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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Ephesus

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

 

34

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0688 ppb81ND - 0.550 ppb
2015ND50ND
20160.195 ppb62ND - 0.660 ppb
20170.103 ppb61ND - 0.620 ppb
2018ND60ND
20190.237 ppb31ND - 0.710 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
2014-01-15AI26793ND
2014-01-15AI26792ND
2014-01-15AI26791ND
2014-04-22AI38581ND
2014-07-09AI45372ND
2014-07-09AI45371ND
2014-07-09AI453670.550 ppb
2014-11-12AI59496ND
2015-03-19AI69473ND
2015-03-19AI69472ND
2015-03-19AI69471ND
2015-07-28AI84482ND
2015-07-28AI84481ND
2016-03-23AJ08658ND
2016-05-24AJ128530.510 ppb
2016-08-09AJ21897ND
2016-08-23AJ23777ND
2016-08-23AJ23776ND
2016-10-26AJ322850.660 ppb
2017-02-01AJ43873ND
2017-04-26AJ54083ND
2017-07-31AJ62157ND
2017-08-23AJ65532ND
2017-08-23AJ65531ND
2017-10-24AJ722970.620 ppb
2018-01-30AJ78082ND
2018-01-30AJ78081ND
2018-01-30AJ78080ND
2018-04-11AJ87337ND
2018-08-20AJ98291ND
2018-08-20AJ98290ND
2019-05-14AK174690.710 ppb
2019-08-27AK28295ND
2019-08-27AK28296ND