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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Warrenton

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

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
20150.663 ppb82ND - 2.80 ppb
20160.413 ppb81ND - 3.30 ppb
20170.725 ppb82ND - 3.50 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
2014-03-19AI36305ND
2014-03-19AI36304ND
2014-06-17AI43440ND
2014-06-17AI43439ND
2014-09-23AI54993ND
2014-09-23AI54992ND
2014-12-16AI61682ND
2014-12-16AI61681ND
2015-03-18AI69381ND
2015-03-18AI69380ND
2015-06-16AI79935ND
2015-06-16AI799362.50 ppb
2015-09-23AI90690ND
2015-09-23AI906892.80 ppb
2015-12-15AJ02969ND
2015-12-15AJ02968ND
2016-03-22AJ08567ND
2016-03-22AJ08566ND
2016-06-22AJ150123.30 ppb
2016-06-22AJ15011ND
2016-09-19AJ27822ND
2016-09-19AJ27821ND
2016-12-07AJ36313ND
2016-12-07AJ36314ND
2017-03-20AJ48396ND
2017-03-20AJ48395ND
2017-06-12AJ572743.50 ppb
2017-06-12AJ57273ND
2017-09-20AJ687152.30 ppb
2017-09-20AJ68714ND
2017-12-11AJ75253ND
2017-12-11AJ75252ND
2018-03-12AJ85476ND
2018-03-12AJ85475ND
2018-06-11AJ91232ND
2018-06-11AJ91233ND
2018-09-11AK00752ND
2018-09-11AK00751ND
2018-12-10AK07687ND
2018-12-10AK07686ND
2019-03-11AK13077ND
2019-03-11AK13076ND
2019-06-10AK19326ND
2019-06-10AK19325ND
2019-09-09AK29616ND
2019-09-09AK29615ND
2019-12-18AK38790ND
2019-12-18AK38791ND