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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Nashville Water Department #1

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

13

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.167 ppb31ND - 0.500 ppb
2015ND20ND
2016ND20ND
20170.683 ppb220.673 ppb - 0.693 ppb
2018ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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 Result
2014-09-020.500 ppb
2014-09-02ND
2014-09-02ND
2015-08-17ND
2015-08-17ND
2016-02-18ND
2016-02-18ND
2017-08-080.693 ppb
2017-08-080.673 ppb
2018-05-08ND
2018-05-08ND
2019-02-26ND
2019-02-26ND