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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Oakboro, Town 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.

 

45

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.750 ppb41ND - 3.00 ppb
20150.313 ppb81ND - 2.50 ppb
20161.000 ppb82ND - 4.20 ppb
2017ND90ND
2018ND80ND
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
2014-03-0714030882-023.00 ppb
2014-06-0614061484-002ND
2014-09-0514091015-002ND
2014-12-0414121321-002ND
2015-03-05ND
2015-03-05ND
2015-06-05ND
2015-06-05ND
2015-09-03ND
2015-09-03ND
2015-12-042.50 ppb
2015-12-04ND
2016-03-0415877-01ND
2016-03-0415877-02ND
2016-06-0219996-03ND
2016-06-0219996-02ND
2016-09-0924602-014.20 ppb
2016-09-0924602-023.80 ppb
2016-12-0928386-01ND
2016-12-0928386-02ND
2017-03-1032213-01ND
2017-03-1032213-03ND
2017-06-0735720-02ND
2017-06-0735720-01ND
2017-09-0840126-01ND
2017-09-0840125-02ND
2017-09-0840125-01ND
2017-12-0844021-03ND
2017-12-0844021-02ND
2018-03-0947803-03 ND
2018-03-0947803-02 ND
2018-06-0651915-01 ND
2018-06-0651915-02 ND
2018-09-0756087-01 ND
2018-09-0756087-03 ND
2018-12-0560232-01 ND
2018-12-0560232-02 ND
2019-03-0863989-02 ND
2019-03-0863989-03 ND
2019-06-0567852-01 ND
2019-06-0667852-02 ND
2019-09-0671735-01 ND
2019-09-0671735-02 ND
2019-12-2076409-02 ND
2019-12-2076409-01 ND