EWG's Tap Water Database — 2021 UPDATE


Dibromoacetic acid

Hudson Water Supply

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
20141.000 ppb221.000 ppb
20151.000 ppb221.000 ppb
20161.000 ppb221.000 ppb
20172.00 ppb112.00 ppb
20180.760 ppb110.760 ppb
20191.27 ppb111.27 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
2014-07-1420639821.000 ppb
2014-07-1420639831.000 ppb
2015-07-13OE2667141.000 ppb
2015-07-13OE2667131.000 ppb
2016-07-11OE3996711.000 ppb
2016-07-11OE3996721.000 ppb
2017-07-17OE5387872.00 ppb
2018-07-091G80571-010.760 ppb
2019-07-011G90202-011.27 ppb