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EWG's Tap Water Database — 2019 UPDATE

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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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.25 ppb21ND - 2.50 ppb
20130.0850 ppb61ND - 0.510 ppb
2014ND60ND
2015ND60ND
20160.400 ppb41ND - 1.60 ppb
2017ND30ND

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
2012-01-0412006010901ND
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
2016-01-0516008005301ND
2016-02-0116035000101ND
2016-05-0916133001402ND
2016-08-09162230052021.60 ppb
2017-01-0417005018601ND
2017-05-3017153000102ND
2017-07-1917201005402ND