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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Roper 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

 

50

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND100ND
20161.49 ppb83ND - 7.60 ppb
20170.763 ppb82ND - 3.10 ppb
20181.03 ppb82ND - 4.20 ppb
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
2014-03-1321407314/16ND
2014-03-1321407315/17ND
2014-06-2621418119/21ND
2014-06-2621418118/20ND
2014-09-1621426221ND
2014-09-2621426222ND
2014-12-1721435302/04ND
2014-12-1721435301/03ND
2015-03-26ND
2015-03-26ND
2015-06-23ND
2015-06-23ND
2015-09-29ND
2015-09-29ND
2015-09-29ND
2015-09-29ND
2015-12-08ND
2015-12-08ND
2016-03-2421608802 216088ND
2016-03-2421608801 2160880ND
2016-06-2821618306ND
2016-06-2821618305ND
2016-09-088069-090816-B01MND
2016-09-088069-090816-B02M7.60 ppb
2016-12-228069-122216-B02M2.20 ppb
2016-12-228069-122216-B01M2.10 ppb
2017-03-038069-030317-B01MND
2017-03-038069-030317-B02MND
2017-06-228069-062217-B01MND
2017-06-228069-062217-B02M3.00 ppb
2017-09-268069-092617-B01MND
2017-09-268069-092617-B02M3.10 ppb
2017-12-058069-120517-B01MND
2017-12-058069-120517-B02MND
2018-03-298069-032918-B02M4.20 ppb
2018-03-298069-032918-B01MND
2018-06-198069-061918-B01M4.00 ppb
2018-06-198069-061918-B02MND
2018-09-258069-092518-B01MND
2018-09-258069-092518-B02MND
2018-12-188069_121818_B01MND
2018-12-188069_121818_B02MND
2019-03-198069-031919-B01MND
2019-03-198069-031919-B02MND
2019-06-188069-061819-B01MND
2019-06-188069-061819-B02MND
2019-09-168069-091619-B01MND
2019-09-168069-091619-B02MND
2019-12-208069-122019-B02MND
2019-12-208069-122019-B01MND