Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Dibromochloromethane

West Sound Utility District #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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.657 ppb76ND - 1.40 ppb
20130.671 ppb76ND - 1.10 ppb
20141.25 ppb221.20 ppb - 1.30 ppb
20151.13 ppb220.750 ppb - 1.50 ppb
20161.25 ppb221.10 ppb - 1.40 ppb
20170.540 ppb52ND - 1.50 ppb

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
2012-07-23286220.500 ppb
2012-07-23286250.700 ppb
2012-07-2328620ND
2012-07-23286240.600 ppb
2012-07-23286230.800 ppb
2012-07-23286191.40 ppb
2012-07-23286210.600 ppb
2013-07-22301280.500 ppb
2013-07-2230127ND
2013-07-22301290.600 ppb
2013-07-22301320.900 ppb
2013-07-22301261.10 ppb
2013-07-22301300.700 ppb
2013-07-22301310.900 ppb
2014-07-09018861.30 ppb
2014-07-09018881.20 ppb
2015-07-17029391.50 ppb
2015-07-17029380.750 ppb
2016-07-121.40 ppb
2016-07-121.10 ppb
2017-06-29ND
2017-06-29ND
2017-06-29ND
2017-07-241.50 ppb
2017-07-241.20 ppb