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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

ISU

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)

28

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
20150.140 ppb163ND - 1.08 ppb
20160.116 ppb163ND - 0.800 ppb
20170.190 ppb164ND - 0.820 ppb
20180.731 ppb1612ND - 2.04 ppb
20190.227 ppb166ND - 1.07 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
2014-01-152029501ND
2014-01-152029502ND
2014-01-152029503ND
2014-01-152029500ND
2014-04-172047131ND
2014-04-172047132ND
2014-04-172047133ND
2014-04-172047134ND
2014-07-032062948ND
2014-07-032062949ND
2014-07-032062950ND
2014-07-032062951ND
2014-10-062086334ND
2014-10-062086336ND
2014-10-062086335ND
2014-10-062086333ND
2015-01-141A50829-01ND
2015-01-141A50829-02ND
2015-01-141A50829-03ND
2015-01-141A50829-04ND
2015-04-231D51721-01ND
2015-04-231D51721-02ND
2015-04-231D51721-03ND
2015-04-231D51721-04ND
2015-07-201G51543-02ND
2015-07-201G51543-04ND
2015-07-201G51543-03ND
2015-07-201G51543-01ND
2015-10-291J52368-020.580 ppb
2015-10-291J52368-030.580 ppb
2015-10-291J52368-041.08 ppb
2015-10-291J52368-01ND
2016-01-061A60445-01ND
2016-01-061A60445-02ND
2016-01-061A60445-03ND
2016-01-061A60445-04ND
2016-04-261D62097-03ND
2016-04-261D62097-04ND
2016-04-261D62097-02ND
2016-04-261D62097-010.800 ppb
2016-07-111G60644-010.540 ppb
2016-07-111G60644-02ND
2016-07-111G60644-03ND
2016-07-111G60644-040.520 ppb
2016-10-101J60627-01ND
2016-10-101J60627-02ND
2016-10-101J60627-03ND
2016-10-101J60627-04ND
2017-01-111A70699-010.810 ppb
2017-01-111A70699-020.660 ppb
2017-01-111A70699-030.820 ppb
2017-01-111A70699-040.750 ppb
2017-04-121D70895-01ND
2017-04-121D70895-02ND
2017-04-121D70895-03ND
2017-04-121D70895-04ND
2017-07-171G71164-04ND
2017-07-171G71164-03ND
2017-07-171G71164-02ND
2017-07-171G71164-01ND
2017-10-131J71139-02ND
2017-10-131J71139-03ND
2017-10-131J71139-04ND
2017-10-131J71139-01ND
2018-01-161A81016-040.800 ppb
2018-01-161A81016-030.530 ppb
2018-01-161A81016-020.630 ppb
2018-01-161A81016-010.620 ppb
2018-04-091D80632-041.58 ppb
2018-04-091D80632-012.04 ppb
2018-04-091D80632-021.92 ppb
2018-04-091D80632-031.40 ppb
2018-07-111G80837-04ND
2018-07-111G80837-03ND
2018-07-111G80837-020.485 ppb
2018-07-111G80837-010.468 ppb
2018-10-031J80340-010.470 ppb
2018-10-031J80340-020.760 ppb
2018-10-031J80340-03ND
2018-10-031J80340-04ND
2019-01-141A91020-010.510 ppb
2019-01-141A91020-020.600 ppb
2019-01-141A91020-030.640 ppb
2019-01-141A91020-041.07 ppb
2019-04-011D90091-01ND
2019-04-011D90091-04ND
2019-04-011D90091-03ND
2019-04-011D90091-02ND
2019-07-101G90873-02ND
2019-07-101G90873-04ND
2019-07-101G90873-03ND
2019-07-101G90873-01ND
2019-10-161J91484-04ND
2019-10-161J91484-030.340 ppb
2019-10-161J91484-020.468 ppb
2019-10-161J91484-01ND