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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Cabot Waterworks

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

 

56

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND90ND
2016ND80ND
2017ND80ND
2018ND70ND
2019ND80ND

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
2014-01-1314016001601ND
2014-01-1314016001401ND
2014-01-1314016001301ND
2014-01-1314016001501ND
2014-04-0214093007001ND
2014-04-0214093006901ND
2014-04-0214093007101ND
2014-04-0214093006801ND
2014-07-0114184001601ND
2014-07-0114184001901ND
2014-07-0114184001801ND
2014-07-0114184001701ND
2014-10-0714282001601ND
2014-10-0714282001301ND
2014-10-0714282001501ND
2014-10-0714282001401ND
2015-01-0515008014201ND
2015-01-0515008014301ND
2015-04-0115092007701ND
2015-04-0115092007801ND
2015-05-0615127015301ND
2015-07-2115204006501ND
2015-07-2115204006601ND
2015-10-0615281005701ND
2015-10-0615281005801ND
2016-01-0516008001101ND
2016-01-0516008001001ND
2016-04-0516098002301ND
2016-04-0516098002201ND
2016-07-0616189015601ND
2016-07-0616189015701ND
2016-10-0416279001101ND
2016-10-0416279001201ND
2017-01-0417005015301ND
2017-01-0417005015401ND
2017-04-0417095001801ND
2017-04-0417095001701ND
2017-07-0517187004601ND
2017-07-0517187004501ND
2017-10-0217278004701ND
2017-10-0217278004801ND
2018-01-1518019003301ND
2018-01-1518019003201ND
2018-04-0418094002401ND
2018-04-0418094002501ND
2018-07-0418186011301ND
2018-07-0418186011401ND
2018-10-0318276002301ND
2019-01-0719010010101ND
2019-01-0719010010001ND
2019-04-0319093003201ND
2019-04-0319093003301ND
2019-07-0919192008301ND
2019-08-2119234001101ND
2019-10-0319277006901ND
2019-10-0319277006801ND