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National Drinking Water Database


Dichloroacetic acid in California


Dichloroacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]

The Most Polluted Communities in California

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

Ranked by highest average Dichloroacetic acid level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Cathedral Oaks
Loma Rica, CA
1406 of 657.17 ppb
(35 to 84 ppb)
2Sa#16 Sumner Hill
Madera, CA
1002 of 249.5 ppb
(44 to 55 ppb)
3Tierra Buena Mhp #1
Yuba City, CA
291 of 134.9 ppb
(34.9 ppb)
4Ramona Municipal Wd
Ramona, CA
30,0003 of 332.33 ppb
(30 to 36 ppb)
5Lake Alpine Water Company
Arnold, CA
2,6503 of 329.67 ppb
(28 to 31 ppb)
6Strathmore Public Util Dist
Strathmore, CA
1,9041 of 129 ppb
(29 ppb)
7Mcclure Boat Club, Inc.
Snelling,, CA
2212 of 228 ppb
(18 to 38 ppb)
8City of Angels
Angels Camp, CA
2,8429 of 927.87 ppb
(16 to 38 ppb)
9Sonora Water Company Inc
Jamestown, CA
5002 of 227.65 ppb
(23.9 to 31.4 ppb)
10Howell Mountain Mutual Water Company
Angwin, CA
1,50019 of 1927.54 ppb
(16.53 to 45.3 ppb)

Health Based Limits for Dichloroacetic acid

StandardDescriptionLevel
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.7 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.60 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.70 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.100 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5000 ppb

Violation Summary for Dichloroacetic acid in California

There are no violations reported for this contaminant in California