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.
| State | Water Suppliers with Butachlor contamination | |
|---|---|---|
| Systems | Population | |
| Texas | 2 | 117,627 |
| California | 2 | 108,716 |
| New Mexico | 1 | 24,302 |
| New York | 1 | 800 |
| Maryland | 1 | 184 |
| Total | 7 | 251,629 |
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
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Delhi Cwd Delhi, CA | 5,302 | 1 of 6 | 0.16 ppb (0 to 0.97 ppb) |
| 2 | Luke / Newpage Luke Mill Luke, MD | 184 | 3 of 11 | 0.13 ppb (0 to 0.5 ppb) |
| 3 | Hart Municipal Water System Hart, TX | 1,221 | 1 of 1 | 0.11 ppb (0.11 ppb) |
| 4 | Mcwa, Genesee West Rochester, NY | 800 | 1 of 4 | 0.02 ppb (0 to 0.08 ppb) |
| 5 | Bmwd Southside San Antonio, TX | 116,406 | 1 of 6 | 0.02 ppb (0 to 0.12 ppb) |
| 6 | Rancho California Water District Temecula, CA | 103,414 | 1 of 37 | 0.01 ppb (0 to 0.43 ppb) |
| 7 | New Mexico State University Las Cruces, NM | 24,302 | 1 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 1985 | ACETANILIDE, 2-CHLORO-2',6'-DIETHYL-N-(BUTOXYMETHYL)- | • mutagenic - Positive mutation assay: Mutation in Micro-organism (other micro-organisms ) |
| RTECS®- Mutation Research 1983 | ACETANILIDE, 2-CHLORO-2',6'-DIETHYL-N-(BUTOXYMETHYL)- | • mutagenic - Positive mutation assay: Mutation in Micro-organism (Salmonella typhimurium ) |
| RTECS®- Mutation Research 1987 | ACETANILIDE, 2-CHLORO-2',6'-DIETHYL-N-(BUTOXYMETHYL)- | • mutagenic - Positive mutation assay: Cytogenetic Analysis (hamster ovr) |
| RTECS®- Mutation Research 1987 | ACETANILIDE, 2-CHLORO-2',6'-DIETHYL-N-(BUTOXYMETHYL)- | • mutagenic - Positive mutation assay: Sister Chromatid Exchange (rat oth) |
| RTECS®- Mutation Research 1995 | ACETANILIDE, 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 1985 | RTECS®- Journal of Agricultural Science. (Cambridge Univ. Press, 32 E. 57th St., New York, NY 10022) V.1- 104,571,1985 |
| RTECS®- Mutation Research 1983 | RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 116,185,1983 |
| RTECS®- Mutation Research 1987 | RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 188,241,1987 |
| RTECS®- Mutation Research 1987 | RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 188,311,1987 |
| RTECS®- Mutation Research 1995 | RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 344,63,1995 |
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