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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

United Water Cons District

Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

48

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND80ND
2016ND80ND
2017ND80ND
2018ND80ND
20190.625 ppb82ND - 3.00 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-105867-025-0920ND
2014-02-105867-024-0845ND
2014-05-085867-025-1000ND
2014-05-085867-024-0925ND
2014-08-135867-025-1035ND
2014-08-135867-024-1015ND
2014-11-105867-025-0900ND
2014-11-105867-024-0840ND
2015-02-095867-024-0840ND
2015-02-095867-025-0938ND
2015-05-125867-024-0906ND
2015-05-125867-025-0930ND
2015-08-125867-024-0942ND
2015-08-125867-025-1010ND
2015-11-125867-024-1025ND
2015-11-125867-025-1100ND
2016-02-105867-024-0850ND
2016-02-105867-025-0940ND
2016-05-095867-024-0852ND
2016-05-095867-025-0920ND
2016-08-115867-024-0930ND
2016-08-115867-025-1000ND
2016-11-095867-024-1008ND
2016-11-095867-025-1120ND
2017-02-085867-025-1124ND
2017-02-085867-024-1050ND
2017-05-105867-025-0932ND
2017-05-105867-024-0904ND
2017-08-095867-025-1052ND
2017-08-095867-024-1110ND
2017-11-085867-025-1200ND
2017-11-085867-024-1130ND
2018-02-125867-024-1006ND
2018-02-125867-025-1100ND
2018-05-085867-024-1107ND
2018-05-085867-025-1040ND
2018-08-085867-025-1043ND
2018-08-085867-024-1113ND
2018-11-155867-025-0910ND
2018-11-155867-024-0940ND
2019-02-125867-025-1051ND
2019-02-125867-024-1126ND
2019-05-095867-025-0955ND
2019-05-095867-024-1035ND
2019-08-145867-025-1133ND
2019-08-145867-024-1203ND
2019-11-145867-025-10553.00 ppb
2019-11-145867-024-11252.00 ppb