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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Randolph Water System

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)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.00 ppb162ND - 16.0 ppb
2015ND160ND
2016ND160ND
20170.0788 ppb164ND - 0.350 ppb
2018ND160ND
20190.0725 ppb164ND - 0.320 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
2014-01-23L0039249-02ND
2014-01-23L0039249-0116.0 ppb
2014-01-23L0039249-02ND
2014-01-23L0039249-0116.0 ppb
2014-05-291305265ND
2014-05-291305266ND
2014-05-291305266ND
2014-05-291305265ND
2014-07-141317725ND
2014-07-141317726ND
2014-07-141317726ND
2014-07-141317725ND
2014-10-071340253ND
2014-10-071340254ND
2014-10-071340254ND
2014-10-071340253ND
2015-01-191365942ND
2015-01-191365943ND
2015-01-191365943ND
2015-01-191365942ND
2015-04-141386911ND
2015-04-141386912ND
2015-04-141386912ND
2015-04-141386911ND
2015-07-141410279ND
2015-07-141410278ND
2015-07-141410279ND
2015-07-141410278ND
2015-10-061432814ND
2015-10-061432815ND
2015-10-061432815ND
2015-10-061432814ND
2016-01-121457669ND
2016-01-121457675ND
2016-01-121457675ND
2016-01-121457669ND
2016-04-121481851ND
2016-04-121481850ND
2016-04-121481851ND
2016-04-121481850ND
2016-07-121506446ND
2016-07-121506447ND
2016-07-121506447ND
2016-07-121506446ND
2016-10-181534212ND
2016-10-181534213ND
2016-10-181534213ND
2016-10-181534212ND
2017-01-1935290141016ND
2017-01-1935290141015ND
2017-01-1935290141015ND
2017-01-1935290141016ND
2017-04-1335306546003ND
2017-04-1335306546003ND
2017-04-1335306546004ND
2017-04-1335306546004ND
2017-07-0635322645004ND
2017-07-0635322645005ND
2017-07-0635322645004ND
2017-07-0635322645005ND
2017-10-05353406680020.280 ppb
2017-10-05353406680010.350 ppb
2017-10-05353406680010.350 ppb
2017-10-05353406680020.280 ppb
2018-01-1235368412002ND
2018-01-1235368412001ND
2018-01-1235368412002ND
2018-01-1235368412001ND
2018-04-1135386285002ND
2018-04-1135386285002ND
2018-04-1135386285001ND
2018-04-1135386285001ND
2018-07-2435407090002ND
2018-07-2435407090001ND
2018-07-2435407090001ND
2018-07-2435407090002ND
2018-10-1135424027001ND
2018-10-1135424027002ND
2018-10-1135424027001ND
2018-10-1135424027002ND
2019-01-0435440261002ND
2019-01-0435440261001ND
2019-01-0435440261001ND
2019-01-0435440261002ND
2019-04-1035461252002ND
2019-04-1035461252002ND
2019-04-1035461252001ND
2019-04-1035461252001ND
2019-07-2435484756002ND
2019-07-24354847560010.260 ppb
2019-07-24354847560010.260 ppb
2019-07-2435484756002ND
2019-10-1735506296001ND
2019-10-17355062960020.320 ppb
2019-10-1735506296001ND
2019-10-17355062960020.320 ppb