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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Lawn

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

 

24

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
2017ND40ND
20182.75 ppb43ND - 4.50 ppb
20191.95 ppb43ND - 3.20 ppb

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
2014-02-26AC44745ND
2014-06-17AC57160ND
2014-09-11AC67004ND
2014-12-11AC74636ND
2015-02-18AC80898ND
2015-05-05AC90728ND
2015-07-21AD00376ND
2015-10-15AD10802ND
2016-01-21AD19220ND
2016-05-24AD37940ND
2016-09-14AD49625ND
2016-11-17AD58513ND
2017-03-01Q1708978008ND
2017-06-13Q1724777003ND
2017-07-19Q1729960002ND
2017-12-14Q1766140002ND
2018-03-08Q1809708002ND
2018-06-25Q18251760024.50 ppb
2018-08-07Q18317780082.60 ppb
2018-11-27Q18479450023.90 ppb
2019-03-19Q1911333002ND
2019-06-03Q19307170023.20 ppb
2019-07-22Q19464070032.00 ppb
2019-12-10Q19795810022.60 ppb