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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

City of Atwater

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND120ND
20150.156 ppb161ND - 2.50 ppb
2016ND160ND
2017ND160ND
2018ND160ND
20190.194 ppb161ND - 3.10 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
2014-03-125806-903-0910ND
2014-03-125806-902-0935ND
2014-03-125806-901-0815ND
2014-03-125806-900-0735ND
2014-05-215806-903-1125ND
2014-05-215806-902-1040ND
2014-05-215806-901-0930ND
2014-05-215806-900-0815ND
2014-09-175806-903-0830ND
2014-09-175806-902-0700ND
2014-09-175806-901-0800ND
2014-09-175806-900-0630ND
2015-03-115806-901-1120ND
2015-03-115806-902-1030ND
2015-03-115806-903-1145ND
2015-03-115806-900-1050ND
2015-06-165806-903-0930ND
2015-06-165806-902-1100ND
2015-06-165806-901-1000ND
2015-06-165806-900-1030ND
2015-09-225806-901-0820ND
2015-09-225806-900-07282.50 ppb
2015-09-225806-903-1005ND
2015-09-225806-902-0930ND
2015-12-075806-902-0745ND
2015-12-075806-901-0830ND
2015-12-075806-903-0915ND
2015-12-075806-900-0700ND
2016-03-235806-900-0830ND
2016-03-235806-902-0915ND
2016-03-235806-901-1000ND
2016-03-235806-903-1100ND
2016-06-225806-901-0930ND
2016-06-225806-900-0715ND
2016-06-225806-902-0800ND
2016-06-225806-903-0845ND
2016-10-065806-903-1045ND
2016-10-065806-900-0945ND
2016-10-065806-902-0800ND
2016-10-065806-901-1015ND
2016-12-065806-903-1100ND
2016-12-065806-900-0920ND
2016-12-065806-902-0840ND
2016-12-065806-901-1015ND
2017-03-085806-903-0932ND
2017-03-085806-900-0721ND
2017-03-085806-901-0835ND
2017-03-085806-902-0755ND
2017-05-095806-900-0945ND
2017-05-095806-903-1015ND
2017-05-095806-901-0930ND
2017-05-095806-902-1000ND
2017-09-125806-903-0715ND
2017-09-125806-900-0830ND
2017-09-125806-901-0800ND
2017-09-125806-902-0915ND
2017-12-055806-902-0913ND
2017-12-055806-903-1035ND
2017-12-055806-901-0737ND
2017-12-055806-900-0825ND
2018-03-205806-900-0630ND
2018-03-205806-903-0715ND
2018-03-205806-902-0700ND
2018-03-205806-901-0645ND
2018-05-165806-900-0630ND
2018-05-165806-903-0715ND
2018-05-165806-901-0645ND
2018-05-165806-902-0700ND
2018-08-305806-902-0800ND
2018-08-305806-903-0830ND
2018-08-305806-901-0730ND
2018-08-305806-900-0700ND
2018-11-295806-901-1129ND
2018-11-295806-903-1203ND
2018-11-295806-900-0916ND
2018-11-295806-902-1030ND
2019-02-275806-901-1129ND
2019-02-275806-900-0916ND
2019-02-275806-903-1203ND
2019-02-275806-902-1030ND
2019-06-195806-903-0900ND
2019-06-195806-902-0820ND
2019-06-195806-900-0750ND
2019-06-195806-901-0715ND
2019-09-275806-900-0945ND
2019-09-275806-903-0915ND
2019-09-275806-902-1015ND
2019-09-275806-901-0845ND
2019-12-235806-904-0810ND
2019-12-235806-903-08553.10 ppb
2019-12-235806-902-0830ND
2019-12-235806-901-0745ND