Dibromochloromethane

Blanchard Water System

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

202

Samples

Samples exceeding legal limit (MCL)

174

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	1.89 ppb	42	42	0.570 ppb - 3.80 ppb
2015	1.22 ppb	32	32	0.560 ppb - 2.30 ppb
2016	1.32 ppb	32	32	0.950 ppb - 1.70 ppb
2017	1.97 ppb	32	32	0.380 ppb - 2.90 ppb
2018	0.867 ppb	32	16	ND - 2.70 ppb
2019	1.19 ppb	32	20	ND - 3.10 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
2014-03-07	680-99282-1	2.00 ppb
2014-03-07	680-99282-2	1.50 ppb
2014-03-07	680-99282-3	1.70 ppb
2014-03-07	680-99282-4	1.50 ppb
2014-03-07	680-99282-1	2.00 ppb
2014-03-07	680-99282-2	1.50 ppb
2014-03-07	680-99282-3	1.70 ppb
2014-03-07	680-99282-4	1.50 ppb
2014-04-07	AD90458	1.07 ppb
2014-04-07	AD90458	1.07 ppb
2014-05-05	680-101033-15	2.20 ppb
2014-05-05	680-101033-16	2.20 ppb
2014-05-05	680-101033-17	1.70 ppb
2014-05-05	680-101033-18	2.00 ppb
2014-05-05	680-101033-15	2.20 ppb
2014-05-05	680-101033-16	2.20 ppb
2014-05-05	680-101033-17	1.70 ppb
2014-05-05	680-101033-18	2.00 ppb
2014-06-03	680-102087-15	0.570 ppb
2014-06-03	680-102087-16	0.600 ppb
2014-06-03	680-102087-17	0.620 ppb
2014-06-03	680-102087-18	0.650 ppb
2014-06-03	680-102087-15	0.570 ppb
2014-06-03	680-102087-16	0.600 ppb
2014-06-03	680-102087-17	0.620 ppb
2014-06-03	680-102087-18	0.650 ppb
2014-09-02	680-104983-15	1.80 ppb
2014-09-02	680-104983-16	2.10 ppb
2014-09-02	680-104983-17	2.50 ppb
2014-09-02	680-104983-18	1.40 ppb
2014-09-02	680-104983-15	1.80 ppb
2014-09-02	680-104983-16	2.10 ppb
2014-09-02	680-104983-17	2.50 ppb
2014-09-02	680-104983-18	1.40 ppb
2014-12-02	680-107795-1	3.50 ppb
2014-12-02	680-107795-2	2.70 ppb
2014-12-02	680-107795-3	3.80 ppb
2014-12-02	680-107795-4	3.50 ppb
2014-12-02	680-107795-1	3.50 ppb
2014-12-02	680-107795-2	2.70 ppb
2014-12-02	680-107795-3	3.80 ppb
2014-12-02	680-107795-4	3.50 ppb
2015-03-04	680-110410-6	1.50 ppb
2015-03-04	680-110410-7	1.50 ppb
2015-03-04	680-110410-8	1.20 ppb
2015-03-04	680-110410-9	1.30 ppb
2015-03-04	680-110410-6	1.50 ppb
2015-03-04	680-110410-7	1.50 ppb
2015-03-04	680-110410-8	1.20 ppb
2015-03-04	680-110410-9	1.30 ppb
2015-06-02	680-113293-13	0.680 ppb
2015-06-02	680-113293-14	0.560 ppb
2015-06-02	680-113293-15	0.630 ppb
2015-06-02	680-113293-16	0.590 ppb
2015-06-02	680-113293-13	0.680 ppb
2015-06-02	680-113293-14	0.560 ppb
2015-06-02	680-113293-15	0.630 ppb
2015-06-02	680-113293-16	0.590 ppb
2015-09-01	680-116264-1	2.30 ppb
2015-09-01	680-116264-2	1.90 ppb
2015-09-01	680-116264-3	2.00 ppb
2015-09-01	680-116264-4	2.10 ppb
2015-09-01	680-116264-1	2.30 ppb
2015-09-01	680-116264-2	1.90 ppb
2015-09-01	680-116264-3	2.00 ppb
2015-09-01	680-116264-4	2.10 ppb
2015-12-01	680-119631-13	0.860 ppb
2015-12-01	680-119631-14	0.820 ppb
2015-12-01	680-119631-15	0.750 ppb
2015-12-01	680-119631-16	0.880 ppb
2015-12-01	680-119631-13	0.860 ppb
2015-12-01	680-119631-14	0.820 ppb
2015-12-01	680-119631-15	0.750 ppb
2015-12-01	680-119631-16	0.880 ppb
2016-03-01	680-122612-13	1.10 ppb
2016-03-01	680-122612-14	0.950 ppb
2016-03-01	680-122612-15	1.000 ppb
2016-03-01	680-122612-16	1.10 ppb
2016-03-01	680-122612-13	1.10 ppb
2016-03-01	680-122612-14	0.950 ppb
2016-03-01	680-122612-15	1.000 ppb
2016-03-01	680-122612-16	1.10 ppb
2016-06-07	680-126182-1	1.20 ppb
2016-06-07	680-126182-2	1.10 ppb
2016-06-07	680-126182-3	1.10 ppb
2016-06-07	680-126182-4	1.000 ppb
2016-06-07	680-126182-1	1.20 ppb
2016-06-07	680-126182-2	1.10 ppb
2016-06-07	680-126182-3	1.10 ppb
2016-06-07	680-126182-4	1.000 ppb
2016-09-07	680-129623-10	1.60 ppb
2016-09-07	680-129623-11	1.70 ppb
2016-09-07	680-129623-8	1.60 ppb
2016-09-07	680-129623-9	1.60 ppb
2016-09-07	680-129623-10	1.60 ppb
2016-09-07	680-129623-11	1.70 ppb
2016-09-07	680-129623-8	1.60 ppb
2016-09-07	680-129623-9	1.60 ppb
2016-12-06	680-132880-1	1.50 ppb
2016-12-06	680-132880-2	1.40 ppb
2016-12-06	680-132880-3	1.50 ppb
2016-12-06	680-132880-4	1.70 ppb
2016-12-06	680-132880-1	1.50 ppb
2016-12-06	680-132880-2	1.40 ppb
2016-12-06	680-132880-3	1.50 ppb
2016-12-06	680-132880-4	1.70 ppb
2017-03-09	35300169001	1.90 ppb
2017-03-09	35300169002	1.90 ppb
2017-03-09	35300169003	1.80 ppb
2017-03-09	35300169004	1.70 ppb
2017-03-09	35300169001	1.90 ppb
2017-03-09	35300169002	1.90 ppb
2017-03-09	35300169003	1.80 ppb
2017-03-09	35300169004	1.70 ppb
2017-06-16	35318967009	0.380 ppb
2017-06-16	35318967010	2.20 ppb
2017-06-16	35318967011	1.90 ppb
2017-06-16	35318967012	2.00 ppb
2017-06-16	35318967009	0.380 ppb
2017-06-16	35318967010	2.20 ppb
2017-06-16	35318967011	1.90 ppb
2017-06-16	35318967012	2.00 ppb
2017-09-22	35339070011	2.40 ppb
2017-09-22	35339070012	2.30 ppb
2017-09-22	35339070013	2.20 ppb
2017-09-22	35339070039	1.30 ppb
2017-09-22	35339070011	2.40 ppb
2017-09-22	35339070012	2.30 ppb
2017-09-22	35339070013	2.20 ppb
2017-09-22	35339070039	1.30 ppb
2017-12-20	35364996001	2.90 ppb
2017-12-20	35364996002	2.60 ppb
2017-12-20	35364996003	2.00 ppb
2017-12-20	35364996004	2.00 ppb
2017-12-20	35364996001	2.90 ppb
2017-12-20	35364996002	2.60 ppb
2017-12-20	35364996003	2.00 ppb
2017-12-20	35364996004	2.00 ppb
2018-03-27	35382529001	ND
2018-03-27	35382529002	ND
2018-03-27	35382529003	ND
2018-03-27	35382529004	ND
2018-03-27	35382529001	ND
2018-03-27	35382529002	ND
2018-03-27	35382529003	ND
2018-03-27	35382529004	ND
2018-06-22	35400070001	2.60 ppb
2018-06-22	35400070002	2.70 ppb
2018-06-22	35400070003	2.60 ppb
2018-06-22	35400070004	2.60 ppb
2018-06-22	35400070001	2.60 ppb
2018-06-22	35400070002	2.70 ppb
2018-06-22	35400070003	2.60 ppb
2018-06-22	35400070004	2.60 ppb
2018-09-11	35417283001	ND
2018-09-11	35417283002	ND
2018-09-11	35417283003	ND
2018-09-11	35417283004	ND
2018-09-11	35417283001	ND
2018-09-11	35417283002	ND
2018-09-11	35417283003	ND
2018-09-11	35417283004	ND
2018-12-06	35435843001	0.870 ppb
2018-12-06	35435843002	0.810 ppb
2018-12-06	35435843003	0.820 ppb
2018-12-06	35435843004	0.870 ppb
2018-12-06	35435843001	0.870 ppb
2018-12-06	35435843002	0.810 ppb
2018-12-06	35435843003	0.820 ppb
2018-12-06	35435843004	0.870 ppb
2019-03-01	35451811001	ND
2019-03-01	35451811002	ND
2019-03-01	35451811003	ND
2019-03-01	35451811004	ND
2019-03-01	35451811001	ND
2019-03-01	35451811002	ND
2019-03-01	35451811003	ND
2019-03-01	35451811004	ND
2019-06-20	35477232001	1.50 ppb
2019-06-20	35477232002	1.40 ppb
2019-06-20	35477232003	1.50 ppb
2019-06-20	35477232004	ND
2019-06-20	35477232001	1.50 ppb
2019-06-20	35477232002	1.40 ppb
2019-06-20	35477232003	1.50 ppb
2019-06-20	35477232004	ND
2019-09-18	35499049001	2.30 ppb
2019-09-18	35499049002	2.30 ppb
2019-09-18	35499049003	3.10 ppb
2019-09-18	35499049004	2.70 ppb
2019-09-18	35499049001	2.30 ppb
2019-09-18	35499049002	2.30 ppb
2019-09-18	35499049003	3.10 ppb
2019-09-18	35499049004	2.70 ppb
2019-12-02	35516626001	1.50 ppb
2019-12-02	35516626002	1.40 ppb
2019-12-02	35516626003	ND
2019-12-02	35516626004	1.30 ppb
2019-12-02	35516626001	1.50 ppb
2019-12-02	35516626002	1.40 ppb
2019-12-02	35516626003	ND
2019-12-02	35516626004	1.30 ppb