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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

Golden State Water Company (GSWC) - Culver City

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.

 

92

Samples

0

Samples exceeding legal limit (MCL)

59

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.458 ppb123ND - 2.20 ppb
20134.27 ppb1614ND - 7.60 ppb
20144.72 ppb16162.80 ppb - 7.20 ppb
20152.94 ppb1614ND - 6.10 ppb
20162.87 ppb1612ND - 6.10 ppb
2017ND160ND

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
2012-05-012706-800-1033ND
2012-05-012706-801-1132ND
2012-05-012706-802-1021ND
2012-05-012706-803-1001ND
2012-08-062706-801-1149ND
2012-08-062706-802-0957ND
2012-08-062706-800-1037ND
2012-08-062706-803-0930ND
2012-11-052706-802-09581.60 ppb
2012-11-052706-801-11032.20 ppb
2012-11-052706-800-0915ND
2012-11-052706-803-09391.70 ppb
2013-02-122706-803-09302.10 ppb
2013-02-122706-800-09003.50 ppb
2013-02-122706-801-1046ND
2013-02-122706-802-09562.20 ppb
2013-05-132706-800-09245.50 ppb
2013-05-132706-801-10316.80 ppb
2013-05-132706-802-09076.40 ppb
2013-05-132706-803-08556.80 ppb
2013-08-052706-802-10097.60 ppb
2013-08-052706-800-09316.00 ppb
2013-08-052706-803-09546.00 ppb
2013-08-052706-801-10587.10 ppb
2013-11-052706-802-10122.60 ppb
2013-11-052706-800-1030ND
2013-11-052706-801-11463.00 ppb
2013-11-052706-803-09492.70 ppb
2014-02-032706-802-10235.10 ppb
2014-02-032706-801-11163.80 ppb
2014-02-032706-803-10034.30 ppb
2014-02-032706-800-09303.90 ppb
2014-05-052706-801-10544.60 ppb
2014-05-052706-800-08445.10 ppb
2014-05-052706-803-09335.10 ppb
2014-05-052706-802-09565.90 ppb
2014-08-042706-803-09155.80 ppb
2014-08-042706-800-08356.50 ppb
2014-08-042706-802-09475.60 ppb
2014-08-042706-801-10597.20 ppb
2014-11-032706-802-10532.80 ppb
2014-11-032706-803-10213.60 ppb
2014-11-032706-800-09212.80 ppb
2014-11-032706-801-10583.40 ppb
2015-02-032706-802-09282.40 ppb
2015-02-032706-803-09012.10 ppb
2015-02-032706-801-09583.20 ppb
2015-02-032706-800-08292.90 ppb
2015-05-052706-800-07236.10 ppb
2015-05-052706-801-09214.60 ppb
2015-05-052706-802-08175.80 ppb
2015-05-052706-803-07534.60 ppb
2015-08-040007-800-08553.40 ppb
2015-08-040007-801-1140ND
2015-08-040007-802-09151.40 ppb
2015-08-040007-803-0845ND
2015-11-092706-803-09551.90 ppb
2015-11-092706-800-08231.40 ppb
2015-11-092706-801-13323.90 ppb
2015-11-092706-802-11283.40 ppb
2016-02-012706-802-12413.40 ppb
2016-02-012706-803-12572.80 ppb
2016-02-012706-801-11412.60 ppb
2016-02-012706-800-11052.60 ppb
2016-05-022706-802-11382.80 ppb
2016-05-022706-800-12454.40 ppb
2016-05-022706-803-12043.20 ppb
2016-05-022706-801-10293.10 ppb
2016-08-012706-800-11554.30 ppb
2016-08-012706-802-11415.10 ppb
2016-08-012706-803-12516.10 ppb
2016-08-012706-801-10405.50 ppb
2016-11-082706-802-1144ND
2016-11-082706-803-1127ND
2016-11-082706-800-1101ND
2016-11-082706-801-1210ND
2017-02-089590-801-1114ND
2017-02-089590-800-0930ND
2017-02-089590-803-1229ND
2017-02-089590-802-1211ND
2017-05-019590-801-1132ND
2017-05-019590-803-0955ND
2017-05-019590-800-0920ND
2017-05-019590-802-1030ND
2017-08-079590-801-0940ND
2017-08-079590-803-1130ND
2017-08-079590-800-0835ND
2017-08-079590-802-1105ND
2017-11-069590-800-0923ND
2017-11-069590-801-1302ND
2017-11-069590-802-1218ND
2017-11-069590-803-1148ND