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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Liberty

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

 

58

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.36 ppb163ND - 8.62 ppb
2015ND160ND
2016ND160ND
2017ND60ND
2018ND20ND
2019ND20ND

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
2014-01-29AC16646ND
2014-01-29AC16645ND
2014-01-29AC16648ND
2014-01-29AC16647ND
2014-04-30AC21552ND
2014-04-30AC21553ND
2014-04-30AC21554ND
2014-04-30AC21555ND
2014-07-23AC30563ND
2014-07-23AC30560ND
2014-07-23AC30561ND
2014-07-23AC305628.62 ppb
2014-12-03AC376127.55 ppb
2014-12-03AC376135.59 ppb
2014-12-03AC37614ND
2014-12-03AC37615ND
2015-01-14AC40337ND
2015-01-14AC40336ND
2015-01-14AC40339ND
2015-01-14AC40338ND
2015-04-28AC45014ND
2015-04-28AC45017ND
2015-04-28AC45016ND
2015-04-28AC45015ND
2015-08-05AC54231ND
2015-08-05AC54230ND
2015-08-05AC54232ND
2015-08-05AC54233ND
2015-10-22AC61175ND
2015-10-22AC61176ND
2015-10-22AC61177ND
2015-10-22AC61174ND
2016-01-14AC64981ND
2016-01-14AC64982ND
2016-01-14AC64980ND
2016-01-14AC64979ND
2016-04-14AC69338ND
2016-04-14AC69341ND
2016-04-14AC69339ND
2016-04-14AC69340ND
2016-07-11AC79667ND
2016-07-11AC79670ND
2016-07-11AC79669ND
2016-07-11AC79668ND
2016-10-25AC86250ND
2016-10-25AC86248ND
2016-10-25AC86247ND
2016-10-25AC86249ND
2017-01-17AC89060ND
2017-01-17AC89059ND
2017-01-17AC89058ND
2017-01-17AC89057ND
2017-07-07AD01345ND
2017-07-07AD01346ND
2018-07-19AD29123ND
2018-07-19AD29124ND
2019-07-10AD51740ND
2019-07-10AD51741ND