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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Wauwatosa Waterworks

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
20150.181 ppb162ND - 1.60 ppb
2016ND160ND
2017ND160ND
2018ND160ND
2019ND160ND

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
2014-03-07773813ND
2014-03-07773810ND
2014-03-07773811ND
2014-03-07773812ND
2014-06-04794536ND
2014-06-04794535ND
2014-06-04794537ND
2014-06-04794538ND
2014-09-04815801ND
2014-09-04815800ND
2014-09-04815802ND
2014-09-04815803ND
2014-12-03834239ND
2014-12-03834240ND
2014-12-03834242ND
2014-12-03834241ND
2015-03-05846589ND
2015-03-05846587ND
2015-03-058465901.30 ppb
2015-03-058465881.60 ppb
2015-06-03863419ND
2015-06-03863418ND
2015-06-03863416ND
2015-06-03863417ND
2015-09-02880652ND
2015-09-02880651ND
2015-09-02880650ND
2015-09-02880653ND
2015-12-03896441ND
2015-12-03896440ND
2015-12-03896439ND
2015-12-03896438ND
2016-03-03908101ND
2016-03-03908104ND
2016-03-03908102ND
2016-03-03908103ND
2016-06-02924483ND
2016-06-02924484ND
2016-06-02924482ND
2016-06-02924485ND
2016-09-01942877ND
2016-09-01942880ND
2016-09-01942878ND
2016-09-01942879ND
2016-12-01962740ND
2016-12-01962738ND
2016-12-01962739ND
2016-12-01962737ND
2017-03-02975857ND
2017-03-02975858ND
2017-03-02975855ND
2017-03-02975856ND
2017-06-01994972ND
2017-06-01994971ND
2017-06-01994973ND
2017-06-01994970ND
2017-08-291014809ND
2017-08-291014811ND
2017-08-291014810ND
2017-08-291014812ND
2017-11-291031386ND
2017-11-291031385ND
2017-11-291031388ND
2017-11-291031387ND
2018-03-051043461ND
2018-03-051043463ND
2018-03-051043462ND
2018-03-051043460ND
2018-06-051059175ND
2018-06-051059173ND
2018-06-051059174ND
2018-06-051059176ND
2018-09-051078442ND
2018-09-051078443ND
2018-09-051078445ND
2018-09-051078444ND
2018-11-271094402ND
2018-11-271094403ND
2018-11-271094400ND
2018-11-271094401ND
2019-03-051108020ND
2019-03-051108021ND
2019-03-051108023ND
2019-03-051108022ND
2019-06-051125650ND
2019-06-051125647ND
2019-06-051125648ND
2019-06-051125649ND
2019-09-051145697ND
2019-09-051145694ND
2019-09-051145695ND
2019-09-051145696ND
2019-12-021162872ND
2019-12-021162873ND
2019-12-021162875ND
2019-12-021162874ND