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EWG's Tap Water Database

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Bromoform

Forest Water Supply Corporation

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.

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND40ND
2011ND40ND
2012ND50ND
2013ND50ND
2014ND80ND
2015ND90ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.5 ppb

The 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.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-03-181003543003ND
2010-06-071006217001ND
2010-09-301010005001ND
2010-12-081012404001ND
2011-02-071102160002ND
2011-06-021106117001ND
2011-08-251108B23001ND
2011-12-141112570001ND
2012-01-241201555005ND
2012-01-241201555003ND
2012-06-211206764001ND
2012-08-071208338001ND
2012-10-111210447001ND
2013-03-061303203002ND
2013-04-021304131001ND
2013-07-16Q1303849002ND
2013-10-22Q1309171004ND
2013-10-22Q1309171003ND
2014-03-06Q1407235004ND
2014-03-06Q1407235003ND
2014-05-30Q1418600002ND
2014-05-30Q1418600001ND
2014-09-09Q1442692002ND
2014-09-09Q1442692001ND
2014-11-06Q1455136002ND
2014-11-06Q1455136001ND
2015-02-05Q1504709003ND
2015-02-05Q1504709001ND
2015-02-05Q1504709002ND
2015-06-08Q1520776002ND
2015-06-08Q1520776001ND
2015-09-01Q1533590002ND
2015-09-01Q1533590001ND
2015-12-04Q1548414002ND
2015-12-04Q1548414001ND