Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

Archie PWS

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

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20146.39 ppb122ND - 39.1 ppb
2015ND80ND
2016ND60ND
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

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
2014-01-06AC16578ND
2014-01-06AC16579ND
2014-01-06AC16580ND
2014-01-06AC16577ND
2014-04-09AC21484ND
2014-04-09AC21485ND
2014-04-09AC21486ND
2014-04-09AC21487ND
2014-07-21AC3046839.1 ppb
2014-07-21AC3047137.6 ppb
2014-10-09AC37560ND
2014-10-09AC37561ND
2015-01-15AC40285ND
2015-01-15AC40284ND
2015-04-09AC44975ND
2015-04-09AC44974ND
2015-07-09AC54169ND
2015-07-09AC54168ND
2015-10-07AC61133ND
2015-10-07AC61132ND
2016-01-14AC64934ND
2016-01-14AC64935ND
2016-04-13AC69295ND
2016-04-13AC69294ND
2016-09-13AC83718ND
2016-09-13AC83717ND