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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Elon

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

 

86

Samples

0

Samples exceeding legal limit (MCL)

86

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201423.0 ppb8820.0 ppb - 31.0 ppb
201526.8 ppb141414.0 ppb - 39.0 ppb
201618.9 ppb161611.0 ppb - 30.0 ppb
201722.3 ppb161617.0 ppb - 26.0 ppb
201819.4 ppb161615.0 ppb - 24.0 ppb
201914.8 ppb161611.0 ppb - 21.0 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
2014-02-1192189366002-222.0 ppb
2014-02-1192189366001-222.0 ppb
2014-05-2992203302001TTH-231.0 ppb
2014-05-2992203302002TTH-227.0 ppb
2014-08-1992214112009TTH-220.0 ppb
2014-08-1992214112010TTH-220.0 ppb
2014-11-1892226246001TTH-221.0 ppb
2014-11-1892226246002TTH-221.0 ppb
2015-02-2514.0 ppb
2015-02-2515.0 ppb
2015-05-2038.0 ppb
2015-05-2037.0 ppb
2015-05-2039.0 ppb
2015-05-2038.0 ppb
2015-08-2425.0 ppb
2015-08-2423.0 ppb
2015-08-2425.0 ppb
2015-08-2423.0 ppb
2015-11-1722.0 ppb
2015-11-1726.0 ppb
2015-11-1729.0 ppb
2015-11-1721.0 ppb
2016-02-1692286793002TTH-221.0 ppb
2016-02-1692286793003TTH-221.0 ppb
2016-02-1692286793004TTH-230.0 ppb
2016-02-1692286793001TTH-228.0 ppb
2016-05-2492298939002TTH16.0 ppb
2016-05-2492298939003TTH-215.0 ppb
2016-05-2492298939004TTH-226.0 ppb
2016-05-2492298939005TTH-227.0 ppb
2016-08-2292309970011TTH-215.0 ppb
2016-08-2292309970014TTH-215.0 ppb
2016-08-2292309970013TTH-215.0 ppb
2016-08-3092310689001TTH-219.0 ppb
2016-11-1592319857001TTH-211.0 ppb
2016-11-1592319857002TTH-211.0 ppb
2016-11-1592319857003TTH-217.0 ppb
2016-11-1592319857004TTH-216.0 ppb
2017-02-1492329991001TTH21.0 ppb
2017-02-1492329991003TTH21.0 ppb
2017-02-1492329991004TTH23.0 ppb
2017-02-1492329991002TTH22.0 ppb
2017-05-1692340947003TTH24.0 ppb
2017-05-1692340947002TTH23.0 ppb
2017-05-1692340947001TTH23.0 ppb
2017-05-1692340947004TTH23.0 ppb
2017-08-2392352713001TTH26.0 ppb
2017-08-2392352713002TTH26.0 ppb
2017-08-2392352713003TTH26.0 ppb
2017-08-2392352713004TTH26.0 ppb
2017-11-1492363453001TTH19.0 ppb
2017-11-1492363453002TTH17.0 ppb
2017-11-1492363453003TTH19.0 ppb
2017-11-1492363453004TTH18.0 ppb
2018-02-2692374989004TTH 23.0 ppb
2018-02-2692374989003TTH 23.0 ppb
2018-02-2692374989002TTH 22.0 ppb
2018-02-2692374989001TTH 24.0 ppb
2018-05-2292385734004TTH 16.0 ppb
2018-05-2292385734001TTH 17.0 ppb
2018-05-2292385734002TTH 15.0 ppb
2018-05-2292385734003TTH 17.0 ppb
2018-08-2892397713004TTH 18.0 ppb
2018-08-2892397713003TTH 16.0 ppb
2018-08-2892397713002TTH 17.0 ppb
2018-08-2892397713001TTH 18.0 ppb
2018-11-2692408354001TTH 21.0 ppb
2018-11-2692408354002TTH 18.0 ppb
2018-11-2692408354003TTH 23.0 ppb
2018-11-2692408354004TTH 22.0 ppb
2019-02-1992418331001_377021.0 ppb
2019-02-1992418331003_377019.0 ppb
2019-02-1992418331004_377018.0 ppb
2019-02-1992418331005_377018.0 ppb
2019-05-2192430102001_377015.0 ppb
2019-05-2192430102005_377015.0 ppb
2019-05-2192430102003_377016.0 ppb
2019-05-2192430102002_377014.0 ppb
2019-08-2692443067002_377013.0 ppb
2019-08-2692443067004_377013.0 ppb
2019-08-2692443067003_377013.0 ppb
2019-08-2692443067001_377011.0 ppb
2019-11-1992454503004_377013.0 ppb
2019-11-1992454503003_377012.0 ppb
2019-11-1992454503002_377012.0 ppb
2019-11-1992454503001_377014.0 ppb