Dibromochloromethane

Huntsville Utilities

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	0.191 ppb	16	4	ND - 0.950 ppb
2015	0.460 ppb	16	4	ND - 4.40 ppb
2016	0.381 ppb	16	5	ND - 2.14 ppb
2017	0.218 ppb	19	4	ND - 1.34 ppb
2018	0.270 ppb	17	4	ND - 1.47 ppb
2019	0.0386 ppb	14	1	ND - 0.540 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
2014-01-23	140123033-4	0.770 ppb
2014-01-23	140123033-2	ND
2014-01-23	140123033-1	ND
2014-01-23	140123033-3	ND
2014-04-03	140403063-2	ND
2014-04-03	140403063-1	ND
2014-04-03	140403063-3	ND
2014-07-16	140716061-5	ND
2014-07-16	140716061-2	ND
2014-07-16	140716061-1	ND
2014-07-16	140716061-4	0.630 ppb
2014-07-16	140716061-3	ND
2014-12-05	141205071-1	ND
2014-12-05	141205071-3	0.700 ppb
2014-12-05	141205071-2	ND
2014-12-05	141205071-4	0.950 ppb
2015-03-04	150304064-1	ND
2015-03-04	150304064-2	ND
2015-03-04	150304064-3	0.760 ppb
2015-03-04	150304064-4	1.45 ppb
2015-06-18	150618047-3	ND
2015-06-18	150618047-1	ND
2015-06-18	150618047-2	ND
2015-07-21	150721025-5	0.750 ppb
2015-07-21	150721025-1	ND
2015-07-21	150721025-2	ND
2015-07-21	150721025-3	ND
2015-07-21	150721025-4	ND
2015-10-15	151020032-1	4.40 ppb
2015-10-22	151022023-1	ND
2015-10-22	151022023-3	ND
2015-10-22	151022023-2	ND
2016-01-11	160111042-4	0.730 ppb
2016-01-11	160111042-3	ND
2016-01-11	160111042-1	ND
2016-01-11	160111042-2	ND
2016-04-19	160419012-003	ND
2016-04-19	160410012-1	ND
2016-04-19	160419012-002	ND
2016-09-08	160908050-5	1.67 ppb
2016-09-08	160908050-4	ND
2016-09-08	160908050-3	0.530 ppb
2016-09-08	160908050-2	ND
2016-09-08	160908050-1	ND
2016-12-01	161201071-2	2.14 ppb
2016-12-01	161201071-1	ND
2016-12-01	161201071-3	1.03 ppb
2016-12-20	161220038-1	ND
2017-03-06	170306053-4	1.34 ppb
2017-03-06	170306053-3	0.870 ppb
2017-03-06	170306053-1	ND
2017-03-06	170306053-2	ND
2017-06-12	170612025-1	0.690 ppb
2017-06-15	170615042-3	ND
2017-06-15	170615042-1	ND
2017-06-15	170615042-2	ND
2017-09-07	170907096-4	1.25 ppb
2017-09-07	170907096-1	ND
2017-09-07	170907096-2	ND
2017-09-07	170907096-5	ND
2017-09-07	170907096-3	ND
2017-09-14	170914045-1	ND
2017-11-09	171109043-1	ND
2017-11-09	171109043-4	ND
2017-11-09	171109043-004	ND
2017-11-09	171109043-2	ND
2017-11-09	171109043-3	ND
2018-03-23	180323033-2	ND
2018-03-23	180323033-3	ND
2018-03-23	180323033-1	ND
2018-03-23	180323033-4	0.820 ppb
2018-03-23	180323033-5	1.40 ppb
2018-05-03	180503023-1	ND
2018-05-03	180503023-2	ND
2018-05-03	180503023-3	ND
2018-08-02	18080066-004A	0.900 ppb
2018-08-02	18080066-001A	ND
2018-08-02	18080066-002A	ND
2018-08-02	18080066-005A	ND
2018-08-02	18080066-003A	ND
2018-08-30	18080781-001A	1.47 ppb
2018-11-01	18110004-001A	ND
2018-11-01	18110004-003A	ND
2018-11-01	18110004-002A	ND
2019-01-31	19010741-003A	0.540 ppb
2019-01-31	19010741-004A	ND
2019-01-31	19010741-005A	ND
2019-01-31	19010741-002A	ND
2019-01-31	19010741-001A	ND
2019-05-02	19050055-001A	ND
2019-05-02	19050055-002A	ND
2019-05-02	19050055-003A	ND
2019-08-01	20115133004_IVOC	ND
2019-08-01	20115133003_IVOC	ND
2019-08-01	20115133006_IVOC	ND
2019-08-01	20115133002_IVOC	ND
2019-08-01	20115133001_IVOC	ND
2019-11-19	20131208004_IVOC	ND