Dibromochloromethane

Eau Claire Waterworks

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	0.117 ppb	3	2	ND - 0.180 ppb
2015	ND	3	0	ND
2016	0.0380 ppb	5	1	ND - 0.190 ppb
2017	0.503 ppb	6	4	ND - 1.30 ppb
2018	0.157 ppb	6	3	ND - 0.470 ppb
2019	0.522 ppb	5	4	ND - 1.10 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
2014-07-21	804373	0.170 ppb
2014-07-21	804374	0.180 ppb
2014-07-21	804376	ND
2015-07-16	871767	ND
2015-07-16	871770	ND
2015-07-16	871769	ND
2016-07-26	935390	ND
2016-07-26	935393	0.190 ppb
2016-07-26	935392	ND
2016-09-01	942711	ND
2016-11-03	957173	ND
2017-02-21	974479	0.190 ppb
2017-05-09	987395	ND
2017-07-11	1002950	ND
2017-07-11	1002953	1.30 ppb
2017-07-11	1002952	1.30 ppb
2017-10-24	1026050	0.230 ppb
2018-03-14	1045099	ND
2018-05-08	1054395	ND
2018-08-29	1077023	ND
2018-08-29	1077025	0.470 ppb
2018-09-19	1082009	0.270 ppb
2018-12-12	1097339	0.200 ppb
2019-02-13	1104865	0.640 ppb
2019-04-22	1116666	0.340 ppb
2019-07-16	1134673	ND
2019-07-16	1134672	0.530 ppb
2019-07-16	1134671	1.10 ppb