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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Melissa

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

 

52

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.50 ppb64ND - 5.60 ppb
20151.75 ppb83ND - 7.60 ppb
2016ND80ND
2017ND80ND
20182.61 ppb86ND - 5.50 ppb
20191.77 ppb1410ND - 7.60 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
2014-06-16Q1421536003ND
2014-06-16Q1421536002ND
2014-09-15Q14443080022.40 ppb
2014-09-15Q14443080012.40 ppb
2014-11-24Q14574820024.60 ppb
2014-11-24Q14574820015.60 ppb
2015-02-03Q15040740032.70 ppb
2015-02-03Q15040740023.70 ppb
2015-04-29Q1515886001ND
2015-04-29Q1515886002ND
2015-09-30Q15385880027.60 ppb
2015-09-30Q1538588001ND
2015-11-19Q1546096002ND
2015-11-19Q1546096001ND
2016-02-04Q1605219002ND
2016-02-04Q1605219001ND
2016-05-16Q1619591002ND
2016-05-16Q1619591001ND
2016-08-03Q1632448002ND
2016-08-03Q1632448001ND
2016-11-01Q1646792001ND
2016-11-01Q1646792002ND
2017-02-07Q1705543002ND
2017-02-07Q1705543001ND
2017-05-04Q1718501001ND
2017-05-04Q1718501002ND
2017-07-27Q1731126002ND
2017-07-27Q1731126001ND
2017-11-13Q1758189003ND
2017-11-13Q1758189001ND
2018-02-07Q1804818002ND
2018-02-07Q1804818001ND
2018-05-08Q18187930023.60 ppb
2018-05-08Q18187930013.40 ppb
2018-08-17Q18333810012.00 ppb
2018-08-17Q18333810021.60 ppb
2018-10-30Q18435210034.80 ppb
2018-10-30Q18435210025.50 ppb
2019-02-12Q19067250022.20 ppb
2019-02-12Q19067250013.10 ppb
2019-05-14Q19248580032.40 ppb
2019-05-14Q19248580022.30 ppb
2019-06-21Q19390950021.20 ppb
2019-06-21Q19390950011.60 ppb
2019-08-15Q1955954011ND
2019-08-15Q19559540107.60 ppb
2019-08-15Q1955954003ND
2019-08-15Q1955954002ND
2019-10-24Q19736680051.20 ppb
2019-10-24Q19736680101.000 ppb
2019-10-24Q1973668012ND
2019-10-24Q19736680062.20 ppb