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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Los Angeles County WW District 40 Reg 38 Lake Los Angeles

Monochloroacetic 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.

MORE ABOUT THIS CONTAMINANT

 

52

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND160ND
2016ND160ND
2017ND120ND
2018N/A00N/A
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic 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.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-07-095442-803-0930ND
2014-07-095442-802-1010ND
2014-07-095442-801-0915ND
2014-07-105442-800-1145ND
2014-10-085442-803-0942ND
2014-10-085442-802-1002ND
2014-10-085442-801-0934ND
2014-10-085442-800-1039ND
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
2015-07-085442-800-1106ND
2015-07-085442-803-1027ND
2015-07-085442-802-1042ND
2015-07-085442-801-1016ND
2015-10-075442-800-1145ND
2015-10-075442-801-1130ND
2015-10-075442-802-1215ND
2015-10-075442-803-1200ND
2016-01-115442-801-1215ND
2016-01-115442-800-1232ND
2016-01-115442-803-1225ND
2016-01-115442-802-1245ND
2016-04-145442-802-0914ND
2016-04-145442-800-0832ND
2016-04-145442-803-0906ND
2016-04-145442-801-0855ND
2016-07-145442-802-1130ND
2016-07-145442-800-1220ND
2016-07-145442-803-1155ND
2016-07-145442-801-1205ND
2016-10-135442-801-1159ND
2016-10-135442-802-1221ND
2016-10-135442-803-1133ND
2016-10-135442-800-1145ND
2017-01-095442-801-1457ND
2017-01-095442-803-1409ND
2017-01-095442-802-1450ND
2017-01-095442-800-1422ND
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