Bromodichloromethane

Municipality of Anchorage

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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

194

Samples

Samples exceeding legal limit (MCL)

109

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.627 ppb	32	27	ND - 1.13 ppb
2015	0.670 ppb	32	26	ND - 1.45 ppb
2016	0.1000 ppb	34	4	ND - 1.10 ppb
2017	0.226 ppb	34	13	ND - 0.800 ppb
2018	0.400 ppb	26	16	ND - 1.000 ppb
2019	0.406 ppb	36	23	ND - 1.000 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-01-21	DT*A1401256-08A	0.660 ppb
2014-01-21	DT*A1401256-11A	0.630 ppb
2014-01-23	DT*A1401256-03A	ND
2014-01-23	DT*A1401256-05A	ND
2014-01-23	DT*A1401256-06A	0.620 ppb
2014-01-23	DT*A1401256-07A	0.960 ppb
2014-01-23	DT*A1401256-09A	0.750 ppb
2014-01-23	DT*A1401256-10A	0.610 ppb
2014-04-15	DT*A1404326-03A	ND
2014-04-15	DT*A1404326-04A	0.600 ppb
2014-04-15	DT*A1404326-05A	0.750 ppb
2014-04-15	DT*A1404326-07A	0.820 ppb
2014-04-15	DT*A1404326-08A	0.730 ppb
2014-04-15	DT*A1404326-09A	0.590 ppb
2014-04-15	DT*A1404326-10A	0.940 ppb
2014-04-15	DT*A1404326-11A	0.970 ppb
2014-07-24	DT*A1407502-03A	0.550 ppb
2014-07-24	DT*A1407502-05A	ND
2014-07-24	DT*A1407502-06A	0.710 ppb
2014-07-24	DT*A1407502-07A	1.13 ppb
2014-07-24	DT*A1407502-08A	0.760 ppb
2014-07-24	DT*A1407502-09A	0.970 ppb
2014-07-24	DT*A1407502-10A	0.690 ppb
2014-07-24	DT*A1407502-11A	0.700 ppb
2014-10-20	DT*A1410342-08A	0.650 ppb
2014-10-20	DT*A1410342-11A	0.760 ppb
2014-10-21	DT*A1410342-15A	ND
2014-10-21	DT*A1410342-16A	0.630 ppb
2014-10-21	DT*A1410342-17A	0.640 ppb
2014-10-21	DT*A1410342-18A	0.800 ppb
2014-10-21	DT*A1410342-19A	0.600 ppb
2014-10-21	DT*A1410342-20A	0.850 ppb
2015-01-21	DT*A1501311-03A	0.550 ppb
2015-01-21	DT*A1501311-05A	0.840 ppb
2015-01-21	DT*A1501311-06A	0.750 ppb
2015-01-21	DT*A1501311-07A	1.20 ppb
2015-01-21	DT*A1501311-09A	1.15 ppb
2015-01-21	DT*A1501311-10A	1.45 ppb
2015-01-23	DT*A1502139-01A	1.04 ppb
2015-01-23	DT*A1502139-02A	ND
2015-04-15	DT*1151497001	0.850 ppb
2015-04-15	DT*1151497002	0.730 ppb
2015-04-27	DT*1151677001	ND
2015-04-27	DT*1151683001	0.520 ppb
2015-04-27	DT*1151683002	1.01 ppb
2015-04-27	DT*1151683003	0.630 ppb
2015-04-27	DT*1151683004	0.550 ppb
2015-04-29	DT*1151757001	ND
2015-07-06	DT*1153431002	0.510 ppb
2015-07-06	DT*1153431003	1.19 ppb
2015-07-06	DT*1153431004	0.700 ppb
2015-07-06	DT*1153431005	0.900 ppb
2015-07-06	DT*1153431006	0.800 ppb
2015-07-06	DT*1153431007	ND
2015-07-07	DT*1153478001	0.580 ppb
2015-07-07	DT*1153478002	1.06 ppb
2015-10-19	DT*1156221001	0.920 ppb
2015-10-19	DT*1156221002	0.700 ppb
2015-10-21	2T*3345891	ND
2015-10-21	DT*3345863	ND
2015-10-21	DT*3345893	0.700 ppb
2015-10-21	DT*3345895	0.800 ppb
2015-10-21	DT*3345897	0.700 ppb
2015-10-21	DT*3345899	0.600 ppb
2016-01-19	DT*280-79112-1	ND
2016-01-19	DT*280-79112-2	ND
2016-01-19	DT*280-79112-3	ND
2016-01-19	DT*280-79113-1	ND
2016-01-20	DT*280-79144-1	ND
2016-01-20	DT*280-79144-2	ND
2016-01-20	DT*280-79144-3	ND
2016-01-20	DT*280-79144-4	ND
2016-04-05	DT*3426766	ND
2016-04-06	DT*280-81769-1	ND
2016-04-06	DT*280-81769-2	ND
2016-04-06	DT*280-81769-3	ND
2016-04-06	DT*280-81769-4	ND
2016-04-06	DT*280-81769-5	ND
2016-04-06	DT*280-81769-6	ND
2016-04-06	DT*280-81769-7	ND
2016-07-05	DT*280-85351-1	ND
2016-07-05	DT*280-85352-1	ND
2016-07-05	DT*280-85352-2	ND
2016-07-05	DT*280-85352-3	ND
2016-07-06	DT*280-85379-1	ND
2016-07-06	DT*280-85379-2	ND
2016-07-06	DT*280-85379-3	ND
2016-07-06	DT*280-85379-4	ND
2016-07-21	DT*280-86083-1	ND
2016-10-03	DT*280-89295-1	ND
2016-10-03	DT*280-89295-2	1.10 ppb
2016-10-03	DT*280-89295-4	ND
2016-10-04	DT*280-89297-1	ND
2016-10-24	DT*3572277	0.600 ppb
2016-10-24	DT*3572279	ND
2016-10-24	DT*3572282	ND
2016-10-24	DT*3572284	1.10 ppb
2016-10-24	DT*3572286	0.600 ppb
2017-01-18	DT*3624237	ND
2017-01-18	DT*3624244	ND
2017-01-19	DT*440-174639-1	ND
2017-01-27	DT*440-175162-1	ND
2017-01-27	DT*440-175162-2	ND
2017-01-27	DT*440-175162-3	ND
2017-01-27	DT*440-175162-4	ND
2017-01-27	DT*440-175162-5	ND
2017-01-27	DT*440-175162-6	ND
2017-04-11	DT*3673683	ND
2017-04-11	DT*3673685	ND
2017-04-11	DT*3673688	ND
2017-04-12	DT*3674403	ND
2017-04-12	DT*3674406	0.500 ppb
2017-04-19	DT*3679090	ND
2017-04-19	DT*3679092	0.500 ppb
2017-04-19	DT*3679094	ND
2017-04-19	DT*3679096	0.800 ppb
2017-08-16	DT*3760865	ND
2017-08-16	DT*3760931	ND
2017-08-16	DT*3760933	0.500 ppb
2017-08-16	DT*3760935	0.700 ppb
2017-08-16	DT*3760937	0.600 ppb
2017-08-16	DT*3760939	0.600 ppb
2017-08-16	DT*3760941	0.500 ppb
2017-08-16	DT*3760945	0.700 ppb
2017-10-10	DT*3798280	ND
2017-10-10	DT*3798282	ND
2017-10-24	DT*3808046	ND
2017-10-24	DT*3808049	0.600 ppb
2017-10-25	DT*3808961	ND
2017-10-25	DT*3808964	0.600 ppb
2017-10-25	DT*3808966	0.500 ppb
2017-10-25	DT*3808968	0.600 ppb
2018-04-17	DT*3917690	ND
2018-04-17	DT*3917725	ND
2018-04-17	DT*3917727	ND
2018-04-24	DT*3922166	0.600 ppb
2018-04-24	DT*3922170	0.500 ppb
2018-04-24	DT*3922172	0.500 ppb
2018-04-24	DT*3922174	ND
2018-04-24	DT*3922176	ND
2018-04-24	DT*3922168	ND
2018-07-09	DT*3990794	0.700 ppb
2018-07-09	DT*3990795	0.500 ppb
2018-07-11	DT*3996972	1.000 ppb
2018-07-11	DT*3996974	0.700 ppb
2018-07-11	DT*3996976	0.800 ppb
2018-07-11	DT*3996968	0.600 ppb
2018-07-11	DT*3996970	0.900 ppb
2018-07-11	DT*3996966	0.700 ppb
2018-10-09	DT*4087185	0.600 ppb
2018-10-09	DT*4087186	0.500 ppb
2018-10-15	DT*4093137	ND
2018-10-15	DT*4093145	ND
2018-10-15	DT*4093147	ND
2018-10-15	DT*4093034	ND
2018-10-16	DT*4093139	0.500 ppb
2018-10-16	DT*4093141	0.700 ppb
2018-10-16	DT*4093143	0.600 ppb
2019-01-15	4177408	0.500 ppb
2019-01-15	4177409	ND
2019-01-15	4177411	0.600 ppb
2019-01-17	4180841	ND
2019-01-17	4180842	0.500 ppb
2019-01-17	4180843	0.500 ppb
2019-01-17	4180844	0.500 ppb
2019-01-17	4180845	0.500 ppb
2019-01-29	X680-163919-3	ND
2019-04-21	4273197	0.700 ppb
2019-04-22	4273191	1.000 ppb
2019-04-22	4273201	0.700 ppb
2019-04-22	4273203	ND
2019-04-22	4273205	0.800 ppb
2019-04-22	4273238	ND
2019-04-23	4273193	0.500 ppb
2019-04-23	4273195	0.700 ppb
2019-04-23	4273199	0.700 ppb
2019-07-08	440-245534-3	ND
2019-07-11	4353567	0.500 ppb
2019-07-11	4353569	0.500 ppb
2019-07-11	4353571	0.700 ppb
2019-07-11	4353574	0.900 ppb
2019-07-11	4353576	ND
2019-07-11	4353578	0.800 ppb
2019-07-16	440-246201-1	ND
2019-07-16	440-246201-2	ND
2019-10-15	X440-252668-6	ND
2019-10-23	4466985	0.600 ppb
2019-10-23	4466987	0.600 ppb
2019-10-23	4466989	ND
2019-10-23	4466991	ND
2019-10-29	ARS3-19-03484-00	0.600 ppb
2019-10-29	ARS3-19-03484-00	0.600 ppb
2019-10-29	ARS3-19-03484-00	0.600 ppb
2019-10-29	ARS3-19-03484-00	ND