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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Blue Mountain

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

 

51

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.620 ppb102ND - 3.20 ppb
2015ND80ND
20160.233 ppb91ND - 2.10 ppb
20170.363 ppb81ND - 2.90 ppb
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
2014-01-1514017003101ND
2014-01-1514017003201ND
2014-02-2614058009701ND
2014-02-2614058009801ND
2014-04-10141010031013.00 ppb
2014-04-10141010030013.20 ppb
2014-07-0814190001101ND
2014-07-0814190001001ND
2014-10-1414289005001ND
2014-10-1414289005101ND
2015-01-1515016001601ND
2015-01-1515016001701ND
2015-04-1415106006701ND
2015-04-1415106006601ND
2015-07-1415197009101ND
2015-07-1415197009001ND
2015-10-1315289002001ND
2015-10-1315289002101ND
2016-01-1316015001501ND
2016-01-1316015001601ND
2016-04-1316106002401ND
2016-04-1316106002301ND
2016-06-06161610012012.10 ppb
2016-07-1116196008501ND
2016-07-1116196008601ND
2016-10-1216288003801ND
2016-10-1216288003701ND
2017-01-1117013001101ND
2017-01-1117013001001ND
2017-04-12171030045012.90 ppb
2017-04-1217103004601ND
2017-07-1117194013501ND
2017-07-1117194013401ND
2017-10-1617292001001ND
2017-10-1617292000901ND
2018-01-1018011007002ND
2018-01-1018011007102ND
2018-04-1018101002601ND
2018-04-1018101002501ND
2018-07-1018192005201ND
2018-07-1018192004501ND
2018-10-0818283004501ND
2018-10-0818283001901ND
2019-01-1419017009801ND
2019-01-1419017009901ND
2019-04-0919101010701ND
2019-04-0919101010601ND
2019-07-3019213003601ND
2019-07-3019213003501ND
2019-10-0819283010501ND
2019-10-0819283010401ND