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Bromoform

Clarksville 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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20100.240 ppb51ND - 1.20 ppb
2011ND30ND
20121.25 ppb21ND - 2.50 ppb
20130.0850 ppb61ND - 0.510 ppb
2014ND60ND
2015ND60ND

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
2010-01-0410007003501ND
2010-02-0410036003202ND
2010-05-2510146001602ND
2010-08-0210217003002ND
2010-11-02103080088021.20 ppb
2011-01-0411006001101ND
2011-01-1611021000102ND
2011-04-0611097003002ND
2012-01-0412006010901ND
2012-05-29121520062022.50 ppb
2013-02-0513038002001ND
2013-04-0113094014201ND
2013-05-0713128000902ND
2013-07-0113184010101ND
2013-10-01132770013010.510 ppb
2013-11-1813325006301ND
2014-02-2614058002301ND
2014-03-1014072007401ND
2014-05-0514128012702ND
2014-11-1014317004302ND
2014-11-1014317004402ND
2014-12-0214338002902ND
2015-03-1015070002002ND
2015-03-1015070002102ND
2015-05-2015141008902ND
2015-05-2015141008002ND
2015-08-1015223000202ND
2015-08-1015223000102ND