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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Troy

Trichloroacetic 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

 

82

Samples

0

Samples exceeding legal limit (MCL)

39

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.775 ppb169ND - 1.80 ppb
20151.09 ppb1613ND - 1.80 ppb
2016ND160ND
20170.688 ppb168ND - 1.60 ppb
20180.775 ppb168ND - 1.90 ppb
20190.500 ppb21ND - 1.000 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic 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
2014-03-11254185021.60 ppb
2014-03-1125418501ND
2014-03-1125418503ND
2014-03-1125418504ND
2014-06-11260702011.50 ppb
2014-06-11264203011.70 ppb
2014-06-11264202011.80 ppb
2014-06-11264204011.50 ppb
2014-09-08270423011.10 ppb
2014-09-08270422011.000 ppb
2014-09-08270424011.10 ppb
2014-09-08270421011.10 ppb
2014-12-1128020301ND
2014-12-1128020101ND
2014-12-1128020001ND
2014-12-1128020201ND
2015-03-11283928011.10 ppb
2015-03-11283929011.10 ppb
2015-03-11283927011.000 ppb
2015-03-11283926011.20 ppb
2015-06-09292415011.20 ppb
2015-06-09292412011.50 ppb
2015-06-09292413011.40 ppb
2015-06-09292414011.30 ppb
2015-09-1030187101ND
2015-09-1030187201ND
2015-09-10301870011.10 ppb
2015-09-1030187301ND
2015-12-09307737011.80 ppb
2015-12-09307736011.60 ppb
2015-12-09307734011.80 ppb
2015-12-09307735011.40 ppb
2016-03-0731439601ND
2016-03-0731439701ND
2016-03-0731439401ND
2016-03-0731439501ND
2016-06-0932165601ND
2016-06-0932165301ND
2016-06-0932165401ND
2016-06-0932165501ND
2016-09-1233196201ND
2016-09-1233196101ND
2016-09-1233196301ND
2016-09-1233196001ND
2016-12-0533981501ND
2016-12-0533981701ND
2016-12-0533981401ND
2016-12-0533981601ND
2017-03-02348659011.60 ppb
2017-03-02348657011.50 ppb
2017-03-02348660011.50 ppb
2017-03-02348658011.50 ppb
2017-06-07359299011.40 ppb
2017-06-07359296011.30 ppb
2017-06-0735929701ND
2017-06-07359298011.20 ppb
2017-09-0636966201ND
2017-09-0636966301ND
2017-09-0636966001ND
2017-09-0636966101ND
2017-12-0437960601ND
2017-12-0437960701ND
2017-12-0437960801ND
2017-12-04379605011.000 ppb
2018-03-06389005011.50 ppb
2018-03-06389004011.20 ppb
2018-03-06389003011.60 ppb
2018-03-06389002011.90 ppb
2018-06-0639920701ND
2018-06-0639920801ND
2018-06-0639920901ND
2018-06-0639921001ND
2018-09-04410419011.80 ppb
2018-09-04410420011.20 ppb
2018-09-04410421011.40 ppb
2018-09-04410422011.80 ppb
2018-12-0442260801ND
2018-12-0442260901ND
2018-12-0442260701ND
2018-12-0442260601ND
2019-09-04466347011.000 ppb
2019-09-0446634601ND