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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

South Milwaukee 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
20140.966 ppb1613ND - 1.90 ppb
20150.0688 ppb161ND - 1.10 ppb
20160.231 ppb164ND - 1.20 ppb
2017ND160ND
20180.218 ppb164ND - 1.30 ppb
20190.606 ppb165ND - 2.60 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
2014-02-11770085ND
2014-02-11770087ND
2014-02-117700880.430 ppb
2014-02-11770086ND
2014-05-137854310.990 ppb
2014-05-137854321.20 ppb
2014-05-137854331.30 ppb
2014-05-137854341.60 ppb
2014-08-138103751.80 ppb
2014-08-138103741.90 ppb
2014-08-138103731.30 ppb
2014-08-138103720.760 ppb
2014-11-118308361.20 ppb
2014-11-118308390.890 ppb
2014-11-118308380.880 ppb
2014-11-118308371.20 ppb
2015-02-10842720ND
2015-02-108427221.10 ppb
2015-02-10842723ND
2015-02-10842721ND
2015-05-12859499ND
2015-05-12859500ND
2015-05-12859497ND
2015-05-12859498ND
2015-08-11876303ND
2015-08-11876301ND
2015-08-11876304ND
2015-08-11876302ND
2015-11-10893364ND
2015-11-10893366ND
2015-11-10893365ND
2015-11-10893367ND
2016-02-10904963ND
2016-02-10904964ND
2016-02-10904962ND
2016-02-10904961ND
2016-05-109204261.20 ppb
2016-05-109204280.960 ppb
2016-05-10920427ND
2016-05-10920425ND
2016-08-16939732ND
2016-08-16939731ND
2016-08-169397330.740 ppb
2016-08-169397300.790 ppb
2016-11-08957993ND
2016-11-08957994ND
2016-11-08957992ND
2016-11-08957995ND
2017-02-15973981ND
2017-02-15973979ND
2017-02-15973980ND
2017-02-15973978ND
2017-05-11988146ND
2017-05-11988148ND
2017-05-11988147ND
2017-05-11988149ND
2017-08-161011995ND
2017-08-161011994ND
2017-08-161011996ND
2017-08-161011993ND
2017-11-081028780ND
2017-11-081028781ND
2017-11-081028783ND
2017-11-081028782ND
2018-02-131040779ND
2018-02-131040778ND
2018-02-131040777ND
2018-02-131040780ND
2018-05-141055405ND
2018-05-141055403ND
2018-05-141055404ND
2018-05-141055402ND
2018-08-131073458ND
2018-08-131073456ND
2018-08-131073457ND
2018-08-131073459ND
2018-11-1210925120.630 ppb
2018-11-1210925130.670 ppb
2018-11-1210925150.880 ppb
2018-11-1210925141.30 ppb
2019-02-181105927ND
2019-02-181105926ND
2019-02-181105925ND
2019-02-181105928ND
2019-05-1511213931.80 ppb
2019-05-1511213941.80 ppb
2019-05-1511213911.80 ppb
2019-05-1511213921.70 ppb
2019-08-121140148ND
2019-08-121140147ND
2019-08-121140145ND
2019-08-1211401462.60 ppb
2019-11-111160231ND
2019-11-111160232ND
2019-11-111160230ND
2019-11-111160233ND