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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Hudson Waterworks

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

 

74

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.240 ppb21ND - 0.480 ppb
2015ND80ND
2016ND160ND
2017ND160ND
2018ND160ND
2019ND160ND

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
2014-08-188112130.480 ppb
2014-08-18811212ND
2015-09-15883171ND
2015-09-15883173ND
2015-09-15883174ND
2015-09-15883172ND
2015-12-14897936ND
2015-12-14897939ND
2015-12-14897938ND
2015-12-14897937ND
2016-03-16910635ND
2016-03-16910636ND
2016-03-16910637ND
2016-03-16910638ND
2016-06-13926539ND
2016-06-13926540ND
2016-06-13926542ND
2016-06-13926541ND
2016-09-12944806ND
2016-09-12944805ND
2016-09-12944807ND
2016-09-12944804ND
2016-12-12965932ND
2016-12-12965934ND
2016-12-12965935ND
2016-12-12965933ND
2017-03-14977897ND
2017-03-14977899ND
2017-03-14977898ND
2017-03-14977896ND
2017-06-13997246ND
2017-06-13997248ND
2017-06-13997247ND
2017-06-13997245ND
2017-09-111017334ND
2017-09-111017336ND
2017-09-111017335ND
2017-09-111017337ND
2017-12-121033119ND
2017-12-121033121ND
2017-12-121033118ND
2017-12-121033120ND
2018-03-191045728ND
2018-03-191045727ND
2018-03-191045726ND
2018-03-191045729ND
2018-06-181062005ND
2018-06-181062006ND
2018-06-181062003ND
2018-06-181062004ND
2018-09-111079439ND
2018-09-111079437ND
2018-09-111079438ND
2018-09-111079436ND
2018-12-111097183ND
2018-12-111097184ND
2018-12-111097181ND
2018-12-191098460ND
2019-03-191110408ND
2019-03-191110409ND
2019-03-191110407ND
2019-03-191110410ND
2019-06-181128937ND
2019-06-181128938ND
2019-06-181128940ND
2019-06-181128939ND
2019-09-171148788ND
2019-09-171148789ND
2019-09-171148787ND
2019-09-171148790ND
2019-12-091165055ND
2019-12-161165761ND
2019-12-161165759ND
2019-12-161165760ND