Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Trichloroacetic acid

Cal/Am Water Company - San Marino

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)

23

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.30 ppb168ND - 4.40 ppb
20150.856 ppb165ND - 3.90 ppb
20161.31 ppb167ND - 5.70 ppb
20170.156 ppb161ND - 2.50 ppb
20180.0875 ppb161ND - 1.40 ppb
20190.0688 ppb161ND - 1.10 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
2014-02-219588-802-0835ND
2014-02-219588-800-09051.20 ppb
2014-02-219588-801-0920ND
2014-02-219588-803-0850ND
2014-05-239588-803-09104.40 ppb
2014-05-239588-802-08554.20 ppb
2014-05-239588-801-09401.20 ppb
2014-05-239588-800-09252.90 ppb
2014-08-229588-803-08553.80 ppb
2014-08-229588-802-08401.20 ppb
2014-08-229588-801-0925ND
2014-08-229588-800-09101.90 ppb
2014-11-219588-802-0815ND
2014-11-219588-801-0900ND
2014-11-219588-803-0830ND
2014-11-219588-800-0845ND
2015-02-259588-803-1455ND
2015-02-259588-802-1435ND
2015-02-259588-801-1540ND
2015-02-259588-800-1520ND
2015-05-269588-803-1030ND
2015-05-269588-802-1015ND
2015-05-269588-800-1045ND
2015-05-269588-801-1105ND
2015-08-249588-800-08553.90 ppb
2015-08-249588-803-0840ND
2015-08-249588-802-0830ND
2015-08-249588-801-0905ND
2015-11-239588-801-09002.40 ppb
2015-11-239588-800-08451.70 ppb
2015-11-239588-803-08302.80 ppb
2015-11-239588-802-08152.90 ppb
2016-02-229588-801-0920ND
2016-02-229588-800-0930ND
2016-02-229588-803-0945ND
2016-02-229588-802-1000ND
2016-05-239588-801-0915ND
2016-05-239588-800-0905ND
2016-05-239588-803-0850ND
2016-05-239588-802-0840ND
2016-08-229588-803-09005.60 ppb
2016-08-229588-801-0925ND
2016-08-229588-800-09102.00 ppb
2016-08-229588-802-08455.70 ppb
2016-11-219588-803-09401.90 ppb
2016-11-219588-801-09151.70 ppb
2016-11-219588-802-09502.00 ppb
2016-11-219588-800-09302.00 ppb
2017-02-249588-802-0950ND
2017-02-249588-803-1000ND
2017-02-249588-801-1030ND
2017-02-249588-800-1015ND
2017-05-229588-802-1005ND
2017-05-229588-800-1030ND
2017-05-229588-801-1040ND
2017-05-229588-803-1020ND
2017-08-229588-800-08552.50 ppb
2017-08-229588-801-0905ND
2017-08-229588-803-0840ND
2017-08-229588-802-0830ND
2017-11-219588-803-0815ND
2017-11-219588-800-0835ND
2017-11-219588-802-0800ND
2017-11-219588-801-0855ND
2018-02-209588-803-0950ND
2018-02-209588-800-1005ND
2018-02-209588-801-1020ND
2018-02-209588-802-0940ND
2018-05-229588-801-0850ND
2018-05-229588-802-0810ND
2018-05-229588-803-0820ND
2018-05-229588-800-0835ND
2018-08-279588-801-0915ND
2018-08-279588-803-0940ND
2018-08-279588-802-0955ND
2018-08-279588-800-09301.40 ppb
2018-11-269588-801-1120ND
2018-11-269588-803-1055ND
2018-11-269588-802-1040ND
2018-11-269588-800-1105ND
2019-02-229588-800-1120ND
2019-02-229588-802-1140ND
2019-02-229588-801-1110ND
2019-02-229588-803-1130ND
2019-05-249588-800-1115ND
2019-05-249588-802-1045ND
2019-05-249588-803-1100ND
2019-05-249588-801-1130ND
2019-08-269588-803-0955ND
2019-08-269588-802-09451.10 ppb
2019-08-269588-800-1005ND
2019-08-269588-801-1025ND
2019-11-219588-803-1035ND
2019-11-219588-802-1020ND
2019-11-219588-800-1050ND
2019-11-219588-801-1110ND