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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Rocky Branch 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

 

88

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND160ND
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
2014-08-271329575ND
2014-08-271329574ND
2014-08-271329575ND
2014-08-271329574ND
2014-11-261353518ND
2014-11-261353519ND
2014-11-261353519ND
2014-11-261353518ND
2015-03-031376016ND
2015-03-031376017ND
2015-03-031376017ND
2015-03-031376016ND
2015-05-201397731ND
2015-05-201397732ND
2015-05-201397732ND
2015-05-201397731ND
2015-08-261422222ND
2015-08-261422223ND
2015-08-261422223ND
2015-08-261422222ND
2015-11-301447688ND
2015-11-301447689ND
2015-11-301447689ND
2015-11-301447688ND
2016-02-261470598ND
2016-02-261470599ND
2016-02-261470598ND
2016-02-261470599ND
2016-05-251494222ND
2016-05-251494223ND
2016-05-251494222ND
2016-05-251494223ND
2016-08-301520275ND
2016-08-301520276ND
2016-08-301520275ND
2016-08-301520276ND
2016-11-301544435ND
2016-11-301544434ND
2016-11-301544435ND
2016-11-301544434ND
2017-02-0735294463011ND
2017-02-0735294463010ND
2017-02-0735294463010ND
2017-02-0735294463011ND
2017-05-1635312626009ND
2017-05-1635312626010ND
2017-05-1635312626010ND
2017-05-1635312626009ND
2017-08-1035329805014ND
2017-08-1035329805013ND
2017-08-1035329805014ND
2017-08-1035329805013ND
2017-11-2735350758001ND
2017-11-2735350758002ND
2017-11-2735350758001ND
2017-11-2735350758002ND
2018-02-1935375782001ND
2018-02-1935375782002ND
2018-02-1935375782001ND
2018-02-1935375782002ND
2018-05-2435394579002ND
2018-05-2435394579002ND
2018-05-2935395206001ND
2018-05-2935395206001ND
2018-08-1435411621001ND
2018-08-1435411621002ND
2018-08-1435411621001ND
2018-08-1435411621002ND
2018-11-1335431808001ND
2018-11-1335431808002ND
2018-11-1335431808001ND
2018-11-1335431808002ND
2019-02-1835449366002ND
2019-02-1835449366001ND
2019-02-1835449366001ND
2019-02-1835449366002ND
2019-05-1335469325002ND
2019-05-1335469325002ND
2019-05-1335469325001ND
2019-05-1335469325001ND
2019-08-1435491211002ND
2019-08-1435491211001ND
2019-08-1435491211001ND
2019-08-1435491211002ND
2019-11-1835514071001ND
2019-11-1835514071002ND
2019-11-1835514071001ND
2019-11-1835514071002ND