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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Mustang SUD

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.

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.34 ppb168ND - 3.40 ppb
20153.26 ppb1613ND - 4.90 ppb
20160.831 ppb164ND - 4.30 ppb
2017ND160ND
20180.769 ppb167ND - 2.30 ppb
20190.256 ppb163ND - 1.50 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
2014-03-28Q1410246004ND
2014-03-28Q14102460032.30 ppb
2014-03-28Q14102460022.40 ppb
2014-03-28Q1410246001ND
2014-06-04Q14193740012.60 ppb
2014-06-04Q14193740133.40 ppb
2014-06-04Q1419374012ND
2014-06-04Q14193740112.80 ppb
2014-07-22Q1429879002ND
2014-07-22Q1429879001ND
2014-07-22Q1429879003ND
2014-07-22Q1429879004ND
2014-10-07Q14520610042.70 ppb
2014-10-07Q1452061003ND
2014-10-07Q14520610022.50 ppb
2014-10-07Q14520610012.80 ppb
2015-02-02Q15038300052.00 ppb
2015-02-02Q15038300043.00 ppb
2015-02-02Q1503830003ND
2015-02-02Q1503830002ND
2015-04-07Q15126080053.40 ppb
2015-04-07Q1512608006ND
2015-04-07Q15126080083.40 ppb
2015-04-07Q15126080073.80 ppb
2015-07-06Q15256810044.50 ppb
2015-07-06Q15256810034.40 ppb
2015-07-06Q15256810024.50 ppb
2015-07-06Q15256810014.60 ppb
2015-10-07Q15394550044.70 ppb
2015-10-07Q15394550034.50 ppb
2015-10-07Q15394550024.50 ppb
2015-10-07Q15394550014.90 ppb
2016-01-07Q1600448002ND
2016-01-07Q1600448001ND
2016-01-07Q1600448003ND
2016-01-07Q1600448004ND
2016-04-06Q16136080053.20 ppb
2016-04-06Q16136080044.30 ppb
2016-04-06Q16136080033.50 ppb
2016-04-06Q16136080022.30 ppb
2016-07-05Q1626800004ND
2016-07-05Q1626800003ND
2016-07-05Q1626800002ND
2016-07-05Q1626800001ND
2016-10-06Q1642414001ND
2016-10-06Q1642414004ND
2016-10-06Q1642414003ND
2016-10-06Q1642414002ND
2017-01-12Q1701667002ND
2017-01-12Q1701667003ND
2017-01-12Q1701667001ND
2017-01-12Q1701667004ND
2017-04-06Q1714362002ND
2017-04-06Q1714362004ND
2017-04-06Q1714362001ND
2017-04-06Q1714362003ND
2017-07-06Q1727638001ND
2017-07-06Q1727638002ND
2017-07-06Q1727638003ND
2017-07-06Q1727638004ND
2017-10-04Q1749048011ND
2017-10-04Q1749048010ND
2017-10-04Q1749048009ND
2017-10-04Q1749048008ND
2018-01-30Q1803504004ND
2018-01-30Q1803504002ND
2018-01-30Q1803504003ND
2018-01-30Q1803504001ND
2018-04-05Q18141780012.00 ppb
2018-04-05Q18141780042.30 ppb
2018-04-05Q18141780052.00 ppb
2018-04-05Q18141780022.10 ppb
2018-07-10Q1827459025ND
2018-07-10Q1827459024ND
2018-07-10Q1827459023ND
2018-07-10Q1827459022ND
2018-10-03Q18397150011.20 ppb
2018-10-03Q18397150041.30 ppb
2018-10-03Q18397150031.40 ppb
2018-10-03Q1839715002ND
2019-01-08Q1900592015ND
2019-01-08Q1900592004ND
2019-01-08Q1900592005ND
2019-01-08Q1900592016ND
2019-04-09Q1914503001ND
2019-04-09Q1914503004ND
2019-04-09Q1914503003ND
2019-04-09Q1914503002ND
2019-08-05Q19507230031.30 ppb
2019-08-05Q19507230021.50 ppb
2019-08-05Q1950723001ND
2019-08-05Q19507230041.30 ppb
2019-10-02Q1971111002ND
2019-10-02Q1971111005ND
2019-10-02Q1971111004ND
2019-10-02Q1971111003ND