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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

River Acres Water Supply Corporation

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
2014ND40ND
2015ND40ND
2016ND40ND
2017ND80ND
20181.08 ppb82ND - 4.50 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
2014-03-12AC46768ND
2014-06-23AC57645ND
2014-09-11AC66706ND
2014-11-10AC71620ND
2015-02-19AC81170ND
2015-04-23AC89405ND
2015-09-11AD06731ND
2015-12-03AD15411ND
2016-02-11AD23371ND
2016-04-12AD32789ND
2016-09-12AD48862ND
2016-11-08AD57089ND
2017-01-20AD66051ND
2017-01-20AD66026ND
2017-05-18AD84803ND
2017-05-18AD84799ND
2017-08-23AD93945ND
2017-08-23AD93939ND
2017-11-21AE05557ND
2017-11-21AE05556ND
2018-03-05AE16601ND
2018-03-05AE16603ND
2018-06-14AE30002ND
2018-06-14AE30008ND
2018-07-25AE34457ND
2018-07-25AE34475ND
2018-12-04AE477764.50 ppb
2018-12-04AE477814.10 ppb
2019-02-21AE55285ND
2019-02-21AE55284ND
2019-05-29AE68380ND
2019-05-29AE68379ND
2019-08-01AE76769ND
2019-08-01AE76770ND
2019-11-21AE90163ND
2019-11-21AE90162ND