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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

Penn State Univ.

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.

 

28

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
2013ND40ND
2014ND160ND
2015ND20ND
2016ND40ND
2017ND20ND

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
2013-11-133K13069-04ND
2013-11-133K13069-01ND
2013-11-133K13069-02ND
2013-11-133K13069-03ND
2014-02-134B13064-01ND
2014-02-134B13064-03ND
2014-02-134B13064-02ND
2014-02-134B13064-04ND
2014-05-154E15061-02ND
2014-05-154E15061-03ND
2014-05-154E15061-01ND
2014-05-154E15061-04ND
2014-08-144H14120-02ND
2014-08-144H14120-03ND
2014-08-144H14120-04ND
2014-08-144H14120-01ND
2014-11-134K13101-03ND
2014-11-134K13101-04ND
2014-11-134K13101-01ND
2014-11-134K13101-02ND
2015-02-1212446989ND
2015-08-1313185094ND
2016-02-2513917125ND
2016-08-2514804547ND
2016-09-0214975540ND
2016-11-2315282663ND
2017-08-2416629488ND
2017-11-2217077344ND