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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Nashville Rural Water Association

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

 

56

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.471 ppb143ND - 2.40 ppb
20150.600 ppb82ND - 2.50 ppb
20161.40 ppb84ND - 3.20 ppb
20170.600 ppb82ND - 2.50 ppb
20181.73 ppb84ND - 5.10 ppb
20191.09 ppb104ND - 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
2014-01-1314016005901ND
2014-01-1314016006301ND
2014-01-1314016005701ND
2014-01-1314016006401ND
2014-04-07141000071012.20 ppb
2014-04-0714100007601ND
2014-04-0714100007201ND
2014-04-07141000075012.00 ppb
2014-07-08141910056012.40 ppb
2014-07-0814191006301ND
2014-07-0814191005701ND
2014-07-0814191006201ND
2014-10-0614282011701ND
2014-10-0714282012501ND
2015-03-1915078006801ND
2015-03-1915078006901ND
2015-04-27151200023012.50 ppb
2015-04-27151200024012.30 ppb
2015-07-2915211002501ND
2015-07-2915211001901ND
2015-10-2715302001201ND
2015-10-2715302001301ND
2016-01-2116021001601ND
2016-01-2116021001701ND
2016-04-20161120038012.80 ppb
2016-04-20161120043012.40 ppb
2016-08-16162310077013.20 ppb
2016-08-1616231007401ND
2016-11-0716314004801ND
2016-11-07163140045012.80 ppb
2017-02-1417046003401ND
2017-02-1417046003701ND
2017-05-1517138003901ND
2017-05-1517138003201ND
2017-08-1417229000201ND
2017-08-1417229000901ND
2017-11-14173200017012.30 ppb
2017-11-14173200022012.50 ppb
2018-02-1318046000801ND
2018-02-1318046001401ND
2018-05-15181370048012.70 ppb
2018-05-15181370043013.30 ppb
2018-08-1418228003601ND
2018-08-1418228003201ND
2018-11-13183190071012.70 ppb
2018-11-13183190068015.10 ppb
2019-02-1219045007401ND
2019-02-1219045007701ND
2019-05-0719129004701ND
2019-05-0719129004601ND
2019-08-13192270029013.20 ppb
2019-09-1619262000301ND
2019-11-04193110012013.10 ppb
2019-11-04193110015012.00 ppb
2019-12-1019345005401ND
2019-12-10193450053012.60 ppb