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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

Los Angeles County WW District 4 & 34-Lancaster

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.

 

96

Samples

0

Samples exceeding legal limit (MCL)

35

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.713 ppb194ND - 8.75 ppb
20150.393 ppb3210ND - 1.72 ppb
20161.23 ppb2914ND - 4.50 ppb
20171.07 ppb167ND - 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
2014-04-095442-806-0930ND
2014-04-095442-801-0910ND
2014-04-095442-800-0950ND
2014-07-075442-806-0835ND
2014-07-075442-800-09001.47 ppb
2014-07-085442-801-1040ND
2014-07-085442-804-0845ND
2014-07-085442-805-0800ND
2014-07-085442-807-0835ND
2014-07-085442-802-1207ND
2014-07-085442-803-0930ND
2014-10-065442-800-13188.75 ppb
2014-10-065442-806-0830ND
2014-10-075442-801-1044ND
2014-10-075442-802-1156ND
2014-10-075442-803-0940ND
2014-10-075442-807-08501.77 ppb
2014-10-075442-804-0859ND
2014-10-075442-805-08201.56 ppb
2015-01-125442-806-1331ND
2015-01-125442-800-1305ND
2015-01-135442-807-0910ND
2015-01-135442-803-0950ND
2015-01-135442-805-0830ND
2015-01-135442-802-1230ND
2015-01-135442-801-1050ND
2015-01-135442-804-0910ND
2015-04-085442-804-11431.05 ppb
2015-04-085442-803-1130ND
2015-04-085442-805-1307ND
2015-04-085442-806-1045ND
2015-04-085442-807-1151ND
2015-04-085442-800-1020ND
2015-04-085442-801-1112ND
2015-04-085442-802-1056ND
2015-07-075442-804-09451.05 ppb
2015-07-075442-802-1230ND
2015-07-075442-805-14401.72 ppb
2015-07-075442-807-1330ND
2015-07-075442-803-10001.03 ppb
2015-07-085442-806-1230ND
2015-07-155442-801-0844ND
2015-07-155442-800-1140ND
2015-10-075442-804-09071.32 ppb
2015-10-075442-803-09171.42 ppb
2015-10-075442-805-08281.41 ppb
2015-10-075442-800-13101.08 ppb
2015-10-075442-807-08501.07 ppb
2015-10-075442-802-1238ND
2015-10-075442-806-13251.44 ppb
2015-11-125442-801-1030ND
2016-01-115442-800-1235ND
2016-01-115442-806-1257ND
2016-01-135442-802-1119ND
2016-01-135442-807-0904ND
2016-01-135442-801-1053ND
2016-01-135442-804-0922ND
2016-01-135442-805-0821ND
2016-01-135442-803-1034ND
2016-04-145442-802-10451.23 ppb
2016-04-145442-807-11462.09 ppb
2016-04-145442-804-11352.82 ppb
2016-04-145442-805-12072.99 ppb
2016-04-145442-806-10234.50 ppb
2016-04-145442-800-10053.65 ppb
2016-04-145442-803-11181.18 ppb
2016-04-145442-801-11033.10 ppb
2016-07-155442-807-09012.93 ppb
2016-07-155442-801-0958ND
2016-07-155442-800-1056ND
2016-07-155442-802-10181.81 ppb
2016-07-155442-803-09361.30 ppb
2016-07-155442-804-09163.96 ppb
2016-07-155442-805-08422.89 ppb
2016-07-155442-806-11151.30 ppb
2016-10-135442-804-1203ND
2016-10-145442-802-0936ND
2016-10-145442-800-1036ND
2016-10-145442-801-0905ND
2016-10-145442-806-1011ND
2017-01-115442-803-1056ND
2017-01-115442-802-1112ND
2017-01-125442-806-1115ND
2017-01-125442-807-1038ND
2017-01-125442-805-1020ND
2017-01-125442-804-1051ND
2017-01-255442-801-10202.78 ppb
2017-01-255442-800-12452.32 ppb
2017-07-109588-806-11121.30 ppb
2017-07-109588-801-0904ND
2017-07-109588-803-09491.90 ppb
2017-07-109588-800-0802ND
2017-07-109588-805-10155.10 ppb
2017-07-109588-807-09261.60 ppb
2017-07-109588-804-10122.10 ppb
2017-07-109588-802-0833ND