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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Mountain Peak SUD

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

70

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20144.16 ppb1612ND - 12.5 ppb
201510.6 ppb1611ND - 36.9 ppb
201612.6 ppb1610ND - 30.8 ppb
201711.1 ppb1612ND - 32.2 ppb
20188.71 ppb1612ND - 19.8 ppb
201922.0 ppb1613ND - 97.4 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
2014-03-11Q14076520046.60 ppb
2014-03-11Q1407652003ND
2014-03-11Q14076520025.40 ppb
2014-03-11Q14076520013.20 ppb
2014-05-05Q14144780066.90 ppb
2014-05-05Q1414478005ND
2014-05-05Q14144780046.30 ppb
2014-05-05Q14144780038.90 ppb
2014-07-29Q14316880071.20 ppb
2014-07-29Q14316880061.30 ppb
2014-07-29Q1431688008ND
2014-07-29Q14316880091.40 ppb
2014-10-24Q14540430046.20 ppb
2014-10-24Q1454043003ND
2014-10-24Q145404300212.5 ppb
2014-10-24Q14540430016.60 ppb
2015-03-17Q15098460044.00 ppb
2015-03-17Q1509846003ND
2015-03-17Q15098460023.50 ppb
2015-03-17Q15098460012.20 ppb
2015-04-15Q15142530091.10 ppb
2015-04-15Q1514253010ND
2015-04-15Q15142530121.30 ppb
2015-04-15Q1514253011ND
2015-07-16Q152750700836.9 ppb
2015-07-16Q1527507007ND
2015-07-16Q152750700634.4 ppb
2015-07-16Q152750700536.3 ppb
2015-10-19Q154089700416.8 ppb
2015-10-19Q1540897003ND
2015-10-19Q154089700214.9 ppb
2015-10-19Q154089700118.3 ppb
2016-01-26Q1603400001ND
2016-01-26Q1603400004ND
2016-01-26Q1603400002ND
2016-01-26Q1603400003ND
2016-06-23Q162581500430.8 ppb
2016-06-23Q162581500310.00 ppb
2016-06-23Q162581500227.7 ppb
2016-06-23Q162581500126.2 ppb
2016-09-02Q163553400419.1 ppb
2016-09-02Q1635534003ND
2016-09-02Q163553400219.9 ppb
2016-09-02Q163553400117.0 ppb
2016-10-27Q164595600514.7 ppb
2016-10-27Q164595600820.2 ppb
2016-10-27Q1645956007ND
2016-10-27Q164595600616.1 ppb
2017-02-14Q170636400410.8 ppb
2017-02-14Q1706364002ND
2017-02-14Q170636400310.00 ppb
2017-02-14Q170636400110.2 ppb
2017-05-11Q171946600219.5 ppb
2017-05-11Q1719466004ND
2017-05-11Q171946600118.1 ppb
2017-05-11Q171946600332.2 ppb
2017-07-11Q172815800115.6 ppb
2017-07-11Q172815800210.4 ppb
2017-07-11Q1728158003ND
2017-07-11Q172815800412.1 ppb
2017-11-27Q176005500411.2 ppb
2017-11-27Q1760055003ND
2017-11-27Q17600550029.20 ppb
2017-11-27Q176005500117.7 ppb
2018-02-22Q18074710048.40 ppb
2018-02-22Q1807471002ND
2018-02-22Q18074710036.40 ppb
2018-02-22Q18074710016.10 ppb
2018-04-09Q181439001911.6 ppb
2018-04-09Q181439002010.5 ppb
2018-04-09Q181439002213.3 ppb
2018-04-09Q1814390021ND
2018-08-31Q18351620087.30 ppb
2018-08-31Q1835162003ND
2018-08-31Q183516200711.5 ppb
2018-08-31Q18351620029.30 ppb
2018-12-03Q184894600416.8 ppb
2018-12-03Q184894600118.3 ppb
2018-12-03Q184894600319.8 ppb
2018-12-03Q1848946002ND
2019-02-27Q190836200237.9 ppb
2019-02-27Q190836200153.1 ppb
2019-02-27Q19083620032.10 ppb
2019-02-27Q190836200497.4 ppb
2019-05-29Q192950101634.6 ppb
2019-05-29Q1929501015ND
2019-05-29Q192950101425.8 ppb
2019-05-29Q192950101322.1 ppb
2019-08-05Q195063801014.0 ppb
2019-08-05Q1950638009ND
2019-08-05Q195063800814.4 ppb
2019-08-05Q195063800714.4 ppb
2019-12-10Q197957800113.6 ppb
2019-12-10Q197957800411.9 ppb
2019-12-10Q1979578003ND
2019-12-10Q197957800210.9 ppb