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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Randall-bold Water Treatment Plant

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
2017ND50ND
2018ND20ND
2019ND50ND

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
2014-03-049590-002-1225ND
2014-06-039590-002-1235ND
2014-09-029590-002-1435ND
2014-12-099590-002-0925ND
2015-03-129590-002-0918ND
2015-06-029590-002-1414ND
2015-09-089590-002-1420ND
2015-12-229590-002-1310ND
2016-03-089590-002-1330ND
2016-06-079590-002-1037ND
2016-09-139590-002-0945ND
2016-12-139590-002-1148ND
2017-03-079590-002-1430ND
2017-03-099590-002-1005ND
2017-06-069590-002-0830ND
2017-09-129590-002-0950ND
2017-12-129590-002-1130ND
2018-09-111644-002-1235ND
2018-12-061644-002-1005ND
2019-03-051644-002-0930ND
2019-06-041644-002-0915ND
2019-09-101644-002-0854ND
2019-10-011644-002-0956ND
2019-12-191644-002-0825ND