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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Osage City, City of

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND40ND
2014ND40ND
2015ND10ND
2016ND10ND
2017ND10ND

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
2012-03-05576065TFND
2012-05-21579036TFND
2012-08-27584606TFND
2012-12-18588836TFND
2013-03-04592857TFND
2013-06-03596852TFND
2013-08-26602098TFND
2013-11-12605441TFND
2014-03-1074835ND
2014-06-09125048ND
2014-09-08189776ND
2014-12-15246740ND
2015-09-22409691ND
2016-09-13621833ND
2017-09-27847866ND