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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

East Fork 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.

MORE ABOUT THIS CONTAMINANT

 

78

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.42 ppb63ND - 7.00 ppb
20154.79 ppb86ND - 9.40 ppb
20160.994 ppb164ND - 4.40 ppb
2017ND160ND
20181.89 ppb1612ND - 3.30 ppb
20192.04 ppb1615ND - 3.90 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
2014-04-14Q14116740032.40 ppb
2014-04-14Q1411674002ND
2014-08-01Q1433370002ND
2014-08-01Q1433370001ND
2014-10-21Q14538230025.10 ppb
2014-10-21Q14538230017.00 ppb
2015-01-28Q15033380042.80 ppb
2015-01-28Q15033380033.50 ppb
2015-04-23Q15152540017.40 ppb
2015-04-23Q1515254002ND
2015-08-03Q15299840029.40 ppb
2015-08-03Q1529984001ND
2015-10-13Q15400690028.90 ppb
2015-10-13Q15400690016.30 ppb
2016-01-25Q1603372004ND
2016-01-25Q1603372003ND
2016-01-25Q1603372002ND
2016-01-25Q1603372001ND
2016-04-25Q16164470063.70 ppb
2016-04-25Q16164470033.50 ppb
2016-04-25Q16164470044.30 ppb
2016-04-25Q16164470054.40 ppb
2016-07-28Q1631004004ND
2016-07-28Q1631004003ND
2016-07-28Q1631004002ND
2016-07-28Q1631004001ND
2016-10-17Q1644221004ND
2016-10-17Q1644221003ND
2016-10-17Q1644221002ND
2016-10-17Q1644221001ND
2017-01-18Q1702897002ND
2017-01-18Q1702897004ND
2017-01-18Q1702897001ND
2017-01-18Q1702897003ND
2017-04-28Q1717610001ND
2017-04-28Q1717610002ND
2017-04-28Q1717610003ND
2017-04-28Q1717610004ND
2017-07-19Q1730099002ND
2017-07-19Q1730099004ND
2017-07-19Q1730099001ND
2017-07-19Q1730099003ND
2017-10-18Q1753896005ND
2017-10-18Q1753896002ND
2017-10-18Q1753896006ND
2017-10-18Q1753896004ND
2018-01-23Q1802553002ND
2018-01-23Q1802553003ND
2018-01-23Q1802553001ND
2018-01-23Q1802553004ND
2018-04-25Q18170240032.40 ppb
2018-04-25Q18170240023.30 ppb
2018-04-25Q18170240043.30 ppb
2018-04-25Q18170240012.50 ppb
2018-07-27Q18301070012.60 ppb
2018-07-27Q18301070022.30 ppb
2018-07-27Q18301070032.10 ppb
2018-07-27Q18301070052.50 ppb
2018-10-26Q18431980022.60 ppb
2018-10-26Q18431980042.20 ppb
2018-10-26Q18431980012.30 ppb
2018-10-26Q18431980032.10 ppb
2019-01-31Q19049040031.90 ppb
2019-01-31Q19049040012.00 ppb
2019-01-31Q19049040022.00 ppb
2019-01-31Q19049040042.10 ppb
2019-05-07Q1922537004ND
2019-05-07Q19225370012.00 ppb
2019-05-07Q19225370022.90 ppb
2019-05-07Q19225370032.30 ppb
2019-09-04Q19618710043.90 ppb
2019-09-04Q19618710032.20 ppb
2019-09-04Q19618710022.50 ppb
2019-09-04Q19618710012.70 ppb
2019-12-04Q19792570031.40 ppb
2019-12-04Q19792570061.30 ppb
2019-12-04Q19792570051.70 ppb
2019-12-04Q19792570041.80 ppb