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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

Choice Water Supply Corporation

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.

 

10

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
20141.10 ppb21ND - 2.20 ppb
2015ND20ND
20166.80 ppb226.30 ppb - 7.30 ppb
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
2013-08-13Q1305388002ND
2013-08-13Q1305388001ND
2014-09-02Q14409660062.20 ppb
2014-09-02Q1440966005ND
2015-07-30Q1529716018ND
2015-07-30Q1529716017ND
2016-09-13Q16371450106.30 ppb
2016-09-13Q16371450097.30 ppb
2017-09-28Q1747290001ND
2017-09-28Q1747290002ND