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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Haciendas Del Norte Water Improvement Di

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
20140.925 ppb83ND - 2.80 ppb
2015ND80ND
2016ND80ND
20170.200 ppb81ND - 1.60 ppb
20181.30 ppb85ND - 2.40 ppb
20190.725 ppb84ND - 2.00 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
2014-02-13Q1404523003ND
2014-02-13Q1404523002ND
2014-05-21Q14172620022.10 ppb
2014-05-21Q1417262001ND
2014-08-11Q1435549002ND
2014-08-11Q1435549001ND
2014-11-20Q14569520022.80 ppb
2014-11-20Q14569520012.50 ppb
2015-02-17Q1506613003ND
2015-02-17Q1506613002ND
2015-05-04Q1516251001ND
2015-05-04Q1516251002ND
2015-08-05Q1530563002ND
2015-08-05Q1530563001ND
2015-10-14Q1540720002ND
2015-10-14Q1540720001ND
2016-01-21Q1602676002ND
2016-01-21Q1602676001ND
2016-05-31Q1621328002ND
2016-05-31Q1621328001ND
2016-07-27Q1630789002ND
2016-07-27Q1630789001ND
2016-11-08Q1648663001ND
2016-11-08Q1648663002ND
2017-01-24Q1703109003ND
2017-01-24Q1703109001ND
2017-04-11Q1714665002ND
2017-04-11Q17146650011.60 ppb
2017-07-12Q1729243001ND
2017-07-12Q1729243002ND
2017-11-02Q1756478002ND
2017-11-02Q1756478001ND
2018-01-10Q1801266003ND
2018-01-10Q1801266002ND
2018-04-03Q18139910012.40 ppb
2018-04-03Q18139910022.40 ppb
2018-07-12Q18277680022.00 ppb
2018-07-12Q18277680012.10 ppb
2018-10-31Q18438050021.50 ppb
2018-10-31Q1843805001ND
2019-01-22Q1903665003ND
2019-01-22Q1903665001ND
2019-05-14Q1925475002ND
2019-05-14Q1925475001ND
2019-08-23Q19597630021.70 ppb
2019-08-23Q19597630011.10 ppb
2019-10-28Q19745780011.000 ppb
2019-10-28Q19745780022.00 ppb