The Power of Information

National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Butachlor


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

Butachlor is an herbicide for rice and is used to control annual grasses and broadleaf weeds.

 
Detected
Found above
health guidelines
Found above
legal limit
States
5
-
-
Water utilities
7
-
-
People Served
251,629
-
-

Health Concerns for Butachlor:


Butachlor Exposure by State

Water utilities in 5 states have reported detecting Butachlor in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Butachlor contamination
SystemsPopulation
Texas2117,627
California2108,716
New Mexico124,302
New York1800
Maryland1184
Total7251,629

The Most Polluted Communities

7 water utilities reported detecting Butachlor in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Butachlor level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Delhi Cwd
Delhi, CA
5,3021 of 60.16 ppb
(0 to 0.97 ppb)
2Luke / Newpage Luke Mill
Luke, MD
1843 of 110.13 ppb
(0 to 0.5 ppb)
3Hart Municipal Water System
Hart, TX
1,2211 of 10.11 ppb
(0.11 ppb)
4Mcwa, Genesee West
Rochester, NY
8001 of 40.02 ppb
(0 to 0.08 ppb)
5Bmwd Southside
San Antonio, TX
116,4061 of 60.02 ppb
(0 to 0.12 ppb)
6Rancho California Water District
Temecula, CA
103,4141 of 370.01 ppb
(0 to 0.43 ppb)
7New Mexico State University
Las Cruces, NM
24,3021 of 1< 0.01 ppb
(0.01 ppb)

Testing Summary for Butachlor

Are tests routinely required for Butachlor by federal law?No
Water suppliers reporting tests for Butachlor (2004-2009):13,153 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.4 per year

Cancer

Type of concern: Reference:
One or more in vitro tests on mammalian cells show positive mutation results RTECS®- Mutation Research 1987
One or more in vitro tests on mammalian cells show positive mutation results RTECS®- Mutation Research 1995
One or more in vitro tests non-mammalian cells show positive mutation results RTECS®- Journal of Agricultural Science 1985
One or more in vitro tests non-mammalian cells show positive mutation results RTECS®- Mutation Research 1983



Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
RTECS®- Journal of Agricultural Science 1985ACETANILIDE, 2-CHLORO-2',6'-DIETHYL-N-(BUTOXYMETHYL)-• mutagenic - Positive mutation assay: Mutation in Micro-organism (other micro-organisms )
RTECS®- Mutation Research 1983ACETANILIDE, 2-CHLORO-2',6'-DIETHYL-N-(BUTOXYMETHYL)-• mutagenic - Positive mutation assay: Mutation in Micro-organism (Salmonella typhimurium )
RTECS®- Mutation Research 1987ACETANILIDE, 2-CHLORO-2',6'-DIETHYL-N-(BUTOXYMETHYL)-• mutagenic - Positive mutation assay: Cytogenetic Analysis (hamster ovr)
RTECS®- Mutation Research 1987ACETANILIDE, 2-CHLORO-2',6'-DIETHYL-N-(BUTOXYMETHYL)-• mutagenic - Positive mutation assay: Sister Chromatid Exchange (rat oth)
RTECS®- Mutation Research 1995ACETANILIDE, 2-CHLORO-2',6'-DIETHYL-N-(BUTOXYMETHYL)-• mutagenic - Positive mutation assay: Cytogenetic Analysis ( human lym)



references

government/industry list/academic study reference
RTECS®- Journal of Agricultural Science 1985RTECS®- Journal of Agricultural Science. (Cambridge Univ. Press, 32 E. 57th St., New York, NY 10022) V.1- 104,571,1985
RTECS®- Mutation Research 1983RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 116,185,1983
RTECS®- Mutation Research 1987RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 188,241,1987
RTECS®- Mutation Research 1987RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 188,311,1987
RTECS®- Mutation Research 1995RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 344,63,1995

"RTECS®" is a United States trademark owned and licensed under authority of the U.S. Government, by and through MDL Information Systems, Inc.