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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Acton MUD

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.256 ppb162ND - 2.10 ppb
20150.688 ppb164ND - 3.00 ppb
2016ND160ND
20170.200 ppb162ND - 1.90 ppb
20180.613 ppb164ND - 5.10 ppb
20190.488 ppb166ND - 2.10 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
2014-02-26Q14064460012.10 ppb
2014-02-26Q1406446004ND
2014-02-26Q1406446003ND
2014-02-26Q14064460022.00 ppb
2014-04-16Q1412086058ND
2014-04-16Q1412086057ND
2014-04-16Q1412086056ND
2014-04-16Q1412086055ND
2014-08-18Q1437417004ND
2014-08-18Q1437417003ND
2014-08-18Q1437417005ND
2014-08-18Q1437417006ND
2014-10-22Q1453502004ND
2014-10-22Q1453502003ND
2014-10-22Q1453502002ND
2014-10-22Q1453502001ND
2015-02-09Q1504919060ND
2015-02-09Q1504919059ND
2015-02-09Q1504919058ND
2015-02-09Q1504919057ND
2015-06-23Q1523540003ND
2015-06-23Q1523540004ND
2015-06-23Q1523540006ND
2015-06-23Q15235400052.70 ppb
2015-08-06Q15308810042.40 ppb
2015-08-06Q15308810033.00 ppb
2015-08-06Q15308810022.90 ppb
2015-08-06Q1530881001ND
2015-10-27Q1542356014ND
2015-10-27Q1542356013ND
2015-10-27Q1542356012ND
2015-10-27Q1542356011ND
2016-01-19Q1602084052ND
2016-01-19Q1602084051ND
2016-01-19Q1602084053ND
2016-01-19Q1602084054ND
2016-05-31Q1621309004ND
2016-05-31Q1621309003ND
2016-05-31Q1621309002ND
2016-05-31Q1621309001ND
2016-07-28Q1630951004ND
2016-07-28Q1630951003ND
2016-07-28Q1630951002ND
2016-07-28Q1630951001ND
2016-11-30Q1652001001ND
2016-11-30Q1652001003ND
2016-11-30Q1652001002ND
2016-11-30Q1652001007ND
2017-02-16Q17068090051.30 ppb
2017-02-16Q1706809004ND
2017-02-16Q1706809003ND
2017-02-16Q1706809002ND
2017-05-08Q1718746005ND
2017-05-08Q1718746004ND
2017-05-08Q1718746003ND
2017-05-08Q1718746002ND
2017-07-17Q1729214002ND
2017-07-17Q17292140011.90 ppb
2017-07-17Q1729214003ND
2017-07-17Q1729214004ND
2017-10-05Q1749124052ND
2017-10-05Q1749124018ND
2017-10-05Q1749124051ND
2017-10-05Q1749124050ND
2018-02-15Q1806602004ND
2018-02-15Q1806602003ND
2018-02-15Q1806602002ND
2018-02-15Q1806602001ND
2018-05-01Q18173720221.10 ppb
2018-05-01Q1817372023ND
2018-05-01Q18173720251.20 ppb
2018-05-01Q1817372024ND
2018-07-23Q1829049004ND
2018-07-23Q1829049002ND
2018-07-23Q1829049001ND
2018-07-23Q1829049003ND
2018-12-11Q1850865003ND
2018-12-11Q1850865007ND
2018-12-11Q18508650022.40 ppb
2018-12-11Q18508650065.10 ppb
2019-01-10Q19015060131.20 ppb
2019-01-10Q19015060012.10 ppb
2019-01-10Q1901506007ND
2019-01-10Q1901506014ND
2019-04-18Q1915698008ND
2019-04-18Q1915698007ND
2019-04-18Q1915698006ND
2019-05-15Q1925754001ND
2019-09-04Q1962165004ND
2019-09-04Q1962165003ND
2019-09-04Q19621650021.30 ppb
2019-09-04Q19621650011.20 ppb
2019-10-29Q19743660011.000 ppb
2019-10-29Q1974366004ND
2019-10-29Q1974366003ND
2019-10-29Q19743660021.000 ppb