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EWG's Tap Water Database — 2019 UPDATE

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Dichloroacetic acid

Los Angeles County WW District 40 Reg 38 Lake Los Angeles

Dichloroacetic 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.

 

52

Samples

0

Samples exceeding legal limit (MCL)

22

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20141.38 ppb85ND - 2.94 ppb
20152.01 ppb168ND - 7.42 ppb
20161.96 ppb168ND - 8.27 ppb
20170.138 ppb121ND - 1.65 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic 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
2014-07-095442-803-0930ND
2014-07-095442-802-10101.57 ppb
2014-07-095442-801-0915ND
2014-07-105442-800-11451.95 ppb
2014-10-085442-803-09422.07 ppb
2014-10-085442-802-10022.94 ppb
2014-10-085442-801-0934ND
2014-10-085442-800-10392.53 ppb
2015-01-145442-800-1035ND
2015-01-145442-801-1045ND
2015-01-145442-803-1100ND
2015-01-145442-802-1115ND
2015-04-085442-800-0955ND
2015-04-085442-803-0935ND
2015-04-085442-802-0945ND
2015-04-085442-801-0925ND
2015-07-085442-800-11065.16 ppb
2015-07-085442-803-10273.37 ppb
2015-07-085442-802-10423.41 ppb
2015-07-085442-801-10163.87 ppb
2015-10-075442-800-11457.42 ppb
2015-10-075442-801-11303.90 ppb
2015-10-075442-802-12152.99 ppb
2015-10-075442-803-12002.04 ppb
2016-01-115442-801-1215ND
2016-01-115442-800-12321.22 ppb
2016-01-115442-803-1225ND
2016-01-115442-802-1245ND
2016-04-145442-802-09143.47 ppb
2016-04-145442-800-08326.85 ppb
2016-04-145442-803-09065.92 ppb
2016-04-145442-801-08558.27 ppb
2016-07-145442-802-11303.26 ppb
2016-07-145442-800-1220ND
2016-07-145442-803-1155ND
2016-07-145442-801-1205ND
2016-10-135442-801-11591.35 ppb
2016-10-135442-802-1221ND
2016-10-135442-803-1133ND
2016-10-135442-800-11451.02 ppb
2017-01-095442-801-1457ND
2017-01-095442-803-1409ND
2017-01-095442-802-1450ND
2017-01-095442-800-14221.65 ppb
2017-04-209590-801-1055ND
2017-04-209590-800-1030ND
2017-04-209590-803-1112ND
2017-04-209590-802-1128ND
2017-07-179588-803-0953ND
2017-07-179588-802-1123ND
2017-07-179588-801-0943ND
2017-07-179588-800-1047ND