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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Red Hill Waterworks Inc.

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)

60

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
201613.5 ppb1612ND - 21.2 ppb
201716.5 ppb161612.7 ppb - 27.1 ppb
201810.3 ppb16162.80 ppb - 16.7 ppb
201916.0 ppb16169.60 ppb - 25.2 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
2014-02-211279941ND
2014-02-211279940ND
2014-02-211279941ND
2014-02-211279940ND
2014-05-281304855ND
2014-05-281304856ND
2014-05-281304856ND
2014-05-281304855ND
2014-08-201328030ND
2014-08-201328031ND
2014-08-201328031ND
2014-08-201328030ND
2014-11-121349679ND
2014-11-121349680ND
2014-11-121349680ND
2014-11-121349679ND
2015-02-181373491ND
2015-02-181373492ND
2015-02-181373492ND
2015-02-181373491ND
2015-05-131394755ND
2015-05-131394756ND
2015-05-131394756ND
2015-05-131394755ND
2015-08-121418405ND
2015-08-121418404ND
2015-08-121418405ND
2015-08-121418404ND
2015-11-111443224ND
2015-11-111443225ND
2015-11-111443225ND
2015-11-111443224ND
2016-02-231469565ND
2016-02-231469566ND
2016-02-231469566ND
2016-02-231469565ND
2016-05-24149381221.2 ppb
2016-05-24149381114.7 ppb
2016-05-24149381221.2 ppb
2016-05-24149381114.7 ppb
2016-08-15151639219.0 ppb
2016-08-15151639319.7 ppb
2016-08-15151639319.7 ppb
2016-08-15151639219.0 ppb
2016-11-14154172415.2 ppb
2016-11-14154172518.5 ppb
2016-11-14154172518.5 ppb
2016-11-14154172415.2 ppb
2017-02-223529719300415.5 ppb
2017-02-223529719300312.7 ppb
2017-02-223529719300312.7 ppb
2017-02-223529719300415.5 ppb
2017-05-153531261200313.4 ppb
2017-05-153531261200313.4 ppb
2017-05-153531261200414.3 ppb
2017-05-153531261200414.3 ppb
2017-08-093532968700727.1 ppb
2017-08-093532968700815.7 ppb
2017-08-093532968700727.1 ppb
2017-08-093532968700815.7 ppb
2017-11-143534835400214.8 ppb
2017-11-143534835400118.5 ppb
2017-11-143534835400118.5 ppb
2017-11-143534835400214.8 ppb
2018-02-05353732660026.50 ppb
2018-02-053537326600116.7 ppb
2018-02-05353732660026.50 ppb
2018-02-053537326600116.7 ppb
2018-05-083539149500212.2 ppb
2018-05-083539149500212.2 ppb
2018-05-08353914950012.80 ppb
2018-05-08353914950012.80 ppb
2018-08-01354082490029.30 ppb
2018-08-013540824900113.7 ppb
2018-08-013540824900113.7 ppb
2018-08-01354082490029.30 ppb
2018-11-28354340480019.30 ppb
2018-11-283543404800212.1 ppb
2018-11-28354340480019.30 ppb
2018-11-283543404800212.1 ppb
2019-02-053544675700210.3 ppb
2019-02-05354467570019.60 ppb
2019-02-05354467570019.60 ppb
2019-02-053544675700210.3 ppb
2019-05-223547049500211.1 ppb
2019-05-223547049500211.1 ppb
2019-05-223547049500119.7 ppb
2019-05-223547049500119.7 ppb
2019-08-273549417900220.6 ppb
2019-08-273549417900125.2 ppb
2019-08-273549417900125.2 ppb
2019-08-273549417900220.6 ppb
2019-11-133551267300116.9 ppb
2019-11-133551267300214.9 ppb
2019-11-133551267300116.9 ppb
2019-11-133551267300214.9 ppb