Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Monochloroacetic acid

Los Angeles County Waterworks District 36-Val Verde

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.

 

24

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
2017ND40ND

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
2014-07-085442-801-0825ND
2014-07-085442-800-0930ND
2014-10-065442-801-0950ND
2014-10-065442-800-1040ND
2015-01-145442-800-0915ND
2015-01-145442-801-1012ND
2015-04-095442-800-0831ND
2015-04-095442-801-0908ND
2015-07-085442-801-0830ND
2015-07-085442-800-0945ND
2015-10-065442-801-0820ND
2015-10-065442-800-0930ND
2016-01-135442-801-0925ND
2016-01-135442-800-1015ND
2016-04-115442-801-1030ND
2016-04-115442-800-1125ND
2016-07-125442-800-1305ND
2016-07-125442-801-1215ND
2016-10-135442-800-1145ND
2016-10-135442-801-1050ND
2017-01-105442-800-1220ND
2017-01-105442-801-1154ND
2017-07-109588-800-0900ND
2017-07-109588-801-0950ND