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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

Golden State Water Company (GSWC) - San Dimas

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.

 

185

Samples

0

Samples exceeding legal limit (MCL)

146

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20123.88 ppb24241.30 ppb - 6.00 ppb
20133.55 ppb3231ND - 8.80 ppb
20142.33 ppb3322ND - 8.30 ppb
20151.71 ppb3219ND - 5.80 ppb
20162.36 ppb3225ND - 6.70 ppb
20174.06 ppb3225ND - 10.00 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
2012-04-259588-800-08502.60 ppb
2012-04-259588-801-09354.50 ppb
2012-04-259588-802-09505.60 ppb
2012-04-259588-803-09205.50 ppb
2012-04-259588-804-10156.00 ppb
2012-04-259588-805-09052.80 ppb
2012-04-259588-806-08355.50 ppb
2012-04-259588-807-08201.80 ppb
2012-07-279588-800-08555.50 ppb
2012-07-279588-801-07404.60 ppb
2012-07-279588-802-07255.40 ppb
2012-07-279588-803-08254.80 ppb
2012-07-279588-804-11105.60 ppb
2012-07-279588-805-07555.70 ppb
2012-07-279588-806-08104.90 ppb
2012-07-279588-807-10452.80 ppb
2012-10-269588-800-09101.30 ppb
2012-10-269588-801-08102.80 ppb
2012-10-269588-802-08003.20 ppb
2012-10-269588-803-08353.50 ppb
2012-10-269588-804-11152.90 ppb
2012-10-269588-805-08201.60 ppb
2012-10-269588-806-08452.70 ppb
2012-10-269588-807-10501.50 ppb
2013-01-289588-800-09404.70 ppb
2013-01-289588-801-09003.20 ppb
2013-01-289588-802-07452.60 ppb
2013-01-289588-803-09102.70 ppb
2013-01-289588-804-11403.00 ppb
2013-01-289588-805-08503.90 ppb
2013-01-289588-806-09151.90 ppb
2013-01-289588-807-11202.70 ppb
2013-04-249588-800-08403.20 ppb
2013-04-249588-801-07405.00 ppb
2013-04-249588-802-07304.40 ppb
2013-04-249588-803-0755ND
2013-04-249588-804-10304.40 ppb
2013-04-249588-805-08104.20 ppb
2013-04-249588-806-08204.50 ppb
2013-04-249588-807-10103.60 ppb
2013-07-229588-800-15102.10 ppb
2013-07-229588-801-14106.20 ppb
2013-07-229588-802-14306.70 ppb
2013-07-229588-803-13556.70 ppb
2013-07-229588-804-14556.50 ppb
2013-07-229588-805-12501.70 ppb
2013-07-229588-806-13408.80 ppb
2013-07-229588-807-13252.20 ppb
2013-10-259588-800-09052.10 ppb
2013-10-259588-801-08001.50 ppb
2013-10-259588-802-07502.10 ppb
2013-10-259588-803-08254.60 ppb
2013-10-259588-804-11101.50 ppb
2013-10-259588-805-08153.90 ppb
2013-10-259588-806-08351.70 ppb
2013-10-259588-807-10451.40 ppb
2014-01-249588-800-0850ND
2014-01-249588-801-0740ND
2014-01-249588-802-0730ND
2014-01-249588-803-0810ND
2014-01-249588-804-1045ND
2014-01-249588-805-0755ND
2014-01-249588-806-0825ND
2014-01-249588-807-1030ND
2014-04-239588-800-08251.50 ppb
2014-04-239588-801-07352.90 ppb
2014-04-239588-802-07253.60 ppb
2014-04-239588-803-07552.60 ppb
2014-04-239588-804-10053.80 ppb
2014-04-239588-805-07451.10 ppb
2014-04-239588-806-08052.50 ppb
2014-04-239588-807-0950ND
2014-07-249588-800-10552.40 ppb
2014-07-249588-801-11257.90 ppb
2014-07-249588-802-13353.80 ppb
2014-07-249588-803-11407.90 ppb
2014-07-249588-804-14007.80 ppb
2014-07-249588-805-11102.90 ppb
2014-07-249588-806-11558.30 ppb
2014-07-249588-807-12101.30 ppb
2014-10-279588-800-08451.20 ppb
2014-10-279588-801-07453.10 ppb
2014-10-279588-802-07353.00 ppb
2014-10-279588-803-08103.10 ppb
2014-10-279588-804-10452.40 ppb
2014-10-279588-805-07551.50 ppb
2014-10-279588-806-08202.40 ppb
2014-10-279588-807-1025ND
2014-11-189588-807-0940ND
2015-01-289588-800-0830ND
2015-01-289588-801-0740ND
2015-01-289588-802-0730ND
2015-01-289588-803-0800ND
2015-01-289588-804-1030ND
2015-01-289588-805-0750ND
2015-01-289588-806-0810ND
2015-01-289588-807-0955ND
2015-04-239588-800-08101.70 ppb
2015-04-239588-801-07153.50 ppb
2015-04-239588-802-07052.70 ppb
2015-04-239588-803-07353.20 ppb
2015-04-239588-804-09552.50 ppb
2015-04-239588-805-07253.80 ppb
2015-04-239588-806-0745ND
2015-04-239588-807-0940ND
2015-07-279588-800-10252.20 ppb
2015-07-279588-801-09202.70 ppb
2015-07-279588-802-09103.20 ppb
2015-07-279588-803-09452.60 ppb
2015-07-279588-804-12102.90 ppb
2015-07-279588-805-09355.80 ppb
2015-07-279588-806-10002.60 ppb
2015-07-279588-807-1150ND
2015-10-289588-800-09303.20 ppb
2015-10-289588-801-08301.10 ppb
2015-10-289588-802-08152.10 ppb
2015-10-289588-803-0855ND
2015-10-289588-804-08001.60 ppb
2015-10-289588-805-08405.60 ppb
2015-10-289588-806-09101.80 ppb
2015-10-289588-807-1055ND
2016-01-259588-800-0840ND
2016-01-259588-801-0740ND
2016-01-259588-802-07251.000 ppb
2016-01-259588-803-0810ND
2016-01-259588-804-1240ND
2016-01-259588-805-0800ND
2016-01-259588-806-0820ND
2016-01-259588-807-1220ND
2016-04-279588-800-08355.80 ppb
2016-04-279588-801-07404.30 ppb
2016-04-279588-802-07302.90 ppb
2016-04-279588-803-08053.40 ppb
2016-04-279588-804-10404.00 ppb
2016-04-279588-805-07503.20 ppb
2016-04-279588-806-08153.80 ppb
2016-04-279588-807-10156.70 ppb
2016-07-259588-800-08303.60 ppb
2016-07-259588-801-07254.10 ppb
2016-07-259588-802-07104.30 ppb
2016-07-259588-803-07501.90 ppb
2016-07-259588-804-12103.90 ppb
2016-07-259588-805-07452.80 ppb
2016-07-259588-806-08003.20 ppb
2016-07-259588-807-11403.90 ppb
2016-10-259588-800-08301.90 ppb
2016-10-259588-801-07301.60 ppb
2016-10-259588-802-07201.90 ppb
2016-10-259588-803-08001.40 ppb
2016-10-259588-804-12301.50 ppb
2016-10-259588-805-07501.10 ppb
2016-10-259588-806-08102.00 ppb
2016-10-259588-807-12051.30 ppb
2017-01-279588-800-0815ND
2017-01-279588-801-07251.70 ppb
2017-01-279588-802-07151.20 ppb
2017-01-279588-803-07451.30 ppb
2017-01-279588-804-10151.20 ppb
2017-01-279588-805-07351.50 ppb
2017-01-279588-806-07551.70 ppb
2017-01-279588-807-09551.30 ppb
2017-04-259588-800-08308.60 ppb
2017-04-259588-801-072010.00 ppb
2017-04-259588-802-07109.30 ppb
2017-04-259588-803-080010.00 ppb
2017-04-259588-804-12259.80 ppb
2017-04-259588-805-07459.50 ppb
2017-04-259588-806-081010.00 ppb
2017-04-259588-807-12009.60 ppb
2017-07-259588-800-14204.90 ppb
2017-07-259588-801-15054.10 ppb
2017-07-259588-802-15204.90 ppb
2017-07-259588-803-14504.70 ppb
2017-07-259588-804-15454.90 ppb
2017-07-259588-805-14355.20 ppb
2017-07-259588-806-14053.60 ppb
2017-07-259588-807-13554.40 ppb
2017-10-279588-800-08305.50 ppb
2017-10-279588-801-0735ND
2017-10-279588-802-0725ND
2017-10-279588-803-0800ND
2017-10-279588-804-1025ND
2017-10-279588-805-07451.000 ppb
2017-10-279588-806-0810ND
2017-10-279588-807-1010ND