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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Pawc Watres

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

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND80ND
2019ND320ND

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
2018-10-0841307201ND
2018-10-0841306901ND
2018-10-0841307101ND
2018-10-0841306701ND
2018-10-0841306501ND
2018-10-0841306801ND
2018-10-0841306601ND
2018-10-0941225001ND
2019-01-0742493701ND
2019-01-0742494201ND
2019-01-0742494001ND
2019-01-0742493801ND
2019-01-0742493901ND
2019-01-0742493601ND
2019-01-0742494301ND
2019-01-0742494101ND
2019-04-0943654601ND
2019-04-0943654401ND
2019-04-0943654701ND
2019-04-0943654101ND
2019-04-0943654501ND
2019-04-0943654801ND
2019-04-0943654001ND
2019-04-0943654301ND
2019-07-0845010001ND
2019-07-0845010401ND
2019-07-0845010301ND
2019-07-0845010201ND
2019-07-0845010701ND
2019-07-0845010601ND
2019-07-0845010501ND
2019-07-0845010101ND
2019-10-0746915001ND
2019-10-0746915101ND
2019-10-0746914901ND
2019-10-0746914801ND
2019-10-0746915201ND
2019-10-0746914701ND
2019-10-0746914601ND
2019-10-0846914501ND