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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Sainte Genevieve

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

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND80ND
2016ND80ND
2017ND80ND
2018N/A00N/A
2019ND10ND

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
2014-01-16AC16837ND
2014-01-16AC16838ND
2014-04-28AC21744ND
2014-04-28AC21745ND
2014-08-07AC30860ND
2014-08-07AC30861ND
2014-11-24AC39340ND
2014-11-24AC39341ND
2015-01-28AC40473ND
2015-01-28AC40472ND
2015-04-27AC45113ND
2015-04-27AC45112ND
2015-07-28AC54454ND
2015-07-28AC54455ND
2015-10-26AC61282ND
2015-10-26AC61283ND
2016-01-27AC65086ND
2016-01-27AC65087ND
2016-04-25AC69445ND
2016-04-25AC69446ND
2016-07-25AC79808ND
2016-07-25AC79807ND
2016-10-27AC86353ND
2016-10-27AC86352ND
2017-01-31AC89165ND
2017-01-31AC89166ND
2017-04-25AC94522ND
2017-04-25AC94523ND
2017-07-26AD01547ND
2017-07-26AD01546ND
2017-11-20AD07955ND
2017-11-20AD07954ND
2019-07-23AD51917ND