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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

Los Angeles County Waterworks District 37-Acton

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND40ND
2015ND80ND
2016ND80ND
2017ND60ND

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
2014-07-075442-801-0900ND
2014-07-075442-800-0850ND
2014-10-065442-801-0847ND
2014-10-065442-800-0836ND
2015-01-145442-800-0845ND
2015-01-145442-801-0830ND
2015-04-065442-800-0806ND
2015-04-065442-801-0814ND
2015-07-085442-800-0951ND
2015-07-085442-801-1003ND
2015-10-075442-800-0930ND
2015-10-075442-801-0900ND
2016-01-115442-800-0930ND
2016-01-115442-801-0943ND
2016-04-115442-800-0915ND
2016-04-115442-801-0933ND
2016-07-145442-801-1012ND
2016-07-145442-800-0955ND
2016-10-135442-801-1036ND
2016-10-135442-800-1042ND
2017-01-095442-800-1152ND
2017-01-095442-801-1200ND
2017-04-139590-801-0840ND
2017-04-139590-800-0750ND
2017-07-109588-801-0810ND
2017-07-109588-800-0755ND