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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Madison Water Works

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND20ND
2014ND20ND
2015ND20ND
2016ND20ND
2017ND20ND

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
2012-02-16L560953-1VND
2012-04-25L572045-1ND
2012-12-12L611051-1ND
2013-12-10L673256-2ND
2013-12-10L673256-1ND
2014-10-14L727671-1ND
2014-10-23L729555-1ND
2015-12-09L806002-001ND
2015-12-09L806002-002ND
2016-11-09L871807-2ND
2016-11-09L871807-1ND
2017-10-11L943310-1ND
2017-10-11L943310-2ND