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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Freeman PWS

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

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
20151.46 ppb81ND - 11.7 ppb
2016ND80ND
2017ND100ND
2018ND30ND
2019ND10ND

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
2014-02-14AC18080ND
2014-02-14AC18081ND
2014-05-28AC23089ND
2014-05-28AC23088ND
2014-12-01AC38132ND
2014-12-01AC38133ND
2015-03-18AC41854ND
2015-03-18AC4185511.7 ppb
2015-05-13AC46434ND
2015-05-13AC46433ND
2015-08-19AC57261ND
2015-08-19AC57262ND
2015-11-11AC62685ND
2015-11-11AC62684ND
2016-02-15AC66226ND
2016-02-15AC66227ND
2016-05-18AC71920ND
2016-05-18AC71919ND
2016-08-10AC81519ND
2016-08-10AC81520ND
2016-11-17AC86819ND
2016-11-17AC86818ND
2017-01-11AC89956ND
2017-01-11AC89955ND
2017-02-09AC90687ND
2017-02-09AC90688ND
2017-05-11AC95658ND
2017-05-11AC95657ND
2017-08-24AD03222ND
2017-08-24AD03223ND
2017-11-21AD09371ND
2017-11-21AD09370ND
2018-02-13AD14158ND
2018-02-13AD14157ND
2018-08-15AD31046ND
2019-08-13AD53767ND