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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

University Park

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

57

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.875 ppb1611ND - 1.50 ppb
20151.14 ppb1612ND - 2.30 ppb
20160.844 ppb1610ND - 1.60 ppb
20170.431 ppb165ND - 1.50 ppb
20181.01 ppb1614ND - 1.40 ppb
20190.656 ppb165ND - 2.50 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
2014-02-28Q14067960041.50 ppb
2014-02-28Q14067960031.50 ppb
2014-02-28Q14067960021.30 ppb
2014-02-28Q14067960011.20 ppb
2014-04-15Q14121680041.30 ppb
2014-04-15Q14121680031.30 ppb
2014-04-15Q14121680021.40 ppb
2014-04-15Q14121680011.30 ppb
2014-07-03Q1425909002ND
2014-07-03Q1425909001ND
2014-07-03Q1425909003ND
2014-07-03Q1425909004ND
2014-11-05Q14548570051.000 ppb
2014-11-05Q14548570041.10 ppb
2014-11-05Q14548570031.10 ppb
2014-11-05Q1454857002ND
2015-01-26Q15026720051.20 ppb
2015-01-26Q15026720041.20 ppb
2015-01-26Q15026720031.20 ppb
2015-01-26Q15026720021.10 ppb
2015-06-09Q15210450011.50 ppb
2015-06-09Q15210450021.60 ppb
2015-06-09Q15210450041.50 ppb
2015-06-09Q15210450031.60 ppb
2015-09-04Q1534743004ND
2015-09-04Q1534743001ND
2015-09-04Q1534743003ND
2015-09-04Q1534743002ND
2015-12-08Q15487920041.50 ppb
2015-12-08Q15487920031.40 ppb
2015-12-08Q15487920022.10 ppb
2015-12-08Q15487920012.30 ppb
2016-02-03Q16049480021.40 ppb
2016-02-03Q16049480011.60 ppb
2016-02-03Q16049480031.40 ppb
2016-02-03Q16049480041.50 ppb
2016-04-27Q1616640004ND
2016-04-27Q1616640003ND
2016-04-27Q1616640002ND
2016-04-27Q1616640001ND
2016-08-02Q16321000041.40 ppb
2016-08-02Q16321000031.40 ppb
2016-08-02Q16321000021.20 ppb
2016-08-02Q16321000011.40 ppb
2016-11-02Q16470170021.10 ppb
2016-11-02Q16470170031.10 ppb
2016-11-02Q1647017001ND
2016-11-02Q1647017004ND
2017-01-24Q17032960021.50 ppb
2017-01-24Q17032960041.50 ppb
2017-01-24Q17032960011.50 ppb
2017-01-24Q17032960031.40 ppb
2017-04-12Q1715263004ND
2017-04-12Q1715263003ND
2017-04-12Q1715263002ND
2017-04-12Q1715263001ND
2017-07-26Q1730808003ND
2017-07-26Q1730808001ND
2017-07-26Q1730808002ND
2017-07-26Q1730808004ND
2017-11-10Q17579640021.000 ppb
2017-11-10Q1757964004ND
2017-11-10Q1757964001ND
2017-11-10Q1757964003ND
2018-02-07Q18050970051.000 ppb
2018-02-07Q18050970041.000 ppb
2018-02-07Q18050970031.000 ppb
2018-02-07Q18050970021.000 ppb
2018-05-02Q18178050041.10 ppb
2018-05-02Q18178050011.10 ppb
2018-05-02Q1817805002ND
2018-05-02Q18178050031.10 ppb
2018-08-13Q18322380041.000 ppb
2018-08-13Q18322380011.40 ppb
2018-08-13Q18322380031.10 ppb
2018-08-13Q1832238002ND
2018-11-08Q18448820041.40 ppb
2018-11-08Q18448820021.20 ppb
2018-11-08Q18448820031.30 ppb
2018-11-08Q18448820011.40 ppb
2019-01-24Q1903747002ND
2019-01-24Q1903747004ND
2019-01-24Q1903747005ND
2019-01-24Q1903747003ND
2019-04-17Q1915786003ND
2019-04-17Q1915786002ND
2019-04-17Q1915786004ND
2019-04-17Q19157860011.000 ppb
2019-09-05Q1962655004ND
2019-09-05Q1962655003ND
2019-09-05Q1962655002ND
2019-09-05Q1962655001ND
2019-11-07Q19761330012.40 ppb
2019-11-07Q19761330042.40 ppb
2019-11-07Q19761330032.50 ppb
2019-11-07Q19761330022.20 ppb