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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Greenwood

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

 

52

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.373 ppb112ND - 2.10 ppb
20150.263 ppb81ND - 2.10 ppb
20160.538 ppb82ND - 2.20 ppb
20170.250 ppb81ND - 2.00 ppb
20182.09 ppb85ND - 4.50 ppb
20190.722 ppb92ND - 3.90 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
2014-01-2814030005401ND
2014-01-2814030005501ND
2014-01-2814030005301ND
2014-04-22141140023012.10 ppb
2014-04-22141140024012.00 ppb
2014-04-2214114002001ND
2014-07-2214205007401ND
2014-07-2214205007501ND
2014-07-2214205007601ND
2014-11-2514330004901ND
2014-11-2514330004801ND
2015-03-10150710062012.10 ppb
2015-03-1015071006301ND
2015-05-1915141012401ND
2015-05-1915141012301ND
2015-08-0415218009501ND
2015-08-0415218009401ND
2015-11-1715322000101ND
2015-11-1715322000201ND
2016-02-09160420040012.20 ppb
2016-02-0916042003901ND
2016-06-2716181000501ND
2016-06-2716181000601ND
2016-08-16162310036012.10 ppb
2016-08-1616231003501ND
2016-11-1416321003101ND
2016-11-1416321003001ND
2017-02-0717039006401ND
2017-02-0717039006701ND
2017-05-0817130002301ND
2017-05-08171300024012.00 ppb
2017-08-0817222005101ND
2017-09-1117257004301ND
2017-11-0717313012601ND
2017-11-0717313012501ND
2018-02-07180400054013.90 ppb
2018-02-07180400055012.40 ppb
2018-04-30181230002014.50 ppb
2018-04-30181230001012.50 ppb
2018-08-08182210058013.40 ppb
2018-08-0818221005901ND
2018-10-2918305008201ND
2018-10-2918305008501ND
2019-01-28190310020013.90 ppb
2019-01-28190310019012.60 ppb
2019-04-2219115001301ND
2019-04-2219115001201ND
2019-05-0619128001801ND
2019-07-2219206005001ND
2019-07-2219206004901ND
2019-10-2119297002101ND
2019-11-1819325005201ND