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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Reamer Hill Water Assoc

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

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.600 ppb41ND - 2.40 ppb
20150.550 ppb41ND - 2.20 ppb
2016ND40ND
2017ND40ND
2018ND40ND
2019ND50ND

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
2014-02-1224804201ND
2014-05-1525627001ND
2014-08-14267883012.40 ppb
2014-11-1227481401ND
2015-02-1028123501ND
2015-05-1328880001ND
2015-08-11298335012.20 ppb
2015-11-1030528501ND
2016-02-1731176701ND
2016-05-1931903201ND
2016-08-1033028701ND
2016-11-1633829101ND
2017-02-2234635901ND
2017-05-1035422501ND
2017-08-0936670301ND
2017-11-1437672801ND
2018-02-1438599601ND
2018-05-0939355201ND
2018-08-2741166301ND
2018-11-0741897101ND
2019-02-1142953301ND
2019-05-0744068101ND
2019-08-1345597701ND
2019-08-1345597701ND
2019-11-1347279301ND