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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

Dunfermline-St. David Water Commission

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

 

14

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.60 ppb42ND - 6.40 ppb
20130.355 ppb42ND - 0.910 ppb
20140.748 ppb330.722 ppb - 0.789 ppb
20150.602 ppb110.602 ppb
2016ND10ND
2017ND10ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2012-01-102011317-014.00 ppb
2012-04-022040173-016.40 ppb
2012-07-022070195-01ND
2012-10-022100519-01ND
2013-01-183012533-010.910 ppb
2013-05-103051565-01ND
2013-07-113071621-010.511 ppb
2013-11-053110372-02ND
2014-02-034020032-020.732 ppb
2014-05-054050328-020.789 ppb
2014-08-054080562-020.722 ppb
2015-02-025020018-020.602 ppb
2016-02-016020048-02ND
2017-02-067020690-02ND