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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

Osage City, City of

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.600 ppb41ND - 2.40 ppb
20131.90 ppb42ND - 5.20 ppb
2014ND40ND
2015ND10ND
2016ND10ND
2017ND10ND

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
2012-03-05576065DFND
2012-05-21579036DF2.40 ppb
2012-08-27584606DFND
2012-12-18588836DFND
2013-03-04592857DFND
2013-06-03596852DF2.40 ppb
2013-08-26602098DFND
2013-11-12605440DF5.20 ppb
2014-03-1074833ND
2014-06-09125047ND
2014-09-08189775ND
2014-12-15246739ND
2015-09-22409690ND
2016-09-13621832ND
2017-09-27847867ND