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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

U.S. Marine Corps - Housing Coleville

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.158 ppb51ND - 0.790 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
20182.50 ppb221.10 ppb - 3.90 ppb
20190.700 ppb220.510 ppb - 0.890 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
2014-03-182326-001-1115ND
2014-03-182326-004-1155ND
2014-09-182326-601-11100.790 ppb
2014-09-182326-602-1127ND
2014-12-232326-008-1020ND
2018-08-152326-601-10403.90 ppb
2018-08-152326-602-08301.10 ppb
2019-08-212326-601-11000.890 ppb
2019-08-212326-602-10100.510 ppb