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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

California Water Service Co-leona Valley

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.

 

42

Samples

0

Samples exceeding legal limit (MCL)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND80ND
20140.138 ppb81ND - 1.10 ppb
20150.138 ppb81ND - 1.10 ppb
20160.875 ppb84ND - 2.30 ppb
20173.24 ppb881.30 ppb - 5.10 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
2012-11-075810-801-1205ND
2012-11-075810-800-1220ND
2013-02-125810-801-1342ND
2013-02-125810-800-1353ND
2013-05-145810-801-1320ND
2013-05-145810-800-1333ND
2013-08-155810-801-1132ND
2013-08-155810-800-1142ND
2013-11-125810-801-1203ND
2013-11-125810-800-1156ND
2014-02-115810-801-1049ND
2014-02-115810-800-1055ND
2014-05-135810-801-1318ND
2014-05-135810-800-1326ND
2014-08-125810-801-1031ND
2014-08-125810-800-10161.10 ppb
2014-11-255810-800-1337ND
2014-11-255810-801-1330ND
2015-02-105810-801-1430ND
2015-02-105810-800-1434ND
2015-05-135810-800-11451.10 ppb
2015-05-135810-801-1136ND
2015-08-185810-800-0940ND
2015-08-185810-801-1018ND
2015-11-095810-801-1325ND
2015-11-095810-800-1343ND
2016-02-095810-801-1200ND
2016-02-095810-800-1144ND
2016-05-105810-801-10572.00 ppb
2016-05-105810-800-11032.30 ppb
2016-08-095810-801-09231.10 ppb
2016-08-095810-800-09371.60 ppb
2016-11-155810-801-1257ND
2016-11-155810-800-1317ND
2017-02-145810-801-14224.70 ppb
2017-02-145810-800-14385.10 ppb
2017-05-095810-801-10342.80 ppb
2017-05-095810-800-10543.40 ppb
2017-08-085810-800-11164.30 ppb
2017-08-085810-801-10572.90 ppb
2017-11-135810-800-13541.40 ppb
2017-11-135810-801-14131.30 ppb