EWG's Tap Water Database — 2019 UPDATE


Dibromoacetic acid

Lake Mills Waterworks

Dibromoacetic 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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20130.263 ppb330.220 ppb - 0.310 ppb
20140.450 ppb110.450 ppb
20150.390 ppb110.390 ppb
20160.490 ppb110.490 ppb
20170.430 ppb110.430 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.04 ppb

The EWG Health Guideline of 0.04 ppb for dibromoacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2013-08-207392460.220 ppb
2013-08-207392470.260 ppb
2013-08-207392450.310 ppb
2014-09-158185550.450 ppb
2015-07-158712870.390 ppb
2016-08-089378840.490 ppb
2017-08-0910103460.430 ppb