Dibromochloromethane

Carthage

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	0.540 ppb	2	1	ND - 1.08 ppb
2015	1.12 ppb	2	2	0.730 ppb - 1.51 ppb
2016	0.525 ppb	4	2	ND - 1.22 ppb
2017	0.845 ppb	2	1	ND - 1.69 ppb
2018	0.630 ppb	2	1	ND - 1.26 ppb
2019	0.611 ppb	9	7	ND - 1.06 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
2014-08-29	AC33349	1.08 ppb
2014-08-29	AC33348	ND
2015-08-20	AC57441	1.51 ppb
2015-08-20	AC57440	0.730 ppb
2016-01-25	AC65786	0.880 ppb
2016-01-25	AC65785	ND
2016-08-01	AC79861	1.22 ppb
2016-08-01	AC79860	ND
2017-08-21	AD03453	ND
2017-08-21	AD03454	1.69 ppb
2018-08-20	AD31234	ND
2018-08-20	AD31235	1.26 ppb
2019-02-04	AD38449	0.870 ppb
2019-02-04	AD38450	ND
2019-02-22	AD40415	0.770 ppb
2019-03-05	AD41352	0.810 ppb
2019-04-16	AD47162	0.880 ppb
2019-07-22	AD52741	0.500 ppb
2019-08-19	AD53965	ND
2019-08-19	AD53966	1.06 ppb
2019-10-18	AD57410	0.610 ppb