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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Wilbraham Water Department (MWRA)

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
20140.182 ppb242ND - 2.31 ppb
2015ND80ND
2016ND80ND
2017ND80ND
2018ND80ND
2019ND80ND

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 Result
2015-02-17ND
2015-02-17ND
2015-05-21ND
2015-05-21ND
2015-08-18ND
2015-08-18ND
2015-11-17ND
2015-11-17ND
2016-02-16ND
2016-02-16ND
2016-05-17ND
2016-05-17ND
2016-08-16ND
2016-08-18ND
2016-11-14ND
2016-11-14ND
2017-02-14ND
2017-02-14ND
2017-05-16ND
2017-05-16ND
2017-08-14ND
2017-08-14ND
2017-11-13ND
2017-11-13ND
2018-02-13ND
2018-02-13ND
2018-05-15ND
2018-05-15ND
2018-08-20ND
2018-08-20ND
2018-11-13ND
2018-11-13ND
2019-02-19ND
2019-02-19ND
2019-05-20ND
2019-05-20ND
2019-08-19ND
2019-08-19ND
2019-11-18ND
2019-11-18ND