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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

University of New Mexico

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

 

71

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.103 ppb42ND - 0.260 ppb
20150.0543 ppb72ND - 0.190 ppb
20160.438 ppb164ND - 2.30 ppb
2017ND160ND
20180.0325 ppb121ND - 0.390 ppb
20190.354 ppb1611ND - 0.710 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
2014-01-1720140017140.260 ppb
2014-04-152014012256ND
2014-07-152014022282ND
2014-10-1620140326090.150 ppb
2015-01-1320150013710.190 ppb
2015-04-132015011311ND
2015-07-1320150200120.190 ppb
2015-10-132015030757ND
2015-10-132015030756ND
2015-10-132015030758ND
2015-10-132015030755ND
2016-01-1120160008712.30 ppb
2016-01-1120160008732.10 ppb
2016-01-1120160008742.10 ppb
2016-01-1120160008720.500 ppb
2016-04-192016011059ND
2016-04-192016011058ND
2016-04-192016011057ND
2016-04-192016011060ND
2016-07-132016020056ND
2016-07-132016020057ND
2016-07-132016020058ND
2016-07-132016020055ND
2016-10-172016030074ND
2016-10-172016030073ND
2016-10-172016030076ND
2016-10-172016030075ND
2017-01-102017000733ND
2017-01-102017000736ND
2017-01-102017000735ND
2017-01-102017000734ND
2017-04-052017009778ND
2017-04-052017009779ND
2017-04-052017009777ND
2017-04-052017009776ND
2017-07-112017019661ND
2017-07-112017019664ND
2017-07-112017019663ND
2017-07-112017019662ND
2017-10-102017029145ND
2017-10-102017029144ND
2017-10-102017029143ND
2017-10-102017029146ND
2018-04-042018009641ND
2018-04-042018009640ND
2018-04-042018009639ND
2018-04-042018009638ND
2018-07-092018018568ND
2018-07-092018018565ND
2018-07-092018018566ND
2018-07-092018018567ND
2018-10-0120180280780.390 ppb
2018-10-012018028079ND
2018-10-012018028080ND
2018-10-012018028081ND
2019-01-1020190007660.410 ppb
2019-01-1020190007670.580 ppb
2019-01-1020190007680.710 ppb
2019-01-1020190007690.640 ppb
2019-04-042019008474ND
2019-04-042019008475ND
2019-04-042019008476ND
2019-04-042019008477ND
2019-07-0220190181020.530 ppb
2019-07-0220190181040.680 ppb
2019-07-0220190181030.440 ppb
2019-07-0220190181010.460 ppb
2019-10-022019028147ND
2019-10-0220190281460.380 ppb
2019-10-0220190281450.400 ppb
2019-10-0220190281440.430 ppb