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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Military Highway WSC - Progreso

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)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
20160.888 ppb165ND - 4.20 ppb
20170.231 ppb161ND - 3.70 ppb
20180.667 ppb62ND - 2.90 ppb
20190.669 ppb164ND - 3.80 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
2014-03-19AC47710ND
2014-03-19AC47707ND
2014-03-19AC47704ND
2014-03-19AC47712ND
2014-06-03AC55882ND
2014-06-03AC55862ND
2014-06-03AC55843ND
2014-06-03AC55844ND
2014-09-23AC67843ND
2014-09-23AC67837ND
2014-09-23AC67836ND
2014-09-23AC67886ND
2014-10-22AC70321ND
2014-10-22AC70305ND
2014-10-22AC70306ND
2014-10-22AC70307ND
2015-03-12AC84068ND
2015-03-12AC84055ND
2015-03-12AC84064ND
2015-03-12AC84053ND
2015-05-07AC90965ND
2015-05-07AC90970ND
2015-05-07AC90971ND
2015-05-07AC90968ND
2015-08-04AD02297ND
2015-08-04AD02301ND
2015-08-04AD02295ND
2015-08-04AD02299ND
2015-11-17AD13798ND
2015-11-17AD13801ND
2015-11-17AD13814ND
2015-11-17AD13799ND
2016-03-03AD268771.40 ppb
2016-03-03AD26872ND
2016-03-03AD268713.10 ppb
2016-03-03AD26876ND
2016-06-09AD399892.50 ppb
2016-06-09AD39998ND
2016-06-09AD39994ND
2016-06-09AD39997ND
2016-08-04AD47080ND
2016-08-04AD470853.00 ppb
2016-08-04AD47079ND
2016-08-04AD47081ND
2016-10-26AD547894.20 ppb
2016-10-26AD54795ND
2016-10-26AD54785ND
2016-10-26AD54790ND
2017-02-28AD72417ND
2017-02-28AD72406ND
2017-02-28AD72415ND
2017-02-28AD724083.70 ppb
2017-05-02AD82150ND
2017-05-02AD82155ND
2017-05-02AD82152ND
2017-05-02AD82154ND
2017-08-15AD93021ND
2017-08-15AD93019ND
2017-08-15AD93003ND
2017-08-15AD93002ND
2017-10-04AD99255ND
2017-10-04AD99257ND
2017-10-04AD99254ND
2017-10-04AD99253ND
2018-05-16AE265591.10 ppb
2018-05-16AE26556ND
2018-11-08AE457382.90 ppb
2018-11-08AE45749ND
2018-11-08AE45745ND
2018-11-08AE45747ND
2019-02-28AE56499ND
2019-02-28AE56498ND
2019-02-28AE56501ND
2019-02-28AE564972.50 ppb
2019-06-05AE692063.80 ppb
2019-06-05AE69222ND
2019-06-05AE69211ND
2019-06-05AE69210ND
2019-08-21AE798122.40 ppb
2019-08-21AE79827ND
2019-08-21AE79809ND
2019-08-21AE79811ND
2019-11-06AE88647ND
2019-11-06AE886462.00 ppb
2019-11-06AE88648ND
2019-11-06AE88642ND