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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

West Allis 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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND160ND
2015ND160ND
20160.0513 ppb161ND - 0.820 ppb
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
2014-02-13770578ND
2014-02-13770577ND
2014-02-13770576ND
2014-02-13770579ND
2014-05-12785059ND
2014-05-12785058ND
2014-05-12785060ND
2014-05-12785061ND
2014-08-11809461ND
2014-08-11809464ND
2014-08-11809463ND
2014-08-11809462ND
2014-11-03829415ND
2014-11-03829417ND
2014-11-03829416ND
2014-11-03829414ND
2015-02-09842431ND
2015-02-09842434ND
2015-02-09842433ND
2015-02-09842432ND
2015-05-06858551ND
2015-05-06858552ND
2015-05-06858549ND
2015-05-06858550ND
2015-08-11876541ND
2015-08-11876540ND
2015-08-11876543ND
2015-08-11876542ND
2015-11-02892274ND
2015-11-02892276ND
2015-11-02892275ND
2015-11-02892277ND
2016-02-09904811ND
2016-02-09904813ND
2016-02-09904814ND
2016-02-09904812ND
2016-05-05919804ND
2016-05-05919803ND
2016-05-05919805ND
2016-05-05919802ND
2016-08-02936893ND
2016-08-02936894ND
2016-08-02936892ND
2016-08-02936891ND
2016-10-31956532ND
2016-10-31956530ND
2016-10-31956531ND
2016-10-319565330.820 ppb
2017-02-07972722ND
2017-02-07972720ND
2017-02-07972721ND
2017-02-07972723ND
2017-05-08987235ND
2017-05-08987238ND
2017-05-08987236ND
2017-05-08987237ND
2017-08-091010331ND
2017-08-091010330ND
2017-08-091010333ND
2017-08-091010332ND
2017-11-081028893ND
2017-11-081028891ND
2017-11-081028892ND
2017-11-081028890ND
2018-02-071040156ND
2018-02-071040157ND
2018-02-071040154ND
2018-02-071040155ND
2018-05-071054262ND
2018-05-071054263ND
2018-05-071054265ND
2018-05-071054264ND
2018-08-061071755ND
2018-08-061071758ND
2018-08-061071757ND
2018-08-061071756ND
2018-11-061091334ND
2018-11-061091333ND
2018-11-061091332ND
2018-11-061091335ND
2019-02-041103566ND
2019-02-041103565ND
2019-02-041103567ND
2019-02-041103568ND
2019-05-061119260ND
2019-05-061119261ND
2019-05-061119259ND
2019-05-061119262ND
2019-08-051138433ND
2019-08-051138432ND
2019-08-051138434ND
2019-08-051138431ND
2019-11-041158995ND
2019-11-041158994ND
2019-11-041158993ND
2019-11-041158996ND