EWG's Tap Water Database — 2021 UPDATE


Dibromoacetic acid

Genoa City 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
20140.874 ppb110.874 ppb
20151.38 ppb111.38 ppb
20161.49 ppb111.49 ppb
20170.883 ppb110.883 ppb
20181.03 ppb111.03 ppb
20190.850 ppb110.850 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
2014-07-214070783-010.874 ppb
2015-08-045080107-021.38 ppb
2016-08-016080053-011.49 ppb
2017-07-2517G1001-010.883 ppb
2018-08-1318H0478-011.03 ppb
2019-08-2719H0987-010.850 ppb