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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

Festus

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.

 

34

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
2013ND20ND
2014ND80ND
2015ND80ND
2016ND80ND
2017ND80ND

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
2013-11-25AC14192ND
2013-12-10AC16334ND
2014-02-20AC18222ND
2014-02-20AC18223ND
2014-05-22AC23230ND
2014-05-22AC23231ND
2014-09-08AC33448ND
2014-09-08AC33449ND
2014-11-24AC38279ND
2014-11-24AC38278ND
2015-02-23AC42006ND
2015-02-23AC42005ND
2015-05-26AC46569ND
2015-05-26AC46570ND
2015-09-02AC57550ND
2015-09-02AC57549ND
2015-11-30AC62836ND
2015-11-30AC62835ND
2016-02-29AC66382ND
2016-02-29AC66381ND
2016-05-25AC72075ND
2016-05-25AC72076ND
2016-08-24AC81709ND
2016-08-24AC81710ND
2016-11-02AC86975ND
2016-11-02AC86974ND
2017-02-23AC90825ND
2017-02-23AC90824ND
2017-05-31AC98224ND
2017-05-31AC98223ND
2017-08-31AD03553ND
2017-08-31AD03552ND
2017-11-27AD09515ND
2017-11-27AD09514ND