Bromodichloromethane

Carthage

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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	0.255 ppb	2	1	ND - 0.510 ppb
2015	0.415 ppb	2	1	ND - 0.830 ppb
2016	0.170 ppb	4	1	ND - 0.680 ppb
2017	0.405 ppb	2	1	ND - 0.810 ppb
2018	0.455 ppb	2	1	ND - 0.910 ppb
2019	0.198 ppb	9	3	ND - 0.650 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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	0.510 ppb
2014-08-29	AC33348	ND
2015-08-20	AC57441	0.830 ppb
2015-08-20	AC57440	ND
2016-01-25	AC65785	ND
2016-01-25	AC65786	ND
2016-08-01	AC79860	ND
2016-08-01	AC79861	0.680 ppb
2017-08-21	AD03453	ND
2017-08-21	AD03454	0.810 ppb
2018-08-20	AD31234	ND
2018-08-20	AD31235	0.910 ppb
2019-02-04	AD38449	0.510 ppb
2019-02-04	AD38450	ND
2019-02-22	AD40415	ND
2019-03-05	AD41352	ND
2019-04-16	AD47162	0.650 ppb
2019-07-22	AD52741	ND
2019-08-19	AD53965	ND
2019-08-19	AD53966	0.620 ppb
2019-10-18	AD57410	ND