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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Warrenton

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

 

54

Samples

0

Samples exceeding legal limit (MCL)

33

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.24 ppb97ND - 2.20 ppb
20151.16 ppb96ND - 3.00 ppb
20160.878 ppb95ND - 1.90 ppb
20170.611 ppb94ND - 1.60 ppb
20180.978 ppb96ND - 2.00 ppb
20191.29 ppb95ND - 2.70 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
2014-03-19AI36305ND
2014-03-19AI36304ND
2014-05-21AI411861.10 ppb
2014-06-17AI434401.50 ppb
2014-06-17AI434391.40 ppb
2014-09-23AI549931.60 ppb
2014-09-23AI549922.20 ppb
2014-12-16AI616821.50 ppb
2014-12-16AI616811.90 ppb
2015-03-18AI69381ND
2015-03-18AI69380ND
2015-04-08AI743330.610 ppb
2015-06-16AI799361.30 ppb
2015-06-16AI79935ND
2015-09-23AI906903.00 ppb
2015-09-23AI906892.90 ppb
2015-12-15AJ029691.30 ppb
2015-12-15AJ029681.30 ppb
2016-03-22AJ08567ND
2016-03-22AJ08566ND
2016-05-23AJ12710ND
2016-06-22AJ15012ND
2016-06-22AJ150111.20 ppb
2016-09-19AJ278221.50 ppb
2016-09-19AJ278211.90 ppb
2016-12-07AJ363131.80 ppb
2016-12-07AJ363141.50 ppb
2017-03-20AJ48396ND
2017-03-20AJ48395ND
2017-06-12AJ572841.20 ppb
2017-06-12AJ57274ND
2017-06-12AJ572731.60 ppb
2017-09-20AJ68715ND
2017-09-20AJ687141.20 ppb
2017-12-11AJ75253ND
2017-12-11AJ752521.50 ppb
2018-03-12AJ85476ND
2018-03-12AJ854751.10 ppb
2018-05-21AJ898231.40 ppb
2018-06-11AJ912331.10 ppb
2018-06-11AJ912321.30 ppb
2018-09-11AK007521.90 ppb
2018-09-11AK007512.00 ppb
2018-12-10AK07687ND
2018-12-10AK07686ND
2019-03-11AK13077ND
2019-03-11AK13076ND
2019-06-10AK193262.00 ppb
2019-06-10AK193252.20 ppb
2019-06-10AK193242.20 ppb
2019-09-09AK296162.50 ppb
2019-09-09AK296152.70 ppb
2019-12-18AK38790ND
2019-12-18AK38791ND