Dibromochloromethane

City of Blythe

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
2014	15.8 ppb	18	16	ND - 23.0 ppb
2015	18.8 ppb	16	16	14.0 ppb - 22.0 ppb
2016	11.3 ppb	20	16	ND - 21.0 ppb
2017	17.7 ppb	17	16	ND - 22.0 ppb
2018	14.5 ppb	12	12	7.70 ppb - 18.0 ppb
2019	11.8 ppb	16	12	ND - 21.0 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
2014-01-22	4790-801-0800	20.0 ppb
2014-01-22	4790-804-0000	19.0 ppb
2014-01-22	4790-803-0810	18.0 ppb
2014-01-22	4790-802-0830	20.0 ppb
2014-04-16	4790-804-0700	19.0 ppb
2014-04-16	4790-801-0830	17.0 ppb
2014-04-16	4790-803-0600	16.0 ppb
2014-04-16	4790-802-0745	16.0 ppb
2014-07-22	4790-804-0930	18.0 ppb
2014-07-22	4790-803-1100	14.0 ppb
2014-07-22	4790-801-1030	17.0 ppb
2014-07-22	4790-802-1000	19.0 ppb
2014-10-14	4790-804-1120	9.50 ppb
2014-10-14	4790-801-1050	23.0 ppb
2014-10-14	4790-803-1030	21.0 ppb
2014-10-14	4790-802-1130	18.0 ppb
2014-12-17	4790-015-0740	ND
2014-12-17	4790-006-0640	ND
2015-01-20	4790-803-1030	16.0 ppb
2015-01-20	4790-801-1050	19.0 ppb
2015-01-20	4790-804-1120	22.0 ppb
2015-01-20	4790-802-1130	22.0 ppb
2015-04-15	4790-803-0700	18.0 ppb
2015-04-15	4790-801-0830	19.0 ppb
2015-04-15	4790-804-0730	21.0 ppb
2015-04-15	4790-802-0800	18.0 ppb
2015-07-13	4790-804-0730	20.0 ppb
2015-07-13	4790-803-0700	20.0 ppb
2015-07-13	4790-802-0800	17.0 ppb
2015-07-13	4790-801-0830	21.0 ppb
2015-10-28	4790-804-1400	18.0 ppb
2015-10-28	4790-802-1300	17.0 ppb
2015-10-28	4790-803-1330	14.0 ppb
2015-10-28	4790-801-1230	19.0 ppb
2016-01-18	4790-804-1030	16.0 ppb
2016-01-18	4790-803-1000	21.0 ppb
2016-01-18	4790-802-1100	16.0 ppb
2016-01-18	4790-801-1130	12.0 ppb
2016-04-21	4790-803-1100	14.0 ppb
2016-04-21	4790-804-1130	18.0 ppb
2016-04-21	4790-802-1030	16.0 ppb
2016-04-21	4790-801-1000	12.0 ppb
2016-07-25	4790-801-1000	9.40 ppb
2016-07-25	4790-802-1030	15.0 ppb
2016-07-25	4790-804-1130	6.70 ppb
2016-07-25	4790-803-1100	13.0 ppb
2016-10-17	4790-802-1030	17.0 ppb
2016-10-17	4790-801-1000	12.0 ppb
2016-10-17	4790-803-1100	15.0 ppb
2016-10-17	4790-804-1130	12.0 ppb
2016-11-29	4790-030-1015	ND
2016-11-29	4790-010-1115	ND
2016-11-29	4790-015-1100	ND
2016-11-29	4790-031-1000	ND
2017-01-17	4790-803-0700	18.0 ppb
2017-01-17	4790-804-0730	19.0 ppb
2017-01-17	4790-801-0600	12.0 ppb
2017-01-17	4790-802-0630	21.0 ppb
2017-04-18	4790-801-0600	19.0 ppb
2017-04-18	4790-804-0730	19.0 ppb
2017-04-18	4790-803-0700	17.0 ppb
2017-04-18	4790-802-0630	19.0 ppb
2017-07-17	4790-801-0600	22.0 ppb
2017-07-17	4790-804-0730	19.0 ppb
2017-07-17	4790-802-0630	19.0 ppb
2017-07-17	4790-803-0700	17.0 ppb
2017-10-26	4790-802-0630	21.0 ppb
2017-10-26	4790-803-0700	18.0 ppb
2017-10-26	4790-801-0600	22.0 ppb
2017-10-26	4790-804-0730	19.0 ppb
2017-11-20	4790-006-0700	ND
2018-01-22	4790-801-0600	16.0 ppb
2018-01-22	4790-802-0630	15.0 ppb
2018-01-22	4790-803-0700	15.0 ppb
2018-01-22	4790-804-0730	16.0 ppb
2018-04-16	4790-804-0730	16.0 ppb
2018-04-16	4790-803-0700	16.0 ppb
2018-04-16	4790-802-0630	17.0 ppb
2018-04-16	4790-801-0600	18.0 ppb
2018-07-17	4790-804-0730	7.70 ppb
2018-07-17	4790-801-0600	16.0 ppb
2018-07-17	4790-802-0630	9.70 ppb
2018-07-17	4790-803-0700	11.0 ppb
2019-01-28	4790-801-0800	15.0 ppb
2019-01-28	4790-802-0830	16.0 ppb
2019-01-28	4790-803-1030	17.0 ppb
2019-01-28	4790-804-1100	12.0 ppb
2019-04-29	4790-803-1030	19.0 ppb
2019-04-29	4790-802-0830	14.0 ppb
2019-04-29	4790-801-0800	21.0 ppb
2019-04-29	4790-804-1100	11.0 ppb
2019-07-16	4790-803-1200	15.0 ppb
2019-07-16	4790-801-1100	18.0 ppb
2019-07-16	4790-802-1130	15.0 ppb
2019-07-16	4790-804-1230	16.0 ppb
2019-11-20	4790-031-1400	ND
2019-11-20	4790-030-1315	ND
2019-11-20	4790-015-1300	ND
2019-12-17	4790-010-1330	ND