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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Chippewa Falls Waterworks

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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

 

34

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.157 ppb72ND - 0.720 ppb
20150.0800 ppb71ND - 0.560 ppb
20160.0786 ppb72ND - 0.320 ppb
2017ND70ND
2018ND30ND
20190.223 ppb32ND - 0.430 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-04772834ND
2014-03-04772837ND
2014-05-20790678ND
2014-08-11809553ND
2014-08-118095540.380 ppb
2014-08-118095550.720 ppb
2014-12-02833622ND
2015-02-10842764ND
2015-02-10842766ND
2015-05-20860888ND
2015-09-15883126ND
2015-09-15883124ND
2015-09-158831230.560 ppb
2015-11-03892525ND
2016-02-10905009ND
2016-02-10905011ND
2016-06-06924846ND
2016-08-09938104ND
2016-08-099381050.230 ppb
2016-08-099381060.320 ppb
2016-11-09958363ND
2017-01-24971010ND
2017-05-02986303ND
2017-05-02986306ND
2017-07-261006848ND
2017-07-261006851ND
2017-07-261006852ND
2017-11-141029622ND
2018-04-301052422ND
2018-08-011070939ND
2018-08-011070940ND
2019-03-121109108ND
2019-09-0411453220.240 ppb
2019-09-0411453210.430 ppb