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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

Penn State Univ.

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND40ND
20140.0694 ppb161ND - 1.11 ppb
2015ND20ND
2016ND40ND
2017ND20ND

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
2013-11-133K13069-04ND
2013-11-133K13069-01ND
2013-11-133K13069-02ND
2013-11-133K13069-03ND
2014-02-134B13064-01ND
2014-02-134B13064-03ND
2014-02-134B13064-02ND
2014-02-134B13064-04ND
2014-05-154E15061-02ND
2014-05-154E15061-03ND
2014-05-154E15061-01ND
2014-05-154E15061-04ND
2014-08-144H14120-02ND
2014-08-144H14120-03ND
2014-08-144H14120-04ND
2014-08-144H14120-01ND
2014-11-134K13101-03ND
2014-11-134K13101-04ND
2014-11-134K13101-011.11 ppb
2014-11-134K13101-02ND
2015-02-1212446991ND
2015-08-1313185096ND
2016-02-2513917127ND
2016-08-2514804549ND
2016-09-0214975542ND
2016-11-2315282665ND
2017-08-2416629490ND
2017-11-2217077346ND