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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

University of New Mexico

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

 

71

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0175 ppb41ND - 0.0700 ppb
20150.106 ppb75ND - 0.240 ppb
20160.130 ppb164ND - 0.670 ppb
2017ND160ND
2018ND120ND
2019ND160ND

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
2014-01-1720140017140.0700 ppb
2014-04-152014012256ND
2014-07-152014022282ND
2014-10-162014032609ND
2015-01-1320150013710.0400 ppb
2015-04-132015011311ND
2015-07-132015020012ND
2015-10-1320150307550.190 ppb
2015-10-1320150307580.120 ppb
2015-10-1320150307570.150 ppb
2015-10-1320150307560.240 ppb
2016-01-1120160008730.670 ppb
2016-01-1120160008740.650 ppb
2016-01-1120160008710.610 ppb
2016-01-1120160008720.150 ppb
2016-04-192016011057ND
2016-04-192016011058ND
2016-04-192016011059ND
2016-04-192016011060ND
2016-07-132016020055ND
2016-07-132016020056ND
2016-07-132016020057ND
2016-07-132016020058ND
2016-10-172016030073ND
2016-10-172016030074ND
2016-10-172016030075ND
2016-10-172016030076ND
2017-01-102017000735ND
2017-01-102017000733ND
2017-01-102017000734ND
2017-01-102017000736ND
2017-04-052017009776ND
2017-04-052017009777ND
2017-04-052017009778ND
2017-04-052017009779ND
2017-07-112017019662ND
2017-07-112017019661ND
2017-07-112017019664ND
2017-07-112017019663ND
2017-10-102017029146ND
2017-10-102017029145ND
2017-10-102017029144ND
2017-10-102017029143ND
2018-04-042018009641ND
2018-04-042018009640ND
2018-04-042018009639ND
2018-04-042018009638ND
2018-07-092018018568ND
2018-07-092018018565ND
2018-07-092018018566ND
2018-07-092018018567ND
2018-10-012018028078ND
2018-10-012018028079ND
2018-10-012018028080ND
2018-10-012018028081ND
2019-01-102019000766ND
2019-01-102019000767ND
2019-01-102019000768ND
2019-01-102019000769ND
2019-04-042019008474ND
2019-04-042019008475ND
2019-04-042019008476ND
2019-04-042019008477ND
2019-07-022019018102ND
2019-07-022019018104ND
2019-07-022019018103ND
2019-07-022019018101ND
2019-10-022019028147ND
2019-10-022019028146ND
2019-10-022019028145ND
2019-10-022019028144ND