Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dibromochloromethane

Duvall City Of

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.

MORE ABOUT THIS CONTAMINANT

 

41

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
20150.537 ppb62ND - 1.85 ppb
2016ND80ND
2017ND90ND
2018ND80ND
2019ND80ND

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 Lab ID Result
2014-05-2309169ND
2014-11-2101139ND
2015-05-2207415ND
2015-05-2207416ND
2015-08-2159013ND
2015-08-2159012ND
2015-11-17431041.37 ppb
2015-11-17431031.85 ppb
2016-02-17ND
2016-02-17ND
2016-05-31ND
2016-05-31ND
2016-08-17ND
2016-08-17ND
2016-11-18ND
2016-11-18ND
2017-02-23ND
2017-02-23ND
2017-05-12ND
2017-05-12ND
2017-05-12ND
2017-08-17ND
2017-08-17ND
2017-11-10ND
2017-11-10ND
2018-02-09ND
2018-02-09ND
2018-05-11ND
2018-05-11ND
2018-08-10ND
2018-08-10ND
2018-11-09ND
2018-11-09ND
2019-02-22ND
2019-02-22ND
2019-05-10ND
2019-05-10ND
2019-08-09ND
2019-08-09ND
2019-11-08ND
2019-11-08ND