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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Tightsqueeze - (pcsa)

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
20159.00 ppb41ND - 36.0 ppb
2016ND40ND
2017ND40ND
2018ND40ND
20190.675 ppb41ND - 2.70 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
2014-02-0492188623001-HAA5ND
2014-04-0292195642001-HAAND
2014-07-0292207618001-HAA5ND
2014-10-2892223014001ND
2015-01-27460025-PACE ANALND
2015-04-30460221-PACE ANALND
2015-07-29460221-PACE ANALND
2015-10-27460221-PACE ANAL36.0 ppb
2016-01-2792284250001ND
2016-04-2692295152001ND
2016-07-2692306370001ND
2016-11-2292320536001ND
2017-01-2492327343001ND
2017-04-2592338397001ND
2017-07-2592348906001ND
2017-10-2492360235001ND
2018-01-2392370378-HAA5ND
2018-04-2592382215001ND
2018-07-2492392964001ND
2018-10-3092405265001ND
2019-01-2392414937001ND
2019-04-24924265710012.70 ppb
2019-07-3092439052001ND
2019-10-2392450760001ND