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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Concord Water Department

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

 

64

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
2014N/A00N/A
2015N/A00N/A
20160.131 ppb161ND - 2.10 ppb
2017ND160ND
20180.688 ppb164ND - 3.20 ppb
2019ND160ND

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
2016-02-05B600577002ND
2016-02-05B600577003ND
2016-02-05B600577004ND
2016-02-05B600577001ND
2016-05-04B602483001ND
2016-05-04B602483002ND
2016-05-04B602483003ND
2016-05-04B602483004ND
2016-08-05B607011002ND
2016-08-05B607011004ND
2016-08-05B6070110032.10 ppb
2016-08-05B607011001ND
2016-11-04B610074001ND
2016-11-04B610074002ND
2016-11-04B610074003ND
2016-11-04B610074004ND
2017-02-03B700543002ND
2017-02-03B700543004ND
2017-02-03B700543003ND
2017-02-03B700543001ND
2017-05-05B702263001ND
2017-05-05B702263002ND
2017-05-05B702263003ND
2017-05-05B702263004ND
2017-08-04B706613001ND
2017-08-04B706613002ND
2017-08-04B706613003ND
2017-08-04B706613004ND
2017-11-02B709647001ND
2017-11-02B709647002ND
2017-11-02B709647003ND
2017-11-02B709647004ND
2018-02-06178467.012.90 ppb
2018-02-06178467.04ND
2018-02-06178467.022.70 ppb
2018-02-06178467.033.20 ppb
2018-05-08181613.01ND
2018-05-08181613.02ND
2018-05-08181613.03ND
2018-05-08181613.04ND
2018-08-02184907.01ND
2018-08-02184907.02ND
2018-08-02184907.03ND
2018-08-02184907.042.20 ppb
2018-11-01188533.01ND
2018-11-01188533.02ND
2018-11-01188533.03ND
2018-11-01188533.04ND
2019-02-05191741.02ND
2019-02-05191741.04ND
2019-02-05191741.03ND
2019-02-05191741.01ND
2019-05-02194855.01ND
2019-05-02194855.02ND
2019-05-02194855.03ND
2019-05-02194855.04ND
2019-08-01198555.01ND
2019-08-01198555.02ND
2019-08-01198555.03ND
2019-08-01198555.04ND
2019-11-05202780.01ND
2019-11-05202780.02ND
2019-11-05202780.03ND
2019-11-05202780.04ND