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EWG's Tap Water Database — 2021 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.

MORE ABOUT THIS CONTAMINANT

 

25

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND60ND
20160.400 ppb41ND - 1.60 ppb
2017ND30ND
2018ND30ND
2019ND30ND

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
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
2018-01-0318004013001ND
2018-05-0818130008102ND
2018-07-0318186012502ND
2019-02-0519038001701ND
2019-05-0719128001002ND
2019-07-0219183000101ND