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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Horse Shoe Road Water System

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

 

52

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016ND40ND
20170.213 ppb162ND - 1.70 ppb
2018ND160ND
20190.975 ppb166ND - 3.60 ppb

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
2016-08-291520295ND
2016-08-291520294ND
2016-08-291520295ND
2016-08-291520294ND
2017-02-0335292971007ND
2017-02-0335292971008ND
2017-02-0335292971008ND
2017-02-0335292971007ND
2017-05-04353113080201.70 ppb
2017-05-0435311308021ND
2017-05-04353113080201.70 ppb
2017-05-0435311308021ND
2017-08-0435328362037ND
2017-08-0435328362038ND
2017-08-0435328362037ND
2017-08-0435328362038ND
2017-11-2035349685001ND
2017-11-2035349685002ND
2017-11-2035349685001ND
2017-11-2035349685002ND
2018-02-0835373980001ND
2018-02-0835373980002ND
2018-02-0835373980002ND
2018-02-0835373980001ND
2018-05-0335390316002ND
2018-05-0335390316002ND
2018-05-0335390316001ND
2018-05-0335390316001ND
2018-08-0135408679002ND
2018-08-0135408679001ND
2018-08-0135408679002ND
2018-08-0135408679001ND
2018-11-0135428184002ND
2018-11-0135428184001ND
2018-11-0135428184002ND
2018-11-0135428184001ND
2019-02-1435449083002ND
2019-02-1435449083001ND
2019-02-1435449083002ND
2019-02-1435449083001ND
2019-05-2135470142002ND
2019-05-2135470142002ND
2019-05-21354701420011.10 ppb
2019-05-21354701420011.10 ppb
2019-08-22354927650023.10 ppb
2019-08-22354927650013.60 ppb
2019-08-22354927650013.60 ppb
2019-08-22354927650023.10 ppb
2019-11-2135514612001ND
2019-11-2135514612002ND
2019-11-2135514612001ND
2019-11-2135514612002ND