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EWG's Tap Water Database — 2019 UPDATE

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Dichloroacetic acid

Mustang

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.

 

35

Samples

0

Samples exceeding legal limit (MCL)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
20137.55 ppb21ND - 15.1 ppb
20140.150 ppb81ND - 1.20 ppb
20155.27 ppb87ND - 13.2 ppb
20163.18 ppb881.45 ppb - 5.72 ppb
20176.68 ppb885.37 ppb - 9.72 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
2012-03-071105211ND
2013-11-12125516515.1 ppb
2013-11-121255163ND
2014-02-111276878ND
2014-02-111276876ND
2014-05-131300976ND
2014-05-131300973ND
2014-08-121325558ND
2014-08-121325559ND
2014-12-034L04006-021.20 ppb
2014-12-034L04006-01ND
2015-02-255B25089-021.31 ppb
2015-02-255B25089-01ND
2015-05-135E13063-02RE113.2 ppb
2015-05-135E13063-0113.2 ppb
2015-08-055H05120-024.36 ppb
2015-08-055H05120-014.44 ppb
2015-11-185K18128-023.00 ppb
2015-11-185K18128-012.68 ppb
2016-02-106B10104-021.74 ppb
2016-02-106B10104-011.50 ppb
2016-05-116E11116-02RE13.64 ppb
2016-05-116E11116-015.72 ppb
2016-08-106H10103-022.40 ppb
2016-08-106H10103-015.24 ppb
2016-11-096K09157-011.45 ppb
2016-11-096K09157-023.73 ppb
2017-02-157B15129-026.54 ppb
2017-02-157B15129-019.72 ppb
2017-05-177E17104-025.63 ppb
2017-05-177E17104-015.37 ppb
2017-08-167H16112-028.73 ppb
2017-08-167H16112-016.51 ppb
2017-11-157K15159-025.54 ppb
2017-11-157K15159-015.42 ppb