Dibromochloromethane

Santa Clarita Water Division

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

272

Samples

Samples exceeding legal limit (MCL)

197

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	6.32 ppb	45	32	ND - 13.0 ppb
2015	8.97 ppb	43	32	ND - 27.0 ppb
2016	10.6 ppb	47	32	ND - 32.0 ppb
2017	12.4 ppb	47	35	ND - 26.0 ppb
2018	7.11 ppb	45	33	ND - 26.0 ppb
2019	9.01 ppb	45	33	ND - 27.0 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
2014-02-13	9590-800-0950	10.00 ppb
2014-02-13	9590-801-1110	11.0 ppb
2014-02-13	9590-802-1130	12.0 ppb
2014-02-13	9590-803-1005	9.40 ppb
2014-02-13	9590-804-1000	9.20 ppb
2014-02-13	9590-805-1115	12.0 ppb
2014-02-13	9590-806-1040	9.20 ppb
2014-02-13	9590-807-1140	5.90 ppb
2014-05-15	9590-800-1200	12.0 ppb
2014-05-15	9590-801-1245	8.40 ppb
2014-05-15	9590-802-1215	10.00 ppb
2014-05-15	9590-803-1310	5.00 ppb
2014-05-15	9590-804-1400	8.60 ppb
2014-05-15	9590-805-1500	7.70 ppb
2014-05-15	9590-806-1330	8.80 ppb
2014-05-15	9590-807-1130	7.70 ppb
2014-06-11	2104-002-1010	ND
2014-06-11	2104-006-0950	ND
2014-06-11	2104-007-0845	ND
2014-06-11	2104-008-1035	ND
2014-06-11	2104-009-1030	ND
2014-06-11	2104-012-0955	ND
2014-06-11	2104-013-1100	ND
2014-06-11	2104-014-1110	ND
2014-06-11	2104-015-0920	ND
2014-06-11	2104-016-1025	ND
2014-06-11	2104-025-1000	ND
2014-06-11	2104-039-0830	ND
2014-06-11	2104-040-0855	ND
2014-08-14	9590-800-1340	12.0 ppb
2014-08-14	9590-801-1105	13.0 ppb
2014-08-14	9590-802-1320	6.80 ppb
2014-08-14	9590-803-1225	8.80 ppb
2014-08-14	9590-804-1035	8.10 ppb
2014-08-14	9590-805-1000	7.50 ppb
2014-08-14	9590-806-1135	6.50 ppb
2014-08-14	9590-807-0925	7.60 ppb
2014-11-13	9590-800-1345	10.00 ppb
2014-11-13	9590-801-1230	10.00 ppb
2014-11-13	9590-802-1315	5.60 ppb
2014-11-13	9590-803-1345	8.20 ppb
2014-11-13	9590-804-1410	12.0 ppb
2014-11-13	9590-805-1115	10.00 ppb
2014-11-13	9590-806-1340	5.90 ppb
2014-11-13	9590-807-1155	5.60 ppb
2015-02-12	9590-800-1245	13.0 ppb
2015-02-12	9590-801-1005	22.0 ppb
2015-02-12	9590-802-1240	11.0 ppb
2015-02-12	9590-803-1130	14.0 ppb
2015-02-12	9590-804-1030	13.0 ppb
2015-02-12	9590-805-1100	9.10 ppb
2015-02-12	9590-806-1105	11.0 ppb
2015-02-12	9590-807-1145	16.0 ppb
2015-05-14	9590-800-1120	7.30 ppb
2015-05-14	9590-801-1050	27.0 ppb
2015-05-14	9590-802-1100	5.60 ppb
2015-05-14	9590-803-1140	6.10 ppb
2015-05-14	9590-804-0950	5.30 ppb
2015-05-14	9590-805-1015	4.60 ppb
2015-05-14	9590-806-1400	8.10 ppb
2015-05-14	9590-807-1320	4.20 ppb
2015-06-03	2104-002-0950	ND
2015-06-03	2104-006-0945	ND
2015-06-03	2104-007-0920	ND
2015-06-03	2104-012-0825	ND
2015-06-03	2104-015-0845	ND
2015-06-03	2104-016-0840	ND
2015-06-03	2104-019-0900	ND
2015-06-03	2104-039-1035	ND
2015-06-03	2104-040-0905	ND
2015-06-10	2104-009-0845	ND
2015-08-13	9590-800-1120	16.0 ppb
2015-08-13	9590-801-1100	27.0 ppb
2015-08-13	9590-802-1113	7.00 ppb
2015-08-13	9590-803-0942	19.0 ppb
2015-08-13	9590-804-1055	11.0 ppb
2015-08-13	9590-805-1030	8.70 ppb
2015-08-13	9590-806-1025	6.50 ppb
2015-08-13	9590-807-0945	8.30 ppb
2015-08-27	2104-025-0945	ND
2015-11-09	9590-800-0900	16.0 ppb
2015-11-09	9590-801-0825	12.0 ppb
2015-11-09	9590-802-0830	11.0 ppb
2015-11-09	9590-803-0945	19.0 ppb
2015-11-09	9590-804-0845	13.0 ppb
2015-11-09	9590-805-0710	15.0 ppb
2015-11-09	9590-806-1030	10.00 ppb
2015-11-09	9590-807-1000	9.00 ppb
2016-01-29	9590-013-1110	ND
2016-02-08	9590-800-1025	12.0 ppb
2016-02-08	9590-801-0930	18.0 ppb
2016-02-08	9590-802-1000	12.0 ppb
2016-02-08	9590-803-0910	14.0 ppb
2016-02-08	9590-804-1040	13.0 ppb
2016-02-08	9590-805-1115	9.80 ppb
2016-02-08	9590-806-0950	8.70 ppb
2016-02-08	9590-807-0840	11.0 ppb
2016-03-29	2104-014-1335	ND
2016-05-09	9590-800-0900	12.0 ppb
2016-05-09	9590-801-1000	20.0 ppb
2016-05-09	9590-802-0830	11.0 ppb
2016-05-09	9590-803-0935	7.10 ppb
2016-05-09	9590-804-0925	11.0 ppb
2016-05-09	9590-805-0900	11.0 ppb
2016-05-09	9590-806-1030	6.10 ppb
2016-05-09	9590-807-1030	8.70 ppb
2016-06-01	2104-002-0935	ND
2016-06-01	2104-006-0915	ND
2016-06-01	2104-007-1020	ND
2016-06-01	2104-009-0900	ND
2016-06-01	2104-012-0950	ND
2016-06-01	2104-013-1020	ND
2016-06-01	2104-014-1030	ND
2016-06-01	2104-015-1040	ND
2016-06-01	2104-016-0850	ND
2016-06-01	2104-019-0835	ND
2016-06-01	2104-025-0940	ND
2016-06-01	2104-039-1010	ND
2016-06-01	2104-040-1030	ND
2016-08-08	9590-800-0910	16.0 ppb
2016-08-08	9590-801-0845	30.0 ppb
2016-08-08	9590-802-0900	14.0 ppb
2016-08-08	9590-803-1030	15.0 ppb
2016-08-08	9590-804-1140	14.0 ppb
2016-08-08	9590-805-1045	17.0 ppb
2016-08-08	9590-806-1100	12.0 ppb
2016-08-08	9590-807-0950	10.00 ppb
2016-11-07	9590-800-0835	32.0 ppb
2016-11-07	9590-801-0905	25.0 ppb
2016-11-07	9590-802-0845	20.0 ppb
2016-11-07	9590-803-0840	23.0 ppb
2016-11-07	9590-804-0940	27.0 ppb
2016-11-07	9590-805-0905	24.0 ppb
2016-11-07	9590-806-0910	18.0 ppb
2016-11-07	9590-807-0900	15.0 ppb
2017-02-01	2104-008-0950	ND
2017-02-06	9590-800-0945	21.0 ppb
2017-02-06	9590-801-1035	20.0 ppb
2017-02-06	9590-802-1010	22.0 ppb
2017-02-06	9590-803-1100	20.0 ppb
2017-02-06	9590-804-1400	20.0 ppb
2017-02-06	9590-805-1320	19.0 ppb
2017-02-06	9590-806-1420	20.0 ppb
2017-02-06	9590-807-1130	23.0 ppb
2017-05-08	9590-800-1010	18.0 ppb
2017-05-08	9590-801-0840	14.0 ppb
2017-05-08	9590-802-0900	18.0 ppb
2017-05-08	9590-803-0920	19.0 ppb
2017-05-08	9590-804-0945	14.0 ppb
2017-05-08	9590-805-0920	13.0 ppb
2017-05-08	9590-806-0940	16.0 ppb
2017-05-08	9590-807-0830	12.0 ppb
2017-06-08	2104-006-1115	ND
2017-06-08	2104-007-0920	ND
2017-06-08	2104-008-1145	ND
2017-06-08	2104-009-0945	ND
2017-06-08	2104-012-1120	ND
2017-06-08	2104-013-1030	2.20 ppb
2017-06-08	2104-014-1050	ND
2017-06-08	2104-015-1015	ND
2017-06-08	2104-016-0950	ND
2017-06-08	2104-019-1000	2.30 ppb
2017-06-08	2104-025-1030	ND
2017-06-08	2104-039-0940	ND
2017-08-07	9590-800-0915	22.0 ppb
2017-08-07	9590-801-1015	26.0 ppb
2017-08-07	9590-802-0940	22.0 ppb
2017-08-07	9590-803-1020	17.0 ppb
2017-08-07	9590-804-1320	9.40 ppb
2017-08-07	9590-805-1010	18.0 ppb
2017-08-07	9590-806-1130	9.70 ppb
2017-08-07	9590-807-0900	18.0 ppb
2017-10-04	2104-002-0849	ND
2017-11-13	9590-800-1150	22.0 ppb
2017-11-13	9590-801-1115	22.0 ppb
2017-11-13	9590-802-1135	16.0 ppb
2017-11-13	9590-803-1410	22.0 ppb
2017-11-13	9590-804-1130	15.0 ppb
2017-11-13	9590-805-1200	16.0 ppb
2017-11-13	9590-806-1345	16.0 ppb
2017-11-13	9590-807-1400	12.0 ppb
2017-12-04	2104-040-1345	6.10 ppb
2018-02-05	9590-800-0945	9.80 ppb
2018-02-05	9590-801-1020	12.0 ppb
2018-02-05	9590-802-1000	12.0 ppb
2018-02-05	9590-803-0925	10.00 ppb
2018-02-05	9590-804-1200	9.80 ppb
2018-02-05	9590-805-1050	10.00 ppb
2018-02-05	9590-806-0900	5.60 ppb
2018-02-05	9590-807-0930	8.60 ppb
2018-05-07	9590-800-0845	13.0 ppb
2018-05-07	9590-801-0955	18.0 ppb
2018-05-07	9590-802-0835	7.00 ppb
2018-05-07	9590-803-1125	26.0 ppb
2018-05-07	9590-804-1130	7.00 ppb
2018-05-07	9590-805-1025	9.10 ppb
2018-05-07	9590-806-1110	4.30 ppb
2018-05-07	9590-807-0910	6.00 ppb
2018-06-06	2104-002-1030	ND
2018-06-06	2104-006-1000	ND
2018-06-06	2104-007-0840	ND
2018-06-06	2104-008-1030	ND
2018-06-06	2104-009-1015	ND
2018-06-06	2104-012-1045	ND
2018-06-06	2104-013-0900	ND
2018-06-06	2104-014-0920	ND
2018-06-06	2104-016-1010	ND
2018-06-06	2104-019-0845	ND
2018-06-06	2104-025-1110	ND
2018-06-06	2104-039-0920	ND
2018-06-06	2104-040-0855	1.10 ppb
2018-08-06	9590-800-1115	21.0 ppb
2018-08-06	9590-801-1125	8.70 ppb
2018-08-06	9590-802-1325	5.50 ppb
2018-08-06	9590-803-0845	7.80 ppb
2018-08-06	9590-804-1030	5.80 ppb
2018-08-06	9590-805-1000	7.00 ppb
2018-08-06	9590-806-0930	4.90 ppb
2018-08-06	9590-807-0840	8.70 ppb
2018-11-05	9590-800-1315	16.0 ppb
2018-11-05	9590-801-0945	15.0 ppb
2018-11-05	9590-802-0830	7.20 ppb
2018-11-05	9590-803-1215	10.00 ppb
2018-11-05	9590-804-1130	6.30 ppb
2018-11-05	9590-805-0840	10.00 ppb
2018-11-05	9590-806-1115	6.60 ppb
2018-11-05	9590-807-0700	10.00 ppb
2019-02-19	9590-800-1030	25.0 ppb
2019-02-19	9590-801-1050	13.0 ppb
2019-02-19	9590-802-0950	10.00 ppb
2019-02-19	9590-803-1135	12.0 ppb
2019-02-19	9590-804-1005	3.10 ppb
2019-02-19	9590-805-1200	18.0 ppb
2019-02-19	9590-806-1115	8.20 ppb
2019-02-19	9590-807-0840	1.50 ppb
2019-05-13	9590-800-1030	11.0 ppb
2019-05-13	9590-801-1100	14.0 ppb
2019-05-13	9590-802-1040	12.0 ppb
2019-05-13	9590-803-1200	14.0 ppb
2019-05-13	9590-804-0940	8.60 ppb
2019-05-13	9590-805-0910	12.0 ppb
2019-05-13	9590-806-1130	12.0 ppb
2019-05-13	9590-807-0820	17.0 ppb
2019-06-05	2104-002-1125	ND
2019-06-05	2104-006-1135	ND
2019-06-05	2104-008-1013	ND
2019-06-05	2104-009-0950	ND
2019-06-05	2104-012-1051	ND
2019-06-05	2104-013-0902	ND
2019-06-05	2104-014-0848	ND
2019-06-05	2104-016-0959	ND
2019-06-05	2104-019-0834	ND
2019-06-05	2104-025-1037	ND
2019-06-05	2104-039-0905	ND
2019-06-05	2104-040-0923	ND
2019-08-07	2104-007-0930	2.20 ppb
2019-08-12	9590-800-0810	8.80 ppb
2019-08-12	9590-801-0900	22.0 ppb
2019-08-12	9590-802-0830	11.0 ppb
2019-08-12	9590-803-0745	9.80 ppb
2019-08-12	9590-804-1000	18.0 ppb
2019-08-12	9590-805-1030	10.00 ppb
2019-08-12	9590-806-0930	7.80 ppb
2019-08-12	9590-807-1150	16.0 ppb
2019-11-04	9590-800-0945	16.0 ppb
2019-11-04	9590-801-1015	27.0 ppb
2019-11-04	9590-802-1000	10.00 ppb
2019-11-04	9590-804-0845	9.30 ppb
2019-11-04	9590-805-0910	11.0 ppb
2019-11-04	9590-807-1040	19.0 ppb
2019-11-14	9590-803-0955	9.50 ppb
2019-11-14	9590-806-1020	6.50 ppb