89
863
2
1
0.100-3.200



CT
1987-89
117
0
1
0.07



Fl
1986-88
37
0
0




6A
1984-91
76
0
0




»[
1982-86
12
0
0




JA
1987-89
717
0
0




!L
1983-B6
491
0
7
trace-0.08



IM
1987-88
164
0
1
0.32



KS
1984
27
0
0




MA
1986-87
19
0
0




HE
1986-87
71
0
0




HO
1986-90
325
0
7
0.2-1.0




1982-90
263
0
6
0.012-0.478



#E
< 1989
54
0
0




HH
1986
20
0
0

NS-104

-------
NATIONAL WELL SAMPLING DATA BT PESTICIDE

i



	*_
U5U- RESULTS
«am«e or
ttMcat-
nwmoHs
u«/o
P€SUCID£
I REGULATORY
STATUS
j$y, of ma
UfftlM
STATf
OATf
TOTAL
WE US
SAW ISP
# OF POSITIVE
WELLS




YEA*

s m.

(Oiazinon)



1985-88
184
0
2
0.01-0.09




1986-87
79
0
0




t*
1986
2
0
0




on
1985-8?
56
0
0




Bt
1986
133
0
0




TX
1983-88
42
0
0




VA
1989-90
126
0
15
0.029-0.262



WY
198?
6
0
0

TOTAL DISCRETE
WELLS




3,884
2
40
trace-3.2
Dibutyl
Pfcthaiat*
«,C
•-
TX
1983-86
11
0
0

TOTAL DISCRETE
WELLS




11
0
0

fci carta*
s
200
CA
1986-89
180
0
0
I



cr
1987-89
55
0
1
0.01



0£
1985-86
12
0
12
0.1-23.5



fl
1988
3
0
0




IA
1984-89
754
0
0




I*
1986-90
203
0
9
0.60-44.0



LA
1987
1
0
0




HA
1986-87
19
0
1
0.06
NS-105

-------
NATIONAL UELL SWPtIH6 DATA IT PESTICIDE





UELt RESULTS.
fi*IK£ OF
C0NCCK-
TXATIOHS
CM/1>
ptsTicrcc
«<5UUtC*T
STAftW
Wa or HA
<«/»>
STATE
MTC
TOTAL
WELLS
SMPLSD
# Of POSITIVE "
HtU.5




rEAt

t «CI>

(Dicanba)


-
1986-87
62
0
2
tr>ee



w
1985-90
749
0
6
0.05-2.1



90
1987
19
0
0




MS
1989-90
120
0
1
0.032



KT
1984-90
84
0
6
0.26-3.0



Me
< 1989
36
0
0




m
1986
17
0
0




OK
1986
4
0
0




OA
1985-87
70
0
0




PA
1987
23
0
0




*1
1986
60
0
2
0.2S-1.41



SO
1984-90
99
0
2
0.042-0.11



n
1986-90
278
0
3
0.06-0.94



VA
1986-90
138
0
11
0.006-4.68



WA
1988
81
0
0




WV
1987-90
105
0
16
0.01-0.25
TOTAL DISCRETE
WELLS




3,172
0
72
trftce-44.0
NS-106

-------
NATIONAL WELL SAWLMG DATA BY PESTICIDE





VEU. RESULTS
fiAHGE OF
COHCEN-
T8AT10KS
PCSTICIQE
REGULATOR*
STATUS
HCL or HA
<«/*>
Lifetime
STATE
DATE
TOTAL
WELLS
SAHPiSO
# Of POSITIVE
WEUS




*fA*

» XCL,
«*tt
5-HydroKy
Oicanfca

-
U
1989
6
0
0




WA
19&B
81
Q
0

TOTAL DISCRETE
WELLS




87
0
0

®1c*dab«nH
S
"

198?
1
0
0

TOTAL DISCRETE
WELLS



I
'
0
0

Dichioro-
bentene. o-
I U
m
CA
1986-89
3120
0
1
0.560-0,610
TOTAL DISCRETE
WELLS




3,120
0
1
0.560-0.610
DfeMof-o-
¦ benzftfte, e-

feoo
CA
1984-89
202
0
0
	
TOTAL DISCRETE
WELLS




202
0
0
DfcKloro-
benzene, p-
S
—
i«
1988
97
0
0

TOTAL DISCRETE
WELLS J




97
0
0

Ofehloroproprr*
<1,3-05
M.***
--
CA
1979-89
5364
0
3
0.890-
31.000



n
1909-91
15281
0
2
0.279-7.830



HI
1979-87
5A
0
0




HA
1985
239
0
0

NS-107

-------
NATIONAL WELL SMPtlNC M» BY PESTICIDE





WELL RESULTS
RANGE or
CQKCEV-
TftATIONS
u*/o
PESTJCIOE
REGULATORT
STATUS
J£L Of HA
(M/t>
STATE
MTE
TOTAL
WELLS
SAMPLED
» Of WSSlTfVE
WELLS




m*

s net
< *ct
(Dichloro-
propene)


«S
1989-90
198
0
0




W
1983-85
1?
0
1
18-140



00
1985-87
117
0


TOTAL DISCRETE
WELLS




21,270
0
6
0.279-140
CMchtorpfop
S.S***
--
AR
1986
8
0
0




CA.
1988-89
67
0
0




CT
1987-89
125
0
1
0.09



*1
1982-87
96
0
1
0.400




1987-88
161
0
0




KS
1984
27
0
0




KS
1982-90
263
0
0




HT
1984-90
84
0
0




NJ
1986-88
81
0
0




TX
1987-88
187
0
0




UA
1988
81
0
0




WY
1987
27
0
0

TOTAL DISCRETE
WELLS




1,207
0
2
0.09-0.400
Oichlwvos
Sr$&*

CA
1984-89
20
0
0




M
1986
7
0
0

NS-108

-------
RATIONAL WELL SAMPLING DATA IT PESTICIDE





1CU SCSULTf
I RA#fiE or
CCKC£«»
TRATIOKS
£*«/i>
PE8TIC1DI
REGULATORY
STATUS
Li
STATt
OATE
TOTAL
WELLS
SAMPLED
t OF POSITIVE
WELLS




run

6
s #a
(Dlchlorvos) j


J*
1987-88
161
0
0

TOTAL DISCRETE
WELLS




188
0
0

Dteofol
$,Stc
..
CA
1979-89
1Z6Z
0
0




'SA
1984-91
179
0
0




HI
1986
5
0
0




TK
1987-88
188
0
0

TOTAL DISCRETE
WELLS




1,634
0
0

Dicrotophos
M


1984-87
14
0
0

TOTAL DISCRETE
WELLS




14
0
0

Oieldrsn
C,S*C
--
::-AL,r,::
1987
14
0
2
0.01-0.1



CA
1975-89
1150
3
0
0.050-2.600



CT
1987-89
122
0
7
0.001-0.13



m
1982-86
16
0
0




SA
1983-86
67
0
0




a
1985-87
517
0
28
0.003-0.10



III
1986-90
190
0
1
0.22



xs
1984
1986-87
214
0
2
0.26



HQ
1986
4
0
0




' HS
1982-90
263
0
1
0.002
NS-109

-------
MAT ZONAL UELL SAMPUfc. wATA UY PESTICIDE





WELL 8EHX.IS
8ANSE OF
CWCEK- :: :::
rSATIOMS ,
u«/t>
RESnClfiC
8EGULAT0SY
STATUS
hcl or XA
WD ,
Li#**<«»
STATE
DATE
TOTAL
WELtS
Sampled
# OF POSITIVE
was




«A*

i *Ct
« «a
CDieldrin)


XT
1984*86
22
0
0




*e
< 1989
35
0
2
0 - 0.5




1985-88
186
0
18
0.001-0,043



xr
198S-87
122
0
0




sc
1974-76
46
0
22
0.01-0.771



TX
1983-88
188
0
0

TOTAL DISCRETE
WELLS




3,156
3
83
0 - 2.600
Ehsethoat*
s,s*c
-
«
1984-89
1118
0
2
0.380-
10.000



M
1984-91
76
0
10
1.000



u
1987-89
704
0
0




m
1985-90
649
0
0




w
1986
68
0
0




OK
1986
1
0
0




PR
1985-87
14
0
0




tx
1987-88
188
0
0




VA
1989
26
0
0

TOTAL DISCRETE
WELLS




2,844
0
12
0.380-
10.000
JHno»«b
C,SRC
I
a -
1984-89
1214
1
0
30.000



HI
1986
4
0
0

NS-110

-------
NftTIuML WELL SAMPLING DATA ST PESTICIDE
-



VI
WELL RESULTS
R**se of
CWCEK-
pcsticjde:
REGULATOR?
STATUS
$£1 Of MA
£«/*>
STATE
..
DATE
TOTAL
MELIS
SAW LED
# OF POSITIVE
VKU.S
ISATHMS
Cm/1>




*IA*

it HCI.
«Ma

(Dinoseb)


t«t
1987-88
161
0
0




U
1987
3
0
0




M
1985
145
1
8
0.36-36,7



m
1986-87
62
0
4
tr»ce-2.3



MS
1989-90
120
0
1
0.70




1986
17
0
0




OR
1985-87
137
0
1
0.008



«X
1986
60
0
1
0.23



UA
1988
81
0
0




Wi
1982
26
10
1
2.00-47.00
TOTAL DISCRETE
WELLS




2,030
12
16
tr«c#-47.00
Bfoetyl
Pfcthalat*
pfcthalate)
C
i
TK
1983-86
11
0
0

TOTAL DISCRETE
WELLS




11
0
0 1

| Oioucftrb |
C
	• • *
CA
198S
4
0
0
1
TOTAL DISCRETE
WEILS
1


4
0
0


C.K
..
u
1984-87
22
0
0 1
I
TOTAL DISCRETE
WELLS
|


22
0
o |

NS-111

-------
RATIONAL WELL SAMPLING DATA BY PESTICIDE





WELL SESULTS
«AM£ OF
CONCEN-
TRATIONS
pest mat
«SGUUT08T
STATUS
XCL of KA
<*«/l>
sure
OATE
TOTAL
MELU
SAMPLED
# Of POSITIVE
WELLS

'


TEA*

6 *Cl
< #u
; $iphana*?4
c
m
«
1984-89
610
0
0





1987
1
0
0




*S
1989-90
120
0
0




UA
1988
81
0
0

TOTAL DISCRETE
WELLS




812
0
0

Oiquat U»Us}
$
..

1986-89
14
0 | 0 |



TOTAL DISCRETE
WELLS




14
o | o |

ftiautfotc**
' «,i
0.3
" AL
1988
10
0
0




CA
1984-89
974
0
0




6A
1984-91
76
0
0




«I
1986
5
0
0




IK
1987-88
161
0
0




ME.
1986-87
71
0
0




W
1985-90
754
0
0





1989-90
120
0
0





1986
1
0
0




at
1985-87
70
0
0




Tit
1987-88
188
0
0




VA
1986-90
12
1
5
0.04-2.87
NS-112

-------
NATIONAL WELL SAMPLING DATA BT PESTICIDE
PESTICIDE




WELL RESULTS .
RANCH OF :
CONCEN-: ,
TRATIONS
¦ mm,':
REGULATORY
STATUS -
HCL or HA
Cftg/l)
Lifetime
STATE
DATE
.TOTAL
WELLS
SAMPLED





VEAft

E HCL
< HCL
(Disulfoton)


•41
1982
26
14
0
4.00-100.00
TOTAL DISCRETE
WELLS




2,468
15
5
0.04-100.00
D foton
sulfone

--
HS 1989-90
120
0
0




TX 1987-88
188
0
0

TOTAL DISCRETE
WELLS


i
308
0
0

Di&utfQton
sulfoxide

--
MS j 1989-90
120
0
0

TOTAL DISCRETE
WELLS



120
0
0

D iuron
S
10
AR
1985-87
111
0
0




CA
1984-90
2010
0
82
0.050-3.950



Ft
1909-91
15385
0
9
1.180-5.370



0A
1984-91
70
0
67
1.000-5.000



LA
1987
9
0
0




HS
1989-90
120
0
0
I



OR
1985-87
44
0
0




TX
1988
31
0
2
: 0.01-0.02



! VT
1984-86
4
0
0




WA
1
1988
j
81
0
0

TOTAL DISCRETE
we.ls


1
i
j
'
17,865
0
160
0.C1-5.37
NS-113

-------
NATIONAL WELL SAILING DATA BY PESTICIDE






!' WELL RESULTS
RANGE Of
i'CONCEN-:: -
TRATtONS
j;ota/u
PESTICIDE
REGULATORY
STATUS
MCL or HA
cms/i>
. Lifetime
STATE .
¦ ¦
Total
UELLS
SAMPLED '





. YEAR


MCL
< NCL:
DMPA
C ¦
..
CA
1986-88
107
0
0

TOTAL DISCRETE
WELLS




107
0
0

ONOC
u,c

CA
1984-87
412
0
0

TOTAL DISCRETE
WELLS




412
0
0

EDS (Ethylene
Oibrsiride)
C,R,SRC
0.05
AZ
1986-87
40
0
0




CA
1979-89
1638
45
1
0.006-
4.700



CT '
19S7
2392
469
315
0.02-8.C



FL
1909-91
14949
1552
411
0.010-
755.000
i


OA
1981-87
76
7
3
0.020-
110.00
i
(


; HI
i
1979-87
371
15
13
0.001-
15772.4

|

1 IN
1987-89
174
6
2
0.01-0.85



| HA
1985
239
25
11
0.03-6.9



j OR
1985-87
161
10
10
0.034-
0.172



1
; m
1984-89
181
21
2
0.018-6.3
TOTAL DISCRETE
. UELLS


: 1
i
: i
20,221
2,153
768
0.001-
15772.4
NS-114

-------
NAT1ONAL WELL SAMPLING DATA BY PESTICIDE





WELL RESULTS
RANCE Of'
- -CONCM"""
PEStlCJOE
REGULATOR*
STATUS
HCt or HA
. CMS/13
Lifetime
STATE
- DATE
TOTAL
WELLS
SAMPLED

. .THAT tOH*





TEA??

i mi
< MCL

Bndosut fan
S
..
CA
1979-88
1883
0
2
0.010-
4.500



CT
1987-89
122
0
0




K!
1982 86
3
0
0




tcs
1984
27
0
0




m
1986-87
71
0
1
trace



KH
1986
19
0
0




NJ
1985
66
0
0




VA
1987
6C
0
29
<20



RI
1986
159
0
0

TOIAL discrete
WELLS




2,410
0
32
traee-<20
EndosuHan t

--
AL
1987
13
0
0




HI
1982-86
8
0
0




1A
1983-86
58
0
0




Ik
1986-88
169
0
0




KS
1987
84
0
1
0.062



MS
1982-90
265
0
0




NY
1985-87
122
0
0




TN
1987
1
0
0
I
MS-115

-------
NATIONAL WELL SAMPLING DATA BT PESTICIDE





WELL RESULTS
RANGE OF
C0NCEH-
TRATIOKS
PESTICIDE
REGULATORY
STATUS ¦
HCt. or HA
C»9/l)
Lifetime
STATE
"mte
TOTAL
- WELLS .
SAMPLED





rEAR ;

¦ > MCI '
< HCl
(Endssulfan I)


TX
1937-88
188
0
0 |

TOTAL DISCRETE
WELLS




906
0
1 j
0.062
Endor.u t fan i I

--
AL
1587
13
0
0




HI
1982 86 j
7
0
0
i
i



JA
1983-86 j
58
0
0
t


!
i ,n
1986-88 |
I 169
1
0
0




j-ics
!
1987
84
0
1
[ 0.031
f



i MS
1
1982-90 j
263
0
0
!

1
1

1
i
i n*
1985-87
122
0
i
o !
I
i '
i

i
i
1 TN
i
1987
1
0
I
0 I
!
j

1
( TX
1
1987-88
188
0
0 i
I
J
TOTAL DISCRETE
UELLS
i
| 1
i	

905
0
I
1 I
i
! 0.031 :j
1 ''
Endosulfan
sulfate

i
!
AL
1987
13
0
I
0
t
t


i
CA '
1979-89 j
1273
0
0 i
I
i



HI
1982-86 j
I
5
0
0 i


i
i
i

! i*
I
I
1983-86 |
58
0
0
i-

I
I

j IN
f
1
1985-90 |
1
190
0
2 :
I
0.3-1.4 |j
i!
i
i
i
s

; ks
1989-90 j
120
0
0 I
i
!
i
I
1
i
i

' NY
1985-87 j
I
122 |
0
4 j
<0.05-
0.14
NS-116

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WEIL RESULTS

RANGE OF v.'-.
CONCEN-
TS AT IONS
CM/U
PESTICIDE
REGULATORY
: STATUS
MCl or HA
(M/l)
Lifetime
STATE
DATE
- TOTAL
WEILS
SAMPLED



¦ 1



YEAR

- > MCI
¦'}< MCL

(Endosulfan
sul1 ate)


TX
1987-88
188
0
0

TOTAL DISCRETE
WELLS




1,969
0
6
<0,05-1.4
| EndothalI
s
100
CA
198*.-89
548
0
0

TOTAL DISCRETE
WELLS




548
0
0

Endr i n
U,C,R,Sf?C
2
AL
I
1987 |
14
0
0




CA
1975-89
1811
0
1
0.120-
0.210



CT
1987-89
122
0
0




HA
1984-91
179
0
0




HI
1980-86
14
0
0




IA
1983-86
59
0
0




IL
1985-87
517
0
28
0.004-
0.67



IN
1985-90
190
0
4
0.10-0.26



ICS
1984
1986
107
0
0




ME
1986-87
71
0
0




HO
1986
4
0
0




MS
1982-90
263
0
0




MT
1984-36
22
0
0




NJ
1985-88
186
0
2
0.001-
0.011
NS-117

-------
NATIONAL UELL SAMPLING OAT A BY PESTICIDE






WELL RESULTS

RANGE - :Of= " .
" CfflfCEN- V"
T8AT tONS
PESTICIDE
REGULATORY
STATUS .
; MCL or HA
(M/l)
Lifetime
STATE ^
DATE

"TOTAL
WELLS
SAMPLES





SAR"r-r:;;


> MCL
MCI

(Endrin)


Nf
1985-87
139
0
0




OR
1985-87
44
0
0




' SQ
1984-90
99
O
0


i
1

T* :
1986-87
24
0
0




tx ;
1983-88
199
0
0




wv
1985-87
20
1
3
0,1-3.5
TOTAL DISCRETE
WEILS




4,084
1
38
0.001-3.5
Endrin aldehyde

--
CA
1982-89
1022
0
0




fA
1983-86
59
0
0




IN
1987-88
161
0
0




NY
1985-87
122
0
0

TOTAL DISCRETE
WELLS




1,364
0
0

6PM
:'\e,R

CA
1984-85
9
0
0




MS
1982-90
263
0
0

TOTAL DISCRETE
WELLS




272
0
0

EPIC
• s
¦ *»
CA
1984-89
464
0
0




CA
1984-91
76
0
0




. HI
1986
8
0
0




ME
1986-87
71
0
0

NS-118

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WLL RESULTS
RANCE OF
-CONCEN
TRATIOUS
PESTICIDE -
REGULATORY
STATUS
MCLor HA
(M/O
Lifetime
STATE;
::.'date-:;;
TOTAL
- WELLS '
:. SANPLED











YEAR /

;'S MCL
< HCL


(EPTC)



1985-90
754
0
2
0.01-0.33



N€
< 1989
48
0
0




NY
1985-87
146
0
0




: OR
1985-87
26
0
0




f»
1986
60
0
0




SD
1984-90
99
0
0

TOTAL DISCRETE
WELLS




1,752
0
2
0.01-0.33
EthalfSural in
s,s»»c - '
-- -
IX
1987-88
188
0
0

TOTAL DISCRETE
WELLS




188
0
0

Ethion
S,R
• --
CA
1984-88
572
0
0




cr
1987-89
117
0
0




a
1986-87
36
0
0





1982-86
6
0
0




a •
1985-86
466
0
0




ICS -
1984
27
0
0




NJ :
1985-88
184
0
0




TX
1983-88
199
0
0




UY
1987
6
0
0

TOTAL DISCRETE
WELLS


j

1,613
0
0

NS-119

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WELL RESULTS
RANGE OF
CONCEN-
TRATIONS
CffS/tJ
PESTICIDE
REGULATOR*
STATUS
MCI or HA
Oig/l}
Li fetiine
STATE
DATE
TOTAL
WELLS -
SAMPLED- -'





>' YEAR

> MCt
< MCL
Ethoprop
s,a

CA
1987-89
10
0
a




FL
1985-86
23
0
0




CA
1984-91
76
0
0




HI
1986
7
0
0




iA
1983-89
784
0
0




iM /
1987-88
161
0
0




MO
1987-90
293
0
0




OR -
1985-87
14
0
0

TOTAL DISCRETE
| WELLS




1,368
0
0

Ethyl Alcohol
s
. .
CA
1984
1
0
0

TOTAL DISCKfcJE
UILLS


|

1
0
0

Ethy;an
, U,C,SRC
..
| CA -
1984-87
12
0
0




i;:- CT
1987-89
122
0
0




. HI- :
1982-85
5
0
0




ICS
1984
27
0
0




nj
1985-aa
185
0
0

TOTAL DISCRETE
WELLS




351
0
a

NS-120

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





. . ' mi RESULTS
RANGE OF; :
CONCEN-
TRATIONS
(M/U :
PES DC IDE
HEGULAIOfcr
- STATUS
MCL or HA
(M/t)
Lifetime
STATE
• DATE v-
TOTAL
MELLS
SAMPLED1





YEAft ::

i MCI
< HCL
EtHdiazole
S
-
CA
1989
6
0
0

TOTAL DISCRETE
WE US




6
0
0

ITU


CA
1986-89
65
0
1
0.725



FL
1986-38
47
0
0




ME
1986-87
71
0
0

TOTAL DISCRETE
UEl.S




183
0
1
0.725
fenamiphcs
- S,R
2
' CA
1971-89
763
0
0




FL
1985-87
74
0
0




MS
1989-90
120
0
0




Oft
1985-87
10
0
0




rsc
1987-88
188
0
0




WA
1988
81
0
0

TOTAI DISCRETE
WELLS




1,236
0
0

Fefiamiphofi
Sulfone

-•
CA
MS
1971-89
1989-90
60
0
0




120
0
0

TOTAL DISCRETE
WELLS




180
0
0

NS-121

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WELL RESUltS
RANGE OF
CONCEN-
PESTICIDE
REGOIATORY-
. STATUS-' •"
MCL or HA
U9/1)
LHettme
STATE
DATE
fOTAL
UELLS
SAMPLED

TRATIONS
CdS/U




YEAR

6 «CL
< HCL

Fenamiphos
Sulfoxide


: CA.
1971-89
60
0
0




- --WS- :::
1939-90
120
0
0

TOTAL DISCRETE
WELLS




180
0
0

Fenarimol •
s

CA
1989
6
0
0

TOTAL DISCRETE
WELLS




6
0
0

Fenbutatin-
oxide
• • •
' ..
- ca ;
1985
1
0
0

TOTAL DISCRETE
WELLS




1
0
0

fensutfothion
C,R

. CA
1986-89
44
0
0




GA
1984-91
76
0
0




HI
1986
8
0
0




IN
1987-BB
161
0
0




' OK -
1986
1
0
0

TOTAL DISCRETE ;
HELLS
?
i
¦ 1



290
0
0

. >
Fenthion 5
c

CA :
1986-89
16
0
0




HI
1986
7
0
0




IK
1987-88
161
0
0

TOTAL DISCRETE
WELLS j
!




184
0
0

NS-122

-------
MTIOMI ICLL SMPLIIK MTA BY Pfc. iCIDC





W6U. JESUITS
KAMSE Of
cwew-
TSATfWS
Cw/n
PCSTICiOC
*ECSUUTOM
STATUS
$E1 Of MA I
(M/$ > j
j
STATE
ft*U '
TOTAL
WEUS
SAMPLED
# OF POSITIVE
VEU.S






i *Cl
< m.
f«nucon
C
- I
JL
1986-89
158
0
0
	
TOTAL DISCRETE
WELLS



158
0
0
ftrwaterat*
«.«
•-
M
1986-87
83
0
0




CA
1985-88
4
0
0




*0
1985
58
0
0




TX
1987-88
188
0
0




VA
1986-90
12
0
5
0.01-0.28
TOTAL DISCRETE
WELLS




345
0
5
0.01-0.28
Ftu4i ffop-bwyl
s


1986-90
12
0
7
0.480-20.32
TOTAL DISCRETE
WELLS




12
0
7
0.480-20.32
fluchlereU*
s
-
CA
1984-87
286
0
0




GA
1984-91
76
0
0




1L
1985-87
51
0
0

|


N5
1989-90
120
0
0

TOTAL DISCRETE |
WELLS fl




533
0
0


1 s
, ¦ . * * ::
VA
1989-90
| 126
0
0

TOTAL DISCRETE
WELLS




I "
0
0

NS-123

-------
NATIONAL IELI SAMPLING DATA K1 PESTICIDE





WELL SESULTS
«AN6£ Of
CONGEK-
TftATiOKS
PESTICIOE
«£GULATOftr
STATUS
of HA
STATE
OATC
TOTAL
WELIS
BAWLED
i or POSITIVE
teas




TEAR

i
< *01
f iyomettfron
S
SO
ft*
1985-87
111
0
0




a
1985-89
141
0
0




ri
1986-88
12
0
0




CA
1984-91
70
0
67
1.000-5.000



I*
1987
8
0
0




NO
1986
68
0
1
0.8



MS
1989-90
120
0
0
0.8-5.000
TOTAL DISCRETE
WELLS




510
0
68
?luridoftt
s |
CA
1989 |
•
0
0
I
TOTAL DISCRETE
WELLS
1


4
0
0

fonofos
M
10
a
1986
18
0
0




6A
1984-91
76
0
0




«
1983-89
745
0
4
0.11-0.90



u
1985-86
466
0
0




l«
1986-88
185
0
0




m
1984
27
0
0




m
1985-90
754
0
a




HO
1987-90
293
0
1
0.43




« 1989
1435
0
1
0.05
NS-124

-------
HAT I OHM. UELL SAmtNG MIA IT PESTICIDE





•U «UL» ]
RANGE Of
OONCCK-
TtATIOHS
cm/d
P£STICl£>£
SfifiULATOST
STATUS
>ff(. Of HA
STATE
PATE
TOTAL
WEUS
SAW USD
# OF POSITIVE
VELL5




tea*

s ntx

-------
HAT1GHAL UELL SMPL1N6 MIA BY PESTICIDE





MEU WESU.TS
MIKE Of
COHXK-
THAT 10# S
<**/<>
1
PESTiC10£
*EGUIAT0#T
STATUS
WCt. or HA
(##/*>
tTATt
MTt
TOTAL
WEUS
SAHPl£t>
# of positive
Mas .




raw

i KCL
< act :
(Heptachtor)


l«
1985-90
190
1
3
0.060-0.80



KS
1984
27
0
0




*0
1986-90
205
3
0
0.4-0.8



MS
1982-90
263
0
0




»rr
1984-86
22
0
0




MJ
1985-88
185
0
1
0.001



KY
1985-B7
122
0
0




SC
1974-76
46
0
25
0.01-0.159



•tit
1987
1
0
0




IX
1983-88
199
0
0




VA
1990
100
0
6
0.004-0.009
TOTAL DISCRETE
WELLS




3,241
4
51
0.001-0.8
H«ptaefitor
epoxide

' - SUt '•
AL
1987
12
0
1
0.04-0.05



CA
1975-89
1126
0
0




cr
1987-89
122
0
0




JA
1983-86
59
0
0




U
1983-87
542
0
3
tric«-0.156



IK
1985-90
190
1
1
0.14-0.22



KS
1984
1986
107
0
1
0.026
NS-126

-------
NATIONAL WELL SAMPLING DATA BT P€STICID€





WEU RESULTS
SAUCE OF
CONCEM-
TSATIWS
CM/t)
PESTtCfBJ-
SEGUUUOfiY
STATUS
i£i er MA
U«/i)
STAT C
DATE
TOTAL
WELLS
SAMPtCB
# or POSITIVE
was
J



re**

S HCL
< Htt
(Heptachlor
epoxide)


MA
1986-87
19
0
4
0.04-0.16



MS
1982-90
263
0
0




KT
1984-86
22
0
0




y MJ
1983-88
185
0
0




: *r
1985-87
122
0
0




3C
1974-76
46
0
20
0.01-0.09




1987
1
0
0




TX-:;-:
1983-88
199
0
0




VA
1990
100
0
1
0.055
TOTAL DISCRETE
UELIS




3,115
1
31
tr»ce-0.22
ber«en«

1
Ck
1984-89
921
0
0




HI
1984-85
41
0
0




WS „
1982-90
263
0
4
0.0039-
0.0056



NT
1984-86
22
0
0





1985-87
81
0
0

TOTAL DISCRETE
WELLS




1,328
0
4
0,0039-
0.0056
Hexarinone
S
200
AR
1986
8
0
0




CA
1984-89
52
0
0

NS-127

-------
NATIONAL HELL SAMPLING DATA k PESTICIDE





WEU. RESULTS
KANtiC OF
CONCEIT
TKATWKS
IWU
P£STJC»W
REGULATORY
STATUS
MCL Of MA
Ufl/t >
STATE
OATE
TOTAL
SAMPLED
# OF POSITIVE
v*us




TEA*

t *CL
< HCl
(Hexazinone)


KJ
1985-86
27
0
9
0.060-0.720



HE
1986-87
71
0
0




MS
1989-90
120
0
0




OR
1985-87
137
0
0




TX
1987-88
188
0
0




WA
1988
81
0
0

TOTAL DISCRETE
WELLS




684
0
9
0.060-0.720
fprocfiooe
$
--
m
1986
15
0
0

TOTAL DISCRITE
WELLS




15
0
0

i*obomyt tltSo-
eyane«cetftt«
C
-
GA
1984
1
0
0

TOTAL DISCRETE
WELLS




1
0
0

i sofenphos

--
MA
1986-87
19
0
2
1.17-2.12



«tf
1986-87
78
0
0

TOTAL DISCRETE
WELLS




97
0
2
1.17-2.12
leopropeMn
C J
(A
1984-90
76
0
1
20.000
TOTAL DISCRETE
WELLS
|


76
0
1
20.000
NS-128

-------
NATIONAL WELL SAMPLING DATA IT PESTICIDE





WELL RESULTS
RANGE OF
COHCEM-
TfiATiQKS
u»/1)
MSTJCIM
8ESULAT0RY
STATUS
HCL or MA
<(*8/1J
STATE
DATS
TOIAL
WELLS
SAMPLED
» Of
POSITIVE
VELLS




t£«

I
<
net
Lindane |
(SMStt'lMC)
s,*,s*c
"
1 '
1987 I
14
0
¦




a
1975-89
1890
0
1
180.000



CT
1987-89
122
0
1
0.001-0.005
>


GA
1984-91
179
0
0




Ki
1980-86
14
0
0




u
1984-86
59
0
0




u ;
1985-86
466
0
0




IK
1985-90
191
0
4
0.070-0.10



KS
1984-86
107
0
0




IE
1986-87
71
0
0




MO
1986-90
205
1
0
0.5



US
1982-90
263
0
5
0.0006-
0.047



NT
1984-86
22
0
0




m
1986
12
0
0




1M
1985-88
185
0
10
0.001-0.14



"
1985-87
139
0
0




0*
1985-87
56
0
1
0.005



SC
1974-76
73
0
45
0.01-0.319



Sft
1984-87
57
0
2
0.05



TK
1986-87
24
0
0

NS-129

-------
RATIONAL WELL SAMPLING DATA IT PESTICIDE





WELL *£Sum
RANGE Of
COtCEM-
TRATJOKS
u#/t>
IEST1CUK
tt!aJLAT«y
STATU*
HCl or HA
tw/u
STATE
DATE
TOTAL
WELL*
SAMP LSD
# or
POSITIVE
Wtt*




*««

i
*CL
*
net.
(Lindane)


TX
1983-88
199
0
0




V*
1989-90
126
1
7
0.010-0.326
TOTAL DISCRETE
WELLS


4,474
2
"I
0.0006-
180.000
I four OR
S
--
AS
1985-87
111
0
0




CA
1965-90
225
0
0




ft
1986
8
0
0




«
1984-91
70
0
67
1.000-5.000



m
1986-87
71
0
0




m
1985-90
754
0
0




M
1986-90
269
0
38
0.2-1.9



KS
1989-90
120
0
0




VA
1986-90
12
0
5
0.042-3.794



V!
1982
26
0
1
3.00
TOTAL DISCRETE
WELLS




1,666
0
111
0.042-5.000
fttlAthfon
f
200
CA
1984-89
499
0
1
0.320



ct
1987-89
117
0
0




Fl :
1986-87
36
0
0




a*
1984-91
76
0
0




HI
1982-86
12
0
0

NS-130

-------
MAT I OKA L WCLLL SMPLINC DATA BY PESTICIDE





|: -:.;::yEtp RESULTS
•j
; RANGE OF
^:CQKC£N-
TRATIONS
-:;
-------
NATIONAL WEILL SAMPLING DATA BY PESTICIDE





1 : ¦¦•••WEU.:RESULTS
RANGE Of
¦•.•Cb»C£N.r:,.-: ::
¦'TBArtONS
PESTICIDE . .
REGULATOR*
: STATUSi
MCI or HA
: (m/I)
Lifetime
STATE
DATE'
... TOTAL ..,
WELLS
SAMPLED
.. .UELLS;..;- ::




VEAR

' mi
<
KGL




Har>cczeb
: S ¦ I' "
;::ri:^
1986
60
0
0

TOTAL OlSCRfre
WEILS
|


60
0
0

Naf*fc>
¦ s .
|
CA j 1984-88
437
0
0

TOTAL DISCRETE
WELLS



437
0
0

•-¦MCPA''
some C,'
some S
10
CA
1984-89
173
0
0




!N
1987-88
161
0
0




HN
1985-90
749
0
1
0.13-0.37



MT
1984-90
84
0
3
0.36-5.5



OK
1986
1
0
0




¦ OR
1985-87
70
0
1
5.3



SO
1984-90
99
0
0





1987-88
187
0
0

TOTAL DISCRETE
WELLS



i
I
i
i
1,524
0
5
0.13-5.5
HCPB/ScdSum
Salt '
S
..
CA
1984-85 j
!
10
0
0




IX
1987-88 |
1
187
0
0
!
TOTAL DISCRETE
WELLS




197
0
0

NS-132

-------
NATIONAL UELLL SAMPLING DATA BY PESTICIDE





• WELL
RESULTS
RANGE Of
CW06H-..
PESTICIDE
REGULATORY
STATUS:-
MCI or HA

KCl
7 * :










..Mtcoprop :
s

CA
1987-89
9
0
0




IN
1987-88
161
0
0




M
1986-8?
19
0
0




KT
1984-90
84
0
0




IX
1987-88
187
0
0

TOTAL DISCRETE
WELLS




460
0
0

Mercury
SRC
i
GA
1984-91
5
0
0




HJ
1980
1
0
0




WA
19S8
20
0
3
0.08-0.11
TOTAL DISCRETE
WELLS




26
0
3
0.08-0,11
¦Werphos7/
u,c
..
CA •
1984-89
269
0
0




HI .
1986
4
0
0




IN
1987-88
161
0
0

TOTAL DISCRETE
WELLS




434
0
0

Metalaxyt
s

TN
1986-88
4
0
1
0.77



NC
1983-90
344
0
16
0.38-3.0



OR
1985-87
4
0
0

TOTAL DISCRETE
WELLS




352
0
17
0.38-3.0
NS-133

-------
NATIONAL WEILL SAMPLING DATA BY PESTICIDE





'-''WEtL- RESULTS;-' ; .. „
RANGE Of '
CONCfN-
¦ THAI IONS
cm/O
VfESTlCIDE
REGUlATOHr
STATUS.
MCI or KA
.CM-g/t)
; Lifetime
¦¦ STATE':
. QATSY ;;r-:
:"'::'TOTAt;:: ^
•" WELLS ^'













rEA8":".

v » - ¦
' <




MCL
Hethamidcphos
S.ft : ..


1984-89
779
Q
0




«£ ¦
1986-8?
35
0
4
trace-10
TOTAL DISCRETE
WELLS




814
0
4
trace-10
Nethazole
S

MO-;
1986
40
0
0

TOTAL DISCRETE
WELLS




40
0
0

j Methidsthion
;y,
••
| CA ,
1931-88
262
0
0

TOTAL DISCRETE
WELLS




262
0
0

Hethiocarb


CA
1984-89
219
0
0




NY
1980-91
20955
0
1
1.00
TOTAL DISCRETE
WELLS




21,174
0
1
1.00
Hethorayl

200
CA
1584-89
1296
0
0




: ;CT-:
1987-89
129
0
0




FL
1986-88
51
0
0




GA •
1984-91
69
0
67
3.000-5.000



LA
1987
2
0
0




MO
1986
68
0
1
8.1



MS
1989-90
119
0
0





1986-88
120
0
5
trace-1.0
NS-134

-------
NATIONAL UELL SAMPLING DATA IT PESTICIDE


" 1


VEU. KE5UIT5
RANGE Of |
CONCEK- }
TSATfOKS \
u*/t > j
PESTICIDE
RE&JLATQGY
STATUS
m, or «A
«w/i>
11 frtfuw
STATE
, BATE
TOTAL
VEUS
SAILED
.... ...rw ....
POSITIVE
WELLS




¥£«

* | *
MCI [ HCl
1
(Methowyl)


*Y
1980-91
20955
0
81
1.00-20.00 J



at
1985-37
44
0
0




*2
1984-36
134
0
0




TX
198?-88
182
0
0




«A
1988
61
0
0

TOTAL DISCRETE
WELLS




23,250
0
154
trece-20.00
HethcxycMor
S
40
At
1987
14
0
0




¦CA
1975-89
1230
0
0




CT
1987*89
122
0
0




a
1986-91
179
0
0




KJ
1980
1
0
0




U
1985-36
343
0
0




IN
1986
8
0
0




re
1984-86
107
0
0




*£
1986-87
71
0
0




Ma
1986
4
0
0




«
1989-90
120
0
0




KT
1984-86
22
0
0




*#
1986
17
0
0




HJ
1985-88
185
0
1
0.05
NS-135

-------
NATIONAL WELL SMPL1HG DATA BT PESTICIDE
¦¦ 	




I VEU RESULTS
*AXGE Of
COHOSH-
TSATfOKS
u«/t)
PESTICIW J
REGULATORY
STATUS
MCLW W

-------
RATIONAL WELL MPLM6 DATA IT PESTICIDE
¦	;	1
-



UEU RESULTS
ftAtKE Of
CONCEtt-
TRATlOttS
U«/!>
PESTICIDE
HECULAIOer
STATUS
8£L or HA
Llf«t1nc
STATE
M.T5
TOTAL
weu«
SAHPLSD
# Of
Ksttive
WELLS




YEAR

t
m.
¦ < i
net
Chloride
u
"
a
198687
36
0
0




HI
1984-E7
58
0
2
4.000-
19.000



tA
1984-86
2
0
0




iH
1988
97
0
0




t*S
1989-90
99
0
16
tr«ce-9.0
TOTAL DISCRETE
WELLS




292
0
18
trace-
19.000
Hetoiechlor

100
AS
1986-87
111
0
1
6.9



CA
1985-89
100
0
0




CT
1987-89
137
0
5
0.2-26.0



fit
1985-86
12
0
9
0.1-12.0



ft
1982-91
15294
0
4
0.150-0.520



s M
1984-90
76
0
0




1A
1983-89
915
0
28
0.040-
22.000



IL
1983-88
426
a
7
0.087-12.0



IH
1985-90
184
0
3
0.3-7.9



KS
1986
103
0
0




LA
1987
7
0
0




HA
1986-88
73
0
1
0.24
NS-137

-------
NATIONAL UELL SAMPLING DATA BY PESTICIDE





HELL AESULTS
BAKGE Of
CONCEN-
TRATIONS
Us/t>
PESTICIDE
REGULATORY
STATUS ;
8£k or ha
I(fetfwr
STATE
DATE
TOTAL
WELIS
SAMPU-D
0 or
*osmve
WELLS




TfAK

i
*CL
¦<
wet
(HetolBchlor)


MM
1985-90
754
0
15
0.10-2.4



MO
1986-87
121
1
0
120.0



MS
1989-90
120
0
0




NO
1985-87
113
0
0




#e
< 1989
1002
0
6
0 - 2.32



«M
1986-88
98
0
3
0.4-1.1



BY
1985-87
218
1
6
0.13-112



m
1988-89
599
0
71
0.001-6.031




-------
NATIONAL UELL SAMPLING DATA BY PESTICIDE





WELL RESULTS
RAHCE Of
COICHh::
TRATIONS :
pesticide
REGULATORS
STATUS
fifl. or HA
IffRtiar
STATE
DATE
TOTAL
WELLS
SAMPLES
9 Of
POSITIVE
WELLS




YEAR

*
XCL
*
net
(Hetribuzin) 1


n
1986-88
38
0
0




«A
1984-91
76
0
0




IA
1983-89
913
0
27
0.020-8.1



IL
1983-88
420
0
40
0.01-3.9



t*
1988
97
0
0




ICS
1986-87
187
0
1
0.15



LA
198?
3
0
0




*£
1986-87
71
0
3
tP«ee-0.49



m
1985-90
754
0
3
0.05-0.72



m
1986-90
325
0
23
0.2-14.0



MS
1989-90
120
0
0




HE
1987
491
0
0





1986-88
98
0
1
0.1



on
1988-89
599
0
76
0.001-1.466



OK ¦
1986
1
0
0




OR
1985-87
151
0
0




*1
1986
60
0
0




SO
1984-90
99
0
3
0.002-0.025



VA
1986-90
12
0
8
0.005-2.73



UA
1988
81
0
0

NS-139

-------
NATIONAL HELL SAMPLING DATA BY PESTICIDE





WELL RESULTS
SAMGE OF
ctmuH-
TRATIWS
PESTICIDE
SEO&ATORr
STATUS
MCL W «A
LffttfM
STATE
MT£
TOTAL
WELLS
SAHPLSD
# OF
positive
WEUS






%
MCI
A
Met
(Hetribuiirt)


WI
1982
1986-89
612
0
45
0.033-25.10
TOTAL DISCRETE
WELLS




5,452
0
232
trace-25.10
Katrlbotfn 0k

—
CA
1989
1
0
0
4.000-
19.000



ma
1989-90
120
0
°

TOTAL DISCRETE
WEILS




121
0
0
4.000-
19.000
M«tribw1n
MDK


MS
1989-90
120
0
0

TOTAL DISCRETE
WELLS




120
0
0

.Mtt'trfbuzfn DK

--
m
1969-90
120
0
0

TOTAL DISCRETE
WELLS




120
0
0

M«Vl(^3hOB
s.*

CA
1984-89
420
0
0




£A
1984-91
76
0
0




XI
1986
8
0
0




IV
1987-88
161
0
0

TOTAL DISCRETE
UELLS




665
0
0

| M«>scarbat«
u.c

CA
1986-88
166
0
1
22.000
TOTAL DISCRETE
WELLS
I	




166
0
1
22.000
NS-140

-------
HAT I OKU UELL SAMPLING DATA 1* PESTICIDE





UELL RESULTS
RANGE Of
CO*C£H-
T8ATiO*S
6»«/i>
pesticioe
asaumrat r
STATUS
Of HA
STATE
MT£
TOTAL
tcus
SAMPLED
0 t»
rtsrrm
WELLS




m**

t
*a
m

C,H»C
»«
tk
1984-86
31
0
0




a
1987-89
122
0
0





1982-85
5
0
0




«
1984
27
0
0




lit
1984-86
22
0
0




U4
1985-88
185
0
0




«T
1987
65
0
0




SC
1974-76
46
0
9
0.01-0.437
TOTAL DISCRETE
WELLS




503
0
9
0.01-0.437
not
-------
w'I10HM. WELL SAMPLING DATA BT FESTICIK

-



WELL SSSULTS
IttHCSE
Of
ijurroKS
Cm/d
PCSTtCiOE
REGULATORY
STATUS ,
WCi o»* HA
t«/0
STATE
OATS
TOT At
ME lt$
*WLEP
# or POSITIVE
WELLS




yw	

, t act
* H&
Konuron ' j
C,«c
--
CA
1985-89
222
0
4
0.040-
2.000



CA
1984*91
70
0
67
1.000-
5.000
TOTAL DISCRETE
WELLS




292
0
71
0.040-
5.000
N9t»d
« ' *
•*
CA
1984-89
83
0
0




HJ
1986
3
0
0




IK
1987-88
161
0
0

TOTAL DISCRETE
WELLS




247
0
0

Kephthfltem :
tPC«)
S -
20
CA
1986-87
82
0
0

TOTAL DISCRETE
WELLS




82
0
0

Kapropwidc ,
s
—
CA
1984-89
315
0
0




GA
1984-91
76
0
0

TOTAL DISCRETE
WELLS




391
0
0

Nftptaim
s
. . .
no
1986 J
40
0
0

TOTAL DISCRETE
WELLS



1
40
0
0

NS-142

-------
¦ATtWAI. WELL SAWMHC DATA BY PESTICIDE





mi RESULTS
WWGE
, OF
TftATIOHS
(*#/' >
PCS7ICS0E
REGULATORY
STATUS
H£L or ha
UUtim
STATS
OAT?
TOT At
WtLLS
SWIEC
» Of POSITIVE
WEtlS




ym

I net
« m.
HcborflO
C

CA
1985-89
205
0
0




MS
1989-90
120
0
0

TOTAL DISCRETE
WELLS




325
0 0

Bitrofeo
C
"
CA
1984-88
J 118
0
0

TOTAL DISCRETE
WELLS




118
0
0

Wflvniaori
«

CA
1969
6
0
0

TOTAL DISCRETE
WELLS


TX
1987-88
188
0
0



194
0
0

Octyl
bfcyclotwptene-
diearboxanidft
«
~ ¥
CA
1989
6
0
0
1
TOTAL DISCRETE
WELLS




6
0
0
1
OrganocMoripe
scrMfl

"
a
1984-88
BO
0
0
	



ft
1988
1
0
0




' XT
1984-86
22
0
0




• w
1982
27
0
0

TOTAL DISCRETE I
WELLS 1



1
130
0
0

NS-143

-------
NATIONAL UELL SAMPLING DATA IT CSTICIK





UELL RESULTS
RANGE
Of
COKCfN-
TRATS0NS
Cw/U
pesticioc
SEGUUTONT
STATUS
wet or aa

-------
NATIONAL UELl SAMPLING DATA BY PESTICIDE
'




UELL *SSUIT»
M*G£
Of
ecmcZH-
TKATJONS

KSrtCIOE
REGULATORY
STATUS
H& or a*

-------
NATIONAL WELL SAMPLING MIA BY KSTICIOE





WELL «6SUtfS
KANCX
. OF
CONWH-
TWTfOKS
£m/U
f>£STiCIOE
KCUUTORY
STATUS
mx or HA
(WO
STATE
SATE
TOTAL
WE US
* or POSITIVE
HELLS •




t£A* :

t m.
< Ha
(Parsthion,
ethyl)


a
1985-86
f 343
0
0




Mi
1987-88
161
0
0




KS
1984
27
0
0




HO
1987-90
200
0
1
0.2



W>
1985
42
0
1
0.02



«£
1987
491
0
0




*4
1985-88
184
0
0




OK
1986
19
0
0




OS
1985-87
14
0
0




se
1984-90
99
0
0




• TK
1983-88
188
0
0




VA
1990
100
0
0




wr
1987
6
0
0

TOTAL DISCRETE
UELLS




3,529
0
3
0.02-
99.000
P«rathiont
methyl
.: M'
2
AL
1988
10
0
0




CA
1984-89
373
0
0




CT
1987-89
117
0
0




SA
1984-91
76
0
0




*X
1982-86
12
0
0




3A
19®
24
0
0

NS-146

-------
NATIOUAL IELL SAMPLING DATA RT PESTICIDE





WEU SESULTS
RANGE
Of
COKCEH-
TMTTOttS
PESTICIDE
KttfcATORt
STATUS
rn. or Hft
iWl)
STATE
DATS
TOTAL
WEU.S
1 «mcD
# W POSITIVE
WfilS





I
t #et
< *Ct
(Pirtthion,
nethyl>


' U
1985-86
343
0
0




i*
1987-88
161
0
0




»
1984
27
0
0




HE
1986-87
71
0
0




m
1985-90
754
0
0




NO
1986
68
0
0




»s .
1982-90
263
0
6
0.01-0.256



m
1985
42
0
1
0.04



m .
1987
491
0
0




«j
1985-88
184
0
0




OR
1985-87
14
0
0




81
1986
73
0
0




TX
1983-88
188
0
0




VA
1987
60
0
13
<5.0



VI
1987
6
0
0

TOTAL DISCRETE
UELLS



3,357
0
20
0.01-0.256
4-ttitrophehbt
paraUiiah
R»tsboUt«>
S
60
MS
1982-90
263
0
3
0.004-0.02



HA
1988
81
0
0

TOTAL DISCRETE
UELLS




344
0
3
0.004-0.02
NS-147

-------
NATIONAL IELL SAW* IMC DATA BT PESTICIDE





*U RESULTS
RAtiGE
. or
COKCEK-
TMTJQW
PESTICIDE
REGULATORY .
STATUS
8£L & «*

-------
NATIONAL y£LL SAHPL1HG DATA BY PESTICIDE





. WELL RESULTS:;!.
RANGE
OF
KMCEH-
: WAT JONS
: : (va/D
'.PESTICIDE
REGULATOR*
STATUS
HCL or HA
(M9/0
lifetime
STATE
DATE
... total .
UELLS
SAMPLED
# of posnm •
UELLS




YEAR

» HCL
« HCL
(Pcndimctholin)

!
TX
i
1987-88
188
0
0

TOTAL DISCRETE
WELLS


i

1,405
0
14
0.02-0.900
Pentaehtoro-
phenot 
-------
NATIONAL WELL SAMPLING DATA 8T PESTICIDE





WEIL RESULTS
RANGE
OF
• pesticide'"
REGULATORY
status; "
MCL or HA
(M/U
lifetime
STATE
DATE - ,
TOTAL :
WELLS •:
SAMPLED
: # or positive
WELLS
CONCEN-
mnoHs
Cms/i>




'year'-.-.

> MCL
< MCL

(Pcrmethrin)


va
1986-90
12
0
4
0.01-1.25
TOTAL DISCRETE
WELLS




1,097
0
4
0.01-1.25
Pfiorate ¦
S.R

CA ;
1984.-89
844
0
0




GA
1984-91
76
0
0




HI
1986
a
0
0




1A
1934-89
788
0
0




1L
1935-86
343
0
0




IN
1986-88
185
0
0




KS
1984
27
0
0




MN
1985-90
754
0
0




MO
193?
92
0
0




ME ,
« 1989
38
0
0




OK
1985-87
56
0
0




3D
1984-90
99
0
0




¦ IX - ¦
1988
31
0
0

TOTAL DISCRETE
WELLS




3,341
0
0

Phorate Sulfone J


CA ..
1987-89
12
0
0

TOTAL DISCRETE
WELLS




12
0
0

NS-150

-------
NATIONAL WELL SAMPLING DATA 8* PESTICIDE





well results
RANGE
OF
CONCEN-
TRATIONS
£jig/D
PESTICIDE
REGULATORY
STATUS
MCI or HA
(M9/I>
Lifetime
STATE
: : DAT6»
TOTAt
¦-'¦MEUS
SAMPLED1
# « POSITIVE
WILLS;;






• > MCL

Phorate
'Sulfoxide


CA
1987-89
12
0
0

TOTAL DISCRETE
WELLS




12
0
0

Mioratoxon


CA
1987-89 |
9 | 0
0

TOTAL DISCRETE
WILLS




9 J 0
0

. PhoratQ*on
suHone


CA
1987-89
9
0
0

TOTAL DISCRETE
Wf! i S




9
0
0

Phoratoxon
sulfoxide

--
CA
1937-89
9
0
0

TOTAL DISCRETE
WELLS




9
0
0

Phosalone
0,R
•-
' CA
1984-88
83
0
0




TX
1987-88
188
0
0

TOTAL DISCRETE
WELLS




271
0
0

NS-151

-------
NATIONAL WELL SAMPLING DATA BY PESTICIDE





WE I t
RESULTS
	RANGE
OF
CONCEN-
TRATIONS

-------
NATIONAL UELL SAMPLING DATA IT PESTICIDE





WELL RESULTS
ftAHGE
Of
1CATIONS
PESTICIDE
ffiOJLAiat?
STATUS
or HA
it*n)
tifttlm
STATS
SATS
TOTAL
«U$
SAMH.E0
# OF POSITIVE
WEUS




T£AS

I MCt
< no.
CPiclora*)


-
1966-87
62
0
,




MM
1966-90
749
0
6
0.03-0.63



HO
1986
4
0
0




MS
1969-90
120
0
0




XT
1984-90
100
0
10
0.063-28.0


-
m
1985-86
400
0
23
<0.02-12.8



OK
1986
Z
0
0




SO
1986-90
99
0
1
0.15



TX
1987-88
21B
0
1
1.48-3.15



VA
1989-90
126
0
3
0.029-
20.775



VT
1986-87
4
0
0




Wl
1988
81
0
0




MY
1987-90
105
0
24
0.01-30.0
0.01-30.0
TOTAL DISCRETE
UELLS




2,934
0
74
Pirittic*rb
Stilfone

—
OA
1988
1
0
0

TOTAL DISCRETE
UELLS




1
0
0

Profenofo#
M
* r
T*
1987-88
188
0 | 0

TOTAL DISCRETE
WELLS




188
0 1 0

NS-153

-------
NATU aL UELL SAMP1IK DATA BY PESTICIDE





WEIL SfiSUtTS
JUUKX
OF
Wttfx-
7SATKMS

KSTICtOE
B£
-------
NATIONAL WELL SAMPLIK MTA BY PESTICIDE





WEIL RESULTS
RADGE
Of
CQMCEN
TRATIflUS
(Mm
WSTIC10C
REGULATORY
STATUS
ftCL or HA j
1A8/U
STATE
DATE
TOTAL
VCLIS
WHKEO
» Of POSITIVE
WEILS




V£A»

k HCt

(Prometryri)


,,
1934-86
45
0
0




ii
1987-88
161
0
0




a
1984
27
0
0




»
1983
30
0
0




NJ
1985*88
188
0
0




TX
1987-88
168
0
0

TOTAL DISCRETE
WELLS




1,656
0
1
0.9-1.1
Prooamide
M,e*c
50
€* :
1984-87
254
0
0




MS
1989-90
120
0
0




Oft
1985-87
58
0
0

TOTAL DISCRETE
WELLS




432
0
0

3,5-DicMoro-
beniofe Acid
{PrortaaJde
«etabolit«>

••
CA
1989
6
0
0




UA
1988
81
0
0

TOTAL DISCRETE
WILLS




87
0
0

ProfMBiide
netaboitte
{urepeciff«d)

—.;*«	
CA
1989
6
0
0





1989-90
120
0
0

TOTAL DISCRETE |
WELLS




126
0
0

NS-155

-------
NATIONAL WELL SAMPLING DATA KY PES. C1DE





WELL RESULTS
RANGE
Of
«JKOSN*
IMTIONS
f#9/t>
PCSTICH*
SECUUTflfiY
STATUS
wet or HA

-------
RATIONAL WELL SAW-UK OAT A Vf PESTICIDE





WELL RESULTS
KAXtt
Of
(xmttu-
T RATIONS

PESTICIDE 1
SSGULATORT
STATUS
HCt or HA
lifatiiM
STATE
DATE
TOTAL
WELLS
ED
# W POSITIVE
WELLS




*«A*

fc *0.
<
Propailm
C
10
CA
1984-89
313
0
0




CT
1987-89
139
0
2
0.1



Ml
1984-85
42
0
0




)»
1987-88
161
0
0




M
1984
27
0
1
0.01



m
1983
30
0
0




HS
1989-90
120
0
0




H£
< 1989
173
0
10
0 - 0.11



W
1985-88
188
0
0




PA
1983-84
63
0
1
0.20



tx
1986 90
91
0
1
unknown



VA
1988
81
0
0

TOTAL DISCRETE
WELLS




1,428
0
15
0-0.20
Propha»
•c'"
100
'«
1984-89
609
0
1
6.000



CT
1987-89
129
0
0




MS
1989-90
120
0
0




ftfj
1986-88
63
0
0




Oft
1985-87
58
0
0




WA
1988
81
0
0

TOTAL DISCRETE
WELLS




1,060
0
1
6.000
NS-157

-------
NATIONAL UELL SAWH.ING DATA IV PESTICIDE





WEU «£$um
RAKGE
Of
COKCftt-
TRATJOWS
PESTICIDE
8ECWUIOW
STATUS
K& or Wt
<«/0
lifctito
STATS
Mrs'
TOTAL
WEUS
SAMPLED
$ Of POSITIVE
WELLS




>tw

t m.
< net :

Propaxyr
$,SRP
3
CA
1984-B9
I ...
0
0




*s
	
1989-90
	
119
0
0





1986-87
36
0
0




m
1980-91
20955
4
1
2.0-35.0



m
1988
81
0
0

TOTAL DISCRETE
VEILS




21,405
4
1
2.0-35.0
ProtMophas
Wt
•* 1
CA
1988-89
3
0
0




!R
1987-88
161
0
0

TOTAL DISCRETE
WELLS




164
0
0

NS-158

-------
NATIONAL WELL SAMPLING DATA IT PESTICIDE

'



WELL KESULT8
KAKCE
or
COMCE&-
TSATtOHS
(W/L)
PESTICIDE
REGULATORY
STATUS
Si or HA
LvfetiMt
STATE
DATE
TOTAL
HELLS
SAMPLE?
0 OF POSITIVE
VEILS




Tttft

tHCL
-<#CL
Pyrethrins
U
—
At
1988
1
0
0




«
1984-85
8
0
0




VA
1989-90
126
0
0
	
TOTAL DISCRETE
WELLS




144
0
0
PyHctor ¦
{frfeMofo-
pyndinol}
C
"
na
1986-87
19
0
2
0,10-0.76
TOTAL DISCRETE
WELLS



1
"
0
2
0.10-0.76
Roonol
U,C,ttC
..
CA
1984-89
12
0
0




HI
1986
8
0
0




1L
1985-86
466
0
0




IN
1987-88
161
0
0

TOTAL DISCRETE
WELLS




647
0
0


s
"
CA
1987-88
12
0
0

TOTAL DISCRETE
WELLS




12
0
0

ftotcnolooe
(Sotenooa
metaboUtt)

-•
CA
1988
4
0
0

TOTAL DISCRETE '
WELLS |




4
0
0

NS-159

-------
NATIONAL UELL SMVLIHG DATA BT PESTICIDE





WELL KESULT3
*AWE
Of
-CCMCSK-
TRATIOHS
WO
PtSTiCJDE
REGULATOR!
STATUS
m or
(M/O
STATE
BATE
TOTAL
WEILS
SAW LEO
* of positive
l£U$




WAR

I XCI
* MCI
Rotwene (oth«r
setabolite)

--

1987
8
0
0

TOTAL DISCRETE
WELLS




8
0
0

Sechunetco
C
..
CA
1986-88
49
0
0




1M
1987-88
161
0
0

TOTAL DISCRETE
WELLS




210
0
0


l S
-•
W
1986
65
0
0

TOTAL DISCRETE
WELLS




65
0
0

Sidufon
S
».
CA
1986-89
164
0
0




MA
1986
18
0
0

TOTAL DISCRETE
WELLS




182
0
0

Sinzin*
s
1
CA
1982-90
2931
26
192
0.020-
28.000



CI
1987-89
139
1
9
0.1-10.0



SE
1984-86
36
24
8
0.1-67.0



ft
1909-91
15363
20
2
0.400-
30.800



Gft
1984-91
76
0
0




85 ;
1984-85
42
0
1
0.100



IA
1987
1
0
1
0.980
NS-160

-------
NATIONAL UELL SAMPLING MTA IT PESTICIOE





MEU MSUtTS
HARGE
Of
CWttH-
TRATIONS 1
pcsncsos:
REGUmTORT
STATUS
m ar a
Uf*x\m
STATE
0AT£
TOTAL
WELLS
%M>1&
# OF POSITIVE
«EUS j






x mi
< MCI,
j
(Simazine)

•
ill
1987-89
182
1
.
5.2 |




1984
27
0
0




IA
1987
3
0
0




440
1983
30
0
1
0.1



WE
1986-87
71
0
0




*4
1985-90
754
1
0
0.49-2.58



no
1987-90
200
0
4
0.2-0.65



«
1989-90
120
0
0




XT
1987-89
22
0
1
0.1



W
1985-87
106
0
0
\



#£
< 1989
173
0
13
0-0.69



*4
1985-88
188
0
6
0.1-0.3



m
1986-87
74
3
0
1-4



OH
1988-89
599
2
101
0.001-1.559



or
1986
1
0
0




OR
1985-87
161
0
0




J»A
1983-87
81
3
21
trace-3.4



41!
1986
73
0
0




TX
1983-88
199
0
0




VA
1986-90
198
3
36
0.06-4.21


1
VT
1986-91
438
1
0
3.4 |
NS-161

-------
NATIONAL IELL SAMPLING DATA BY PESTICIDE
, 1



""
WELL HESW.TS
r ""
RANGE
Of
WNCEtf-
TRATIQKS
{jtf/D
PESTICIDE
REGULATORY
STATUS .
Kl or MA
CM/t>
STATE
DATS
TOTAL
WELLS
SAHPLEO
# OF KStTlVS
HELLS



|
TEAR

* xa
< MCI
(Simazine)


J »
1988
81
0
0




W1
1987
5
4
1
0.27-2.20
TOTAL DISCRETE
WELLS




22,374
89
397
0-67.0
SiMton*
m

KS
1984
27
0
0




»
1983
30
0
0

TOTAL DISCRETE
WELLS




57
0
0

Sfattryn
m
--
CA
1984-89
168
0
0




*T
1987-89
139
0
0




VI
1984-85
42
0
0




IN
1987-88
161
0
0




KS
1984
27
0
0




»
1983
30
0
0




4M
1985-88
188
0
0

TOTAL DISCRETE
WELLS




75S
0
0

Sulprofos
M
—
CA
1987-88
2
0
0




HI
1986
8
0
0




IA
1985-87
59
0
1
1,300-1,400
NS-162

-------
miiOHM. NELL SAMPLING DATA IT PESTICIDE





WELL RESULTS
KAKGE
OF
CONCEN-
TRATION
<*9/l)
pcsricioe
REGULATOR*
STATUS
«CL Of *A
U«/i>
STATE
DATE
TOTAL
UELLS
SAHPLEO
« OF POSITIVE
NELLS




TEAR

* HCt
< HCL
CSulprofos)


l "
mr-u
161
0
0
I
TOTAL DISCRETE
WELLS




230
0
1
1.300-1.400
Swep
C

CA
1986-89
58
0
0




KS
1989-90
120
0
0

TOTAL DISCRETE
UELLS




178
0
0

lebuttoiuron
$
$00
CA
1989
29
0
1
20.700-
22.100



*S
1989-90
120
0
0




OK
1986
1
0
0




TX
1975
2
0
2
trace-380.0



MA
1988
81
0
0

TOTAL DISCRETE
UELLS




233
0
3
tr»ee-380
ttrbacH
$
«r.
tA
1965-89
8
0
0




i.A
1987
3
0
0




*$
1989-90
120
0
0




at
1985-87
56
0
1
8.9



UA
1988
81
0
0




«v
1985-87
20
0
5
0.3-1.2
TOTAL DISCRETE
WELLS




288
0
6 I
0.3-8.9
NS-163

-------
NATIONAL UELL SANPtlW DATA BT PESTICIDE
1 ' V ¦' -




UELL SESULTS
tume. or
TRATIWS
ot«m
PSSTtClOE
REGULATOR*
STATUS
WCL Of HA
STATC
SATE
TOTAL
WEI IS
SAMPLED
# Of POSITIVE
WCU.S




*«*

t HCL
* *cl
lerbufos
M
e.9
M
1984-91
76
0
0




U
1984-69
787
6
1
0.500-12.000



iL
1985-86
466
0
0




3H
1986-90
206
2
0
12.0-20.0



m
1986-90
649
0
0




TO
1986-90
325
0
1
0.06



MS
1989-90
120
0
0




Ml
1987-88
11
0
0




«e
< 1989
1435
0
1
0.02



PA
1985-87
24
0
0




Rl
1986
24
0
0




SB
1984-90
99
0
0

TOTAL DISCRETE
WELLS




4,224
8
3
0.02-20.0
Twbufos
Sutfor>e

< ..
IA
1986
13
0
0

TOTAL DISCRETE
WELLS




13
0
0

T
-------
NATIONAL VEU SANPillK DATA BT PESTICIDE





WELL RESULTS
fiANGE Of
GGNCEN-
TRATIO#S
(M/t>
f>tSTtC!OE }
REGULATORY
STATUS
MCI or 8A
<«/D
STATE
DATE
TOTAL
WELLS
SAMPLED
* Of POSITIVE
HELLS




TW

% WX
* *CL
?«rbutryn
C
"
tt
1984-89
242
0
0
I



!#
1987-88
161
0
0




tx
1986
1
0
0

TOTAL DISCRETE
WELLS




404
0
0

f»tr«chloro-
«ihyl«n#
:tT«tr«chlofo-
t
i .

1983
2
0
2
0.007-0.200


	
' . VA
1989-90
126
0
42
0.002-0.196
TOTAL DISCRETE
WELLS



128
0
44
0.002-0.200
Tetmhtar*
vfnphos
s

CA
1984-89
12
0
0




V:r
1987-88
161
0
0

TOTAL DISCRETE
WELLS




175
0
0

T«trjkH fori
u.c
»«
a
1979-87
147
0
0
|
TOTAL DISCRETE
J WELLS




147
0
0
|
TMotwmearb
S
--
CA
1985-89
270
0
0




NO
1986
65
0
2
0.2-0.3
TOTAL DISCRETE
WELLS




335
0
2
0.2-0.3
NS-165

-------
RATIO*- WELL SWUNG DATA »T PESTICIDE

•



UELt RESULTS
fiAJKE Of
CCKCEfl-
TRATIOKS
cw/n
PESTICIDE
BEGUUrtKir
STATUS
wet of aA
STATE
MTI
TOTAL
t£Lt.5
SAKPi£0
* Of POSITIVE
HELLS




TlA*

i net.
* Ktt.
Tfijob«nearfe ill
Sulfoxide jll
—
CA
«.
157
0
0
|
TOTAL DISCRETE |
WELLS III



157
0
0


C

OR
1985-87
IE
0
0

TOTAL DISCRETE
WELLS




12
0
0

¦ HetJiyt
$,6**
..
CA
1988
5
0
0
		
TOTAL DISCRETE
WELLS




3
0
0
T «tapf>eoe

-------
NATIONAL WELL SMPLIUfi DATA BY PESTICIDE
I




WELL RESULTS
RAMSE OF
CONCEN-
TRATIONS
c*«/o
1 PESTICIDE'
SEoiUToer
STATUS
ItClOTM

-------
NATIONAL WELL SAMPLING DATA Sf PESTJ IDC





«ELt 8ESULTS
«AJK£ Of
COHCEN-
tRATIONS
U«/t>
PtSTIClOE
REGULATORY
STATUS
WCL or «A

-------
NATIONAL WELL SAW. MG MTA BY PESTICIDE
1




" •' I
«ANce or
caecEti-
T8ATI0KS
| PCSTtClM?
REOiLATOBlf
STATUS
WCL or 8A

-------
NATIONAL well sampliik data IY KSTtCIDE





WELL RESULTS
JUN&E or
COKE#-
TRATIOW
(MS/O
KSTICHK
aEOJUTORT
STATUS
Kkw a*
STATi
CATC
TOTAL
WELLS
SAMPLES
# Of POSITIVE
WELLS




fEA*

t ICL
< ftCt

-------
NATIONAL WELL SMPLI1G DATA IT PESTICIDE





«GLL W«a.T< .
aura or
CONCEN-
TRATIONS
PESTJCIDJ
MsCUUTOR*
•STATUS
Hflwa*

-------
Intentionally Blank Page
1
i
I
I
i

-------
Pesticides in Ground Water Database - 1992 Report
TABLE 2: WELL DATA BY STATE

-------
Intentionally Blank Page

-------
NATIONAL HELL SMPLING DATA NT STATE
STATE
TYPES Of WELLS
SOURCE Of
CONTANINATION
CNUK8EH OF WEU$>
OSINKIHC MATES
MXITQRiMC
OTHER
TOTAL
SHPLD
* MCL
« net
TOTAL
S»>U5
£
na
«
HCL
TOTAL
SWLC
k
MCL
net
tifU'
K*
WK
AtabMB
10
0
4
11
0
1
3
0
1 I 6
0
0
Alaska
0
0
0
0
0
0
0
0
o I 0
0
0
Arkartsae
53
0
0
0
0
0
66
1
0
0
1
0
Arizona
40
0
1
0
0
0
0
0
0
1
0
0
California
10034
1096
859
18
4
3
273
36
49
0
0
2047
Conriectlcwt
2474
476
321
187
5
52
0
0
0
853
1
0
Colorado
0
0
0
0
0
0
4
0
4
4
0
0

0
0
0
36
24
8
0
0
0
32
0
0
Florida
17882
1630
621
28
0
1
243
78
32
2362
0
0
Georgia
114
10
44
3
2
0
92
11
26
93
0
0
Hanan
574
27
98
0
0
0
0
0
0
125
0
0
Idaho
15
0
0
0
0
0
0
0
0
0
0
0
'lillridf*
522
2
48
18
0
18
14
0
5
58
15
0
.Indiana
493
15
19
38
0
5
2
2
0
40
1
0
Iowa
627
23
159
75
a
26
24
0
8
216
0
0
Kenarj
211
7
26
0
0
0
3
0
3
0
0
36
Kentucky
0
0
0
0
0
0
0
0
0
0
0
0
Louis tana
9
0
2
0
0
0
3
0
0
0
0
2
Maine
466
28
155
24
0
9
0
0
0
192
0
0
Maryland
71
8
16
15
6
9
9
2
0
41
0
0
Mao*achuc«tt«
516
127
93
54
10
16
1
1
0
247
0
0
HfcMaan
35
11
1
0
0
0
4
0
0
12
0
0
*imesota
667
16
219
82
5
32
5
0
3
51
2
222

263
1
199
0
0
0
0
0
0
200
0
0
Missouri
300
17
95
0
0
0
25
1
4
117
0
0
Hontana ' .
103
1
22
5
0
1
16
0
1
19
6
0
¦Nebraska
1846
6
168
70
4
36
364
12
115
112
2
229
Nevada
0
0
0
0
0
0
0
0
0
0
0
0
ti«r Haacsltff* :
13
0
0
0
0
0
12
0
0
0
0
0
Ne« Jtrsey
176
4
19
0
0
0
67
7
25
55
0
0
NS-175

-------
HAT1OKAl UFIL SAMPLING DATA IT STATE
1



TYPES OF VEILS


::
SOURCE OF
J ST*IE
bftlMtlMfi WATEft
HON!TQRIKS
OtHt*
CONTAMINATION
{KJMBEF Of WELLS)
1
TOTAL
5Htt.fr
t X£L
< HCL
TCTAl
3W>IP
fc
HCl
<
wa
TOTAl
S«>L0
*
#Cl
t
«a
«fu"
W*
u*x'
NeuHexie©
0
0
0
0
0
0
0
0
0
0
0
0
New York
21168
5756
1672
48
7
3
3
0
1
7408
31
0
(wrth
C»r»Uf»
443
2
95
0
0
0
3
0
0
"
0
0
Horthf>»kot«
402
0
26
113
0
4
0
0
o
19
10
1
-Ohio
1462
10
348
0
0
0
0
0
0
158
0
0
Oklahoma
50
0
0
0
0
0
15
0
0
0
0
0
Oregon
161
13
101
4
0
0
0
0
0
114
0
0
P«nr!sylv#nf« :
56
6
23
35
1
31
0
0
0
51
4
6
Mibcte Island
1816
51
99
10
7
0
0
0
0
157
0
0
South
Carolina
188
11
123
6
0
0
0
0
0
75
0
61
south C»tcot«
0
0
0
99
1
63
0
0
0
64
0
0
Terr>es»ee
11
0
2
0
0
0
17
0
1
0
0
3
'.Texas
252
45
28
7
0
2
252
28
31
25
77
32
Utah
0
0
0
0
0
0
0
0
0
0
0
0
Vermont
424
8
12
12
0
0
10
0
0
18
2
0
Virginia
203
9
132
8
6
2
0
0
0
147
2
0
Wa&Mrmtoo
168
25
29
7
1
2
7
0
2
56
2
1
West Virginia
14
0
3
0
0
0
6
1
1
0
5
0
Vf sconsin
1255
66
87
360
139
50
16
0
0
282
44
16
tfywilng
78
0
26
27
0
16
0
0
0
26
0
16
TOTAt
65,865
9,509
5,993
1,400
222
390
1,559
180
312
13,731
205
2,672
NFU = Known or Suspected Mormat Field Use
PS = Known or Suspected Point Source
UNK = Unknown
NS-176

-------
Pesticides in Ground Water Database - 1992 Report
APPENDIX I - PESTICIDE CROSS-REFERENCE TABLE

-------
PESTICIDE CROSS-REFERENCE TABLE
CHEMICAL NAME

HCL
C*g/i>
v-IHA'
Cjjg/lJ
. . PESTICIDE
CATEGQ8T
REGULATORY
STATUS
i•Haphtftoi



Insecticide
C
1,2,4-THcHlordbenzene

9
9
Herbicide
u,c
1,2-D
1,2-D fch16roprop®r»




-':1,2-Dfchtor6etham

5

Fumigant
s
1,2-6frtl0roi>rop4rie ¦

5

Fumigant
c
1,3-0
JJfchioropropene l; ....




1,3-Dichloropropene
Oichloroproperw




2-Chloroat(yl-
diethyldithiocarbamate
" CDEC :




2(2,4-Dichlorope salt
0 i chS orcprop




2,4-0

70

Herbicide
S,SRPre
2,4-OB



Herbicide
S,SRPre
2,4-Dfchlorob*n2oic acid



Possible
degradate or
impur\ty

2 ,4-DichIorophcnoxyacetic
acid





2,4-ftfnitrop&enoi



Acarfcide
insecticide
u,c
2,4-DP
IDichlorprep




2.4,5-1

70

Herbicide
C,SRC
2,4,5-Trichl oropherloxy-
acctic acid
2,4(5-1






50

Herbicide
C,SRC
2,4,6-Trichtorophenol
Trichlorophenol -




¦ 2,6-di«thylsni Une
Alaehlor


Degradate

3-Hydraxycarbofuran::
Carbofuran


Degradate

3-Ketoesrbofuran &
3-Ketocarbofuran (phenol)
Carbofuran


Degradate

:'3r5-bicht'orobemoic aclid::: .
Pronamide


Degradate

>'-NUrophenoV -
Parathion, methyl

60
Degradate
Fungicide
S
4(2,4-Dichlorophenoxy)
butyric acid
¦2,4-M:




4(2,4-06), Butoxyethanol
ester





APPENDIX 1-1

-------
PESTICIDE CROSS-REFERENCE TABLE
C8EHICAL HAHC
REFERENCE
HCL
(jtg/D
LHA

-------
t"*T,^T*T/^TT\F r'TVAPO T% I I "! .'Tir'lLlfH|F *T* A TlT F
PESTICIDE CROSS-REFERENCE TABLE
CHEMICAL *AME
teFEftrxcs
#Ci
(*9/1)
IB*
<#»/!>
wsriciue
catcsorv
seeuuToer [
STATUS I
Bartw>



Herbicide
c 1
Baygon
Pnooiur




6eodt



Insecticide
C,SRC
BHD (D
xtifldw* ¦




Sromafiti


90
Herbicide
S
8romid«
Sodiun bromide




Broa»xyn< t



Herbicide
5
Sufancarfc



Insecticide
C
Butwhfw



Herbicide
C
Sutyiate


350
Herbicide
s
Csptafot



Fungicide
c
Coptan



Fungicide
s,ssc
Csrbaryi


700
Insecticide
s
Carbendazin



Fungicide
c
Carbofuran

40
40
Insecticide
Acaraeide
Fungicide
Nemat icicle
S,R,SRC
Carbonari pfianol
Carbofuran |

Oegradate

Carbofufan, totai
Carbofuran I

Parent ~
dogradates
SRC
Carbon disulfide


Funigant
Fungicide
u
Carbon tetrachloride
| S

Fire retardant
in funigant
formulations
SRC
Carbophertothion


Insecticide
Acaricide
C
CsrbopheootM on, Aethyt
I

Insecticide
Acaricide
U
APPENDIX 1-3

-------
PESTICIDE CROSS-REFERENCE TABLE
CKEMtCAt KMC

net
(w/l)
IKA
«STICI0E
U?E«Ofit
KGUJtfOftY
STATUS
Xtrboxin


700
Furigicida
S
COEC



Herbicide
c
Chioranfcen


100
Herbicide
u.c
CMordane

2

Insecticide
Termi ticide
C,SRC
Cblordeeone



Insecticide
C,SRC
Chtordi»#f«nt



Insecticide
Acaricide
Ovacidc
C,SRC
CJitorfenae



Herbicide
U.c
Chiorfens on



Acaricide
u.c
Chloroallyi etcohoi



Insecticide
c
CMorobenzi l«t«



Insecticide
Acaricide
C,SRc
p-Chtoro*«-rresot



Fungicide
Antimicrobial
s
O-Chloro-o-crwtol





Chloroform

100

Funigant
C,SRP
Chlorooab



Fungicide
S
Chloropicrln



Funigant
Warning agent
S,R
Chtorothalttvft



Fungicide
S
Chtoroxuron




C
CMorproohwi



Herbicide
s
ChtorpyrifOB

20

Insecticide
s
Chlorpyrifos. methyl



Insecticide
s
ChtersMUurm



Herbicide
s
Chlorthal dimethyl
DCPA




C«5Wf





Copper salts
Copper


Insecticide
Herbicide
Antimicrobial
Fung i c i de
some S
some U
Copper oxides
Copper


Insecticide
Herbicide
Fungicide
S
Counaphos '



Insecticide
s
Crufornate '



Insecticide

Cyarmrir»e


1
Herbicide
S,R,SRC
APPENDIX 1-4

-------
PESTICIDE CROSS-REFERENCE TABLE
CHSWCAL «AHE
REFERENCE
HCL
LHA
CMJ/O
PESTICIDE
CATESOST
REGULATORY
STATUS
Cyatiiete

200
200


Cyanide, caiciun or
potassium
Cyarwide


Rodent icicle
U
Cyanaide, sodiun
Cyani de


Rodenticide
S,R
Cycloate



Herbicide
S
Cypermethrifi



Insecticide
S,R
Cypraiir*



Herbicide
C
Oacthal
DCP A




Dacthal diacid
DCPA acid metabolites




Dulapon ..

200
200
Herbicide
U,C
DBCP '

0.2

Ftmigant
C,R,SRC
DCBA
.2,4 *Dichlorobenzoic
-'acid:::::;:;;-::-"?/'




DCP
1,2-Dichtoropropine




DCPA


4000
Herbicide
S
DCPA acSd metafcolitea
DCPA


Degradate

D-D Mix
: 1, Z-0 ichloroproparte • -
' and D)chlor«Jfopene;:: '




DOT



Insecticide
c
ODD . . -
DDT


Degradate
SRC
DDI
DDT


Degradate

DO VP
-DicMorvos '




DEF
Tribufos


Insecticide
Acaricide
C,R
Deoetofv-- ..



Insecticide
Acaricide
C
Demeton-methyl



Insecticide
Acari cide
c
Demeton-S



Degradate

Demeton-S sulfone
Demetori-S


Degradate

Des*ethyl:atrazine - ----
Atraiine


Degradate

Dwisopropyl atraiihe
Atrazine


Herbicide
C,R
DiatUte



Herbicide
C,R,SRC
Diaiinon


0.6
Insecticide
Fungicide
Nematicide
S,SRC
Dibromochloropropane
"obcp-:;




APPENDIX 1-5

-------
PESTICIDE CROSS-REFERENCE TABLE
CHEMICAl MAM& :
i ¦.'REFERENCE':''
' MCI
IHA
fM/l)
,-¦ pesticide.-.
7 " CATEGORY' ¦"¦':.'¦
REGULATORY
:¦: ¦STATUS'.".


Oitxjtyl phthalate



Insect
repel I ant
u.c
Dicemba


200
Herbicide
s
Olchlobenit



Herbicide
s
o-CHchiorobenzene - . .

i 600
600
Antimicrobial
u
p-pich lcrobenier>e

75
75
Insect icide
Fungicide
Rodentictde
Antimicrobial
s
- A
Dichloropropane





Dfchloroproperui



Nematicide
Funi gant
S,R,SRP
Diehiorprop



Herbicide
S,SRPre
Diehiorprop, butoxyethanol
ester
Dichlorprop




Olchlorvos



Insecticide
S,SRP
DfCOfOl ;



Insecticide
Acaricide
S,SRC
Cicrotophos



Insecticide
S,R
Dieldrin ':



Insecticide
C,SRC
Oiethylhexyl phthalate
'Oioctyl phthalate




Dimethoate



Insecticide
Acaricide
S,SRC
ftinoseb

7
7
Herbicide
C,SRC
Oini trocresol
ONOC




Oicetyl phthetate



Acaricide
c
Dicxeearb 	




c
Dicaathion



Insecticide
C,R
Oiphenamid


200
Herbicide
c
Oicust

20
20
Herbicide
s
Dicuat dibromide and
various salts
Diquat.




Disutfotoo


0,3
Insecticide
Acaricide
S,R
Oisulfoton »jlfone
Disulfoton


Degradate

Disulfoton sulfoxide
Disulfoton


Degradate

Diuron


10
Herbicide
S
, . • : _ 	• •
0KPA . ..



Fly larvicide
C
APPENDIX 1-6

-------
PESTICIDE CROSS-REFERENCE TABLE
. CHEN1CAI. «AKE


s.m
CMS/l)
tHA
(M/O

SEGUlATORY
Status
REFERENCE'
PESTICIDE
'•^CATEGORY
o*oc



Insecticide
Herbicide
Fungicide
Antimicrobial
u.c
DNOC, sodfun salt

DNOC'.




EDB

Ethylene dibrotnide




EBOC compounds

Maneb,;,Mancori>, .•
Zineb-



SRC
. Eodosulfao



Fungicide
Antimicrobial
S
Endosulfanl: 1 -
Endosulfan


Isomer

Endosulfsn H
Endosulfan


Isomer

CrKlOSuif SfT-SOl'ffttiSr'•
Endosulfan


Oegradate

gndothalt -,:/

100
100
Herbicide
S
... ¦

2
2
Insecticide
U,C,R,SRC
Endrin aldehyde
Endrin


Degradate

EPH



Insecticide
Acaric^de
C,R
£PTC	



Herbicide
S
Ethalfturalin



Herbicide
S,SRC
Ethion



Insecticide
Acaricide
S,R
Ethoprcp



Insecticide
Fungicide
Nematicide
S,R
Ethyl- alcohol



Disinfectant
S
••'Ethylan'.-''-



Insecticide
U,C,SRC
Ethylene
bisdithiocarbamate
compounds
Maneb, Hancozet?,-':.
Zineb -




Ethylene dibrowide

0.05

Insecticide
C,»,SRC
Ethylene dichloride
1,2-OichIoroethane ¦"




Ethylene thiourea
ETU .




Ethyl parathion
Parathion, ethyl




. Etrftifaiole



Fungicide
s
ETU
Maneb


Cegradate

Fenac
Chlorfenac




fenfimiphos


2
Insecticide
Fungicide
Nemati cide
S,R
APPENDIX 1-7

-------
PESTICIDE CROSS-REFERENCE TABLE
CHEM1CAI MAKE
RIFERENCE
MCI 1 CHA *
C*g/D | (P3/1>
PESTICIDE
CATEGORY
REGULATORY
STATUS
; fenaaiphos-sulftww
Fenamfphos


Degradate

Fenanipfios sulfoxide
Fenamiphos


Degradate





Fungicide
S
Fenbutetin-o^ide



Insecticide
Acaricide
S
FemuUotMoo



Insecticide
Fungicide
Nematicide
C,R
fenthion ¦



Insecticide
C
fenuron



Herbicide
c
Fenvalerate



Insecticide
S,R
Ftus? if op-butyl,



Herbicide
S
FtuchloraHn



Herbicide
S
Fiumetrat fn



Herbicide
s
r // 	
j Ftuonecurori:.


90
Herbicide
s
Fluridone



Aquatic
herbicide
s
Fonofos


10
Insecticide
S,R
Formaldehyde


1000
Fungicide
Antimicrobial
U
: GI yphbsat i.::::

700
700
Herbicide
s
Glyphosate isopropylemine
salt
Gtypfiosate




Guthion
: Azfnphos-Ktetbyl




HCH (a,8,4)
8HC¦(£.8,J>




HCH (D
tlrttent




Heptachlor

0.4

Insecticide
C,SRC
lieptachlof epoxide
Heptachlor
0.2

Degradate

' HeisaelUoroberii'erte

1

Seed
protectant

Hexazfnone


200
Herbicide
s
Hydroxyalachlor ;
Alachlor


Degradate

ylprodione':



Fungicide
s
Isobornyt thiocysnoacetace



Insecticide
c
Isofenpbos : : :



Insecticide
Herbicide
S,R
.Jsopropolin



Herbicide
€
APPENDIX 1-8

-------
PESTICIDE CROSS-REFERENCE TABLE
CHEMICAL SAMS-
REFERENCE
{«[/!)


:PEsficioe;-:v
CATEGORY

' REGULATORY;
STATUS • :\-,
Kepone
"Chlordecora'




lindane ;:

0.2
0,2
Insecticide
S,R,SRC




Herbicide
S,SRP
Hatathion


200
Insecticide
S
Maiaoxon
Malathion


Degradate

Mancoieb



Fungicide
S
Harteb



Fungicide
S
HCPA


10
Herbic ide
some C,
some S
HCPA acids, salts, esters
- HCPA -




::HCPB



Insecticide
S
HCPB salts, esters
MCPB . ..




MCPP salts, esters
Mecopcop ¦




HCFPA
.'Heeoprop :




Hecoprop ¦¦¦¦¦¦¦



Herbicide
S
Mercury -

2
2

SRC
Wcrpftos :



Fungicide
Herbicide
u.c
Metalaxyl •: ¦



Fungicide
s
Methamidophos •	 • -



Insecticide
Acaricide
S,R
Methanol«



Herbicide
S
MetMdathion



Insecticide
Acaricide
S,R
Methiocerb



Insect icide
Acaricide
Molluscicide
Rodent icide
Bird repel I ant
S,R
Hethoety I ...


200
Insect i cide
S,R
MethoxyeMor

40
40
Insecticide
Acaricide
s
Methyl bromide



Insecticide
Antimicrobial
S,R
Methyl carbophenothion
Carbophenothion, :
methyl




Methyl isothiocyanate



Insecticide
Fungicide
Herbicide
S,R
Methyl par.icxoo
Parathion, methyl


Degradate

APPENDIX 1-9

-------
PESTICIDE CROSS-REFERENCE TABLE
CHEMICAL NAH5
REFEREHCfi

lHA
t»9/l)
PESTtCICi
CATEGORY
ftECDUTORY
STATUS
Methyl parathion
PsratNfon, methyl




Methyl trithion
Carbopfcenothion,
: methyl




Methylene chloride



Insecticide
U
Wetotachior


100
Herbicide
S
Mfttribuanty


200
Insecticide
s
MatPibuiirt DA.
Metribuzin


Degradate

Hetribuli ri OAOIC
Metribuz in


Degradete

Hetrlbuzln DK
Metribuzin


Oegradate

Mevinphos



Insec t i c i de
Acaricide
S,R
Nexacsrbate



Insecticide
u,e
Mirex



Insecticide
C,SRC
HoUnate 	



Herbicide
s
MoUnate sulfoxide
Moh'nate


Degradate

Manocfotophos



Insecticide
Acaricide
C,R
Honuron



Herbicide
C,SRC
Mated



Insecticide
Acaricide
S
Naphthalene


20
Insecticide
S
Napr opsin ide



Insecticide
S
KaptaUm



Herbicide
s
:Neburon



Herbicide
c
Nemagon
^ OBCP:




Mitrofen ..



Herbicide
c
p-Nitrophenol
-•4-Wftroph«nbl




Hor.achlo."
Chtordorie


Impurity in
formulation

Korflurazon



Herbicide
s
Octyl btcycloh«ptem-v'.:
: jicsrtoxiinidr"



Insecticide
f ung i c i de
Antimicrobial
S
Ortho-d i ch I or cbenzene
^.O'ftichtortoeniene.




Oryialiri 	



Herbicide
s
Ovex
Chlorfensan - v.




APPENDIX I-1G

-------
PESTICIDE CROSS-REFERENCE TABLE
CHEMICAL .NAME
¦ ¦ REFERENCE
MCL
CM9/1)
w/u
.-'^pEsncior".:.-
categort;--;;
REGULATORY
V::-:STATUS': :
Oxaoryl

200

Insecticide
Acaricide
Fungicide
Nematicide
s,»
Oxychlordarve
Ctilordane


Animal
metaboli te

- Oxytfewetah-aethyt'



Insecticide
Acaricide
S,R,SRP
Oxydifcutfoton



Insecticide
Acaricide
C
Oxyftuorfen : • 	



Herbicide
S,SRC
Para-chlorometacresol
p-Chtoro-m-cre-sot




para-Dichlorobenzene see
p-D ichlorobenzene, listed
at dichlorobenzene
p-Chloro-o-crcscl





"Paraquat.'


so
Herbicide
S,R
Paraquat dichloride
"ParaquatJ - ::-




Parathion
Parathion, ethyl '




Parathion, ethyl



Insecticide
S,R,SRC
Parathion, methyl

2

Insecticide
S,R
• ¦	;	
PCNB :-



Fungicide
S,SRC
PCP
Pent ach I orophenot




Pebulate



Insecticide
Herbicide
S
pendimethalin



Herbicide
s
Putsch lorophenol

1

Insecticide
fungicide
Antimicrobial
S,R,SRP
PermethHni



Insecticide
S.R
Perthane
Ethylsn :




-5>hOr«t«: ' 1 .:'



Insecticide
S,R
::Pharatc: sulfone
Phorate


Degradate

Phorate sulfoxide -
Phorate


Degradate

Phoratoxon
Phorate


Degradate

Phoratoxon suIfone
Phorate


Degradate

.phoratoxon sulfoxide
Phorate


Degradate

vphosalw.



Insecticide
Acaricide
U,R
- Phosmet



Insecticide
S
APPENDIX 1-11

-------
PESTICIDE CROSS-REFERENCE TABLE

REFERENCE


t«A
{«}/»
PESTICIDE
CATEGORY

CHEKJCAl' NAME
HCL
REGOtATOftt
STATUS ; r:
Phosmet oxygen analog :
Phosmet


Degradate

Phosphemidon



Insecticide
C,R
Pieto rm

500
500
Herbicide
S,R
Pirimicarb



Aphidicide
C
Pirimicarb sulfonc
Pirimicarb


Degradate

Profenofos



Insecticide
S,R
Prof luralff»-:::



Herbicide
C
Ptbnecarb :



Insecticide
nr (in us)
Proneton .


100
Herbicide
Antimicrobial
S
Prcwetryn .



Herbicide
s
Proruwiide ' ¦


50
Herbicide
S,R,SRC
Propachtor .


90
Herbicide
S
Propanit'



Hcrbicido
S
Propargite '



Insecticide
Acaricide
S
Propailne


10
Herbicide
c
Propham .


100
Herbicide
c
Propoxyr.i


3
Insecticide
p
S,SRr
Propyzamide
Prtmamide





Prothiofos
Prothfophos





Prothiophos



1nsec 11c fde
NR
Pypethrifj&.:.';:.:. •



Insecticide
Fungicide
Ant imicrobi al
U
Pyriclor



Herbicide
c
Rondel...



Insecticide
ll,C,SRC
Rotenolone
Rotenonc


Degradate

Rotsnone



Insecticide
Acaricide
Piscicide
s
Secbumetars



Herbicide
c
Sethoxydim



Herbicide
s
Siduron



Herbicide
s
Si I vex
2,4,5-TP ;




Siirarine ,

1
4
Herbicide
s
APPENDIX 1-12

-------
PESTICIDE CROSS-REFERENCE TABLE
CHEKICAt HAME ;
; REFERENCE '
MCL
{jig/n
tHA
• PESTICIDE
CATEGORY
{REGULATORY
STATUS •
Simetone:



Herbicide
NR
Simetryn



Herbicide
NR
Sodium bromide
Browide,"


Insecticide
Fungicide
Herbicide
Antimicrobial
S

Sodiun cyanide
Cyanide




Suiprofos :J



Insect icide
S,R
" Snep ' '



Herbicide
c
TCA and salts
Trichloroacetic acid




TCE
Trichloroethene :




Tebuthiuroft :


500
Herbicide
s
Telone
Oichloropropene "




TerbacU/;^:


90
Herbicide
s
Terbufos


0.9
Insecticide
fungicide
Nematicide
S,R
terbufos sutfeme .
Terbufos


Degradate

Terbuthylazine



Herbicide
Algaecide
s
Terbutryn



Herbicide
c
Terrazole
Etridiolcle




1 Tetrachloroethylene

5

Fumigarit
c
' Tetracbtorvlnphos



Insecticide
s
Tetradifon




u,c
Thani to
Isoboryl
thiocyaraocetate




j Thiobencarb



Herbicide
s
[ Thioberwarb sulfoxide



Degradate

' Thiophanatt:



Fungicide
c
Thiophanats-methyl . .



Insect icide
Fungicide
S,SRC
Tordon
Picloram




Toxapherte

3

Insecticide
U,R,SRC
Trelomethrin



Insecti cide
S, R
irans-norachlor ¦ :
{ ' • .............
I-
chlordsne


Impurity in
fonmjtation

| Triadimeftm :



Fungi cide
s !
APPENDIX 1-13

-------
PESTICIDE CROSS-REFERENCE TABLE
CHEMICAL NAME
REFEiENa;v.ry:v-:';.:;;
mV
(*9/15
LHA
f p-e/13
PESTICIDE ¦
CATF.C08*
•R£euLfcro»r
STATUS
Tributes



Herbicide
S
Trichloffon'-'-".-"- • ¦



Insecti cide
S
Trichloroacetic acid'::



Herbicide
U
T r i ch I oroberszene
1,2,4-:
Trichlorobeniene




Tri ch' toroethem





Trichloroethylene
'•'•T ri eti lores the w ¦'
5

Funigaot
c
: TrichtoronatC®)



Insecticide
c
• Tm ch t'orophenol 1 j! .



Fungicide
Herbicide
Antimicrobial
u,c
Tri ehlorophon
' THehtor fors : ::








Insecticide
Herbicide
s
; Tr i eye 1 aidt e ' - -



Fungicide
NR
THfturaUn


5
Herbicide
S,SR,C
T r i th i on
Carbopbe^h on




Tunic
Hethozoter!




'UrwU/Urea "'



Antimicrobial
U
'.VemQl6t«.::V::-:.



Herbicide
S
Vorlex
: 1 f2*0ichtoropropon
-------
PESTICIDE CROSS-REFERENCE TABLE
R Restricted Use: The pesticide has been classified as a Restricted Use
Pesticide under 40 CFt Cart 1, Subpart 1. It is therefore restricted to
use by a certified applicator, or by or under the direct supervision of a
certified applicator.
U Unsupported: The producer(s> of the pesticide has not made or honored a
commitment to seek reregistration, conduct the necessary studies, or pay
the requisite fees for registration of the product.
c Canceled: The active ingredient is no longer contained in any registered
pesticide products,
MR Hot Registered for use in the United States
A tn Hawaii both dichloropropane and 1,2-dichloropropane appear in the data.
APPENDIX 1-15

-------
Pesticides in Ground Water Database - 1992 Report
APPENDIX II - NATIONAL SURVEY OF PESTICIDES IN DRINKING
WATER WELLS

-------
NATIONAL SURVEY OF PESTICIDES IN DRINKING WATER WELLS
At this time the Pesticides in Ground Water Database does not contain data from
the National Survey of Pesticides in Drinking Water Wells (NPS). These data have been
recently analyzed and published.3 OPP is currently working on importing the results of
the pesticide analyses, so that they will be available when the PGWDB becomes part of
the Pesticide Information Network. The following is a short description of the NPS and
a summary of findings from the NPS.
The NPS is a joint project of F.PA's Office of Drinking Water and Office of
Pesticide Programs. This survey is the first national study of pesticides, pesticide
degradates and nitrate in drinking water wells. The Survey has two principal objectives:
1) to determine the frequency and concentration of pesticides and nitrate in drinking
water wells nationally; and 2) to improve EPA's understanding of how the presence of
pesticides and nitrate in drinking water wells is associated with patterns of pesticide use
and the vulnerability of ground water to contamination. The focus of the Survey was on
the quality of drinking water in wells, rather than on the quality of ground water, surface
water or drinking water at the tap. The Survey was designed to yield valuable
information on both the frequency and levels of pesticides, pesticide degradates and
nitrate in rural domestic (private) and community (public) drinking water wells on a
nationwide basis. The Survey was not designed to provide an assessment of pesticide
contamination in drinking water wells at the local, county or State level.
More than 1300 wells were sampled, some in each State, for 127 analytes. Nitrate
was the most commonly detected analyte in these wells. Based upon the NPS results
EPA estimates that nitrate is present at or above the analytical minimum reporting limit
of 0.15ug/L in about 52.1% or community wells, and 57% of rural wells nationwide.
The survey detected pesticides and pesticide degradates much less frequently than
nitrate. Twelve of the 126 pesticides and degradates were found in the sampled wells.
EPA estimates that 10.4% of community wells and 4.2% of rural domestic wells in the
United States contain pesticides or pesticide degradates at or above the analytical
minimum reporting limit. The two most commonly found pesticides were DCPA acid
metabolites (degradate of dimethyl tetrachloroterphthalate) and atrazine. The following
is a list of the pesticides found in each type of well in alphabetical order.
Community:	atrazine, DCPA acid metabolites, dibromochloropropane,
dinoseb, hexachlorobenzene, prometon, simazine.
Rural Domestic: alachlor, atrazine, bentazon, DCPA acid metabolites,
dibromochloropropane, ethylene dibromtde, ethylene thiourea,
gamma-BHC (lindane), prometon, simazine.
Appendix II-1
'U.S. Goveinrrwrt Priming Offtc®: 1393 - ?17-I0ft'6095t

-------