Dibromochloromethane

City of Billings

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

220

Samples

Samples exceeding legal limit (MCL)

181

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	1.60 ppb	38	25	ND - 5.50 ppb
2015	1.63 ppb	36	27	ND - 2.90 ppb
2016	1.52 ppb	36	25	ND - 3.30 ppb
2017	1.54 ppb	36	35	ND - 2.30 ppb
2018	1.51 ppb	37	33	ND - 2.70 ppb
2019	1.90 ppb	37	36	ND - 3.80 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
2014-02-10	10257526002	2.90 ppb
2014-02-10	10257526003	2.20 ppb
2014-02-10	10257526004	2.40 ppb
2014-02-10	10257526006	3.10 ppb
2014-02-10	B14020492-001F	2.10 ppb
2014-02-11	10257526005	3.20 ppb
2014-02-11	10257526007	2.60 ppb
2014-02-12	10257526001	3.60 ppb
2014-02-12	10257526008	3.20 ppb
2014-05-12	10267141003	ND
2014-05-12	10267141004	ND
2014-05-12	10267141006	ND
2014-05-12	B14051004-001	0.310 ppb
2014-05-12	B14051004-001A	ND
2014-05-13	10267141002	ND
2014-05-13	10267141005	ND
2014-05-13	10267141007	ND
2014-05-14	10267141001	ND
2014-05-14	10267141008	ND
2014-08-11	10277481003	1.000 ppb
2014-08-11	10277481004	ND
2014-08-11	B14081054-001D	0.960 ppb
2014-08-12	10277481005	5.50 ppb
2014-08-12	10277481006	ND
2014-08-12	10277481007	ND
2014-08-13	10277481001	5.40 ppb
2014-08-13	10277481002	5.50 ppb
2014-08-13	10277481008	ND
2014-09-02	B14090072-001A	1.20 ppb
2014-11-12	B14110966-001A	1.60 ppb
2014-11-12	B14110966-002A	1.90 ppb
2014-11-12	B14110966-003A	2.10 ppb
2014-11-12	B14110966-004A	1.90 ppb
2014-11-12	B14110966-005A	1.90 ppb
2014-11-12	B14110966-006A	2.10 ppb
2014-11-12	B14110966-007A	0.990 ppb
2014-11-12	B14110966-008A	1.10 ppb
2014-11-12	B14110966-009A	2.10 ppb
2015-02-09	B15020974-001D	1.60 ppb
2015-02-09	B15020974-002A	2.10 ppb
2015-02-09	B15020974-003A	2.40 ppb
2015-02-09	B15020974-004A	1.70 ppb
2015-02-10	B15020974-005A	2.00 ppb
2015-02-10	B15020974-006A	2.30 ppb
2015-02-10	B15020974-007A	2.20 ppb
2015-02-11	B15020974-008A	2.10 ppb
2015-02-11	B15020974-009A	2.00 ppb
2015-05-11	B15051144-003A	ND
2015-05-11	B15051144-004A	ND
2015-05-11	B15051144-006A	ND
2015-05-11	B15051144-009A	ND
2015-05-12	B15051144-002A	ND
2015-05-12	B15051144-005A	ND
2015-05-12	B15051144-007A	ND
2015-05-13	B15051144-001A	ND
2015-05-13	B15051144-008A	ND
2015-08-10	B15080796-002A	1.50 ppb
2015-08-10	B15080796-004A	2.90 ppb
2015-08-10	B15080796-005A	2.70 ppb
2015-08-10	B15080796-006A	1.80 ppb
2015-08-10	B15080796-007A	2.00 ppb
2015-08-10	B15080796-008A	2.70 ppb
2015-08-10	B15080796-009A	2.80 ppb
2015-08-10	B15080796-010A	2.50 ppb
2015-08-11	B15080910-001A	2.40 ppb
2015-11-09	B15110678-001A	1.40 ppb
2015-11-09	B15110678-002A	2.40 ppb
2015-11-09	B15110678-003A	2.60 ppb
2015-11-09	B15110678-004A	1.60 ppb
2015-11-09	B15110678-005A	1.30 ppb
2015-11-09	B15110678-006A	2.70 ppb
2015-11-09	B15110678-007A	2.30 ppb
2015-11-09	B15110678-008A	1.90 ppb
2015-11-09	B15110678-009A	2.70 ppb
2016-02-08	B16020890-001D	2.00 ppb
2016-02-08	B16020890-004A	2.20 ppb
2016-02-08	B16020890-005A	1.60 ppb
2016-02-08	B16020890-007A	2.80 ppb
2016-02-09	B16020890-003A	3.00 ppb
2016-02-09	B16020890-006A	2.80 ppb
2016-02-09	B16020890-008A	2.60 ppb
2016-02-10	B16020890-002A	2.90 ppb
2016-02-10	B16020890-009A	3.30 ppb
2016-05-09	B16051069-005A	ND
2016-05-10	B16051069-001A	ND
2016-05-10	B16051069-003A	0.720 ppb
2016-05-11	B16051069-002A	ND
2016-05-11	B16051069-009A	ND
2016-05-26	B16052073-001A	ND
2016-05-26	B16052073-002A	ND
2016-05-26	B16052073-003A	ND
2016-05-26	B16052073-004A	ND
2016-08-08	B16081057-001A	1.90 ppb
2016-08-08	B16081057-002A	2.20 ppb
2016-08-08	B16081057-003A	3.00 ppb
2016-08-08	B16081057-004A	2.00 ppb
2016-08-09	B16081057-005A	3.20 ppb
2016-08-09	B16081057-006A	3.10 ppb
2016-08-09	B16081057-007A	2.70 ppb
2016-08-10	B16081057-008A	2.80 ppb
2016-08-10	B16081057-009A	3.10 ppb
2016-11-09	B16110820-001A	0.640 ppb
2016-11-09	B16110820-002A	ND
2016-11-09	B16110820-003A	2.00 ppb
2016-11-09	B16110820-004A	0.630 ppb
2016-11-09	B16110820-005A	0.710 ppb
2016-11-09	B16110820-006A	2.10 ppb
2016-11-09	B16110820-007A	ND
2016-11-09	B16110820-008A	0.830 ppb
2016-11-09	B16110820-009A	ND
2017-02-06	B17020497-005A	1.80 ppb
2017-02-06	B17020497-006A	1.60 ppb
2017-02-06	B17020497-008A	1.90 ppb
2017-02-07	B17020497-004A	2.20 ppb
2017-02-07	B17020497-007A	2.20 ppb
2017-02-07	B17020497-009A	1.90 ppb
2017-02-08	B17020497-002D	1.40 ppb
2017-02-08	B17020497-003A	2.10 ppb
2017-02-08	B17020497-010A	2.30 ppb
2017-05-08	B17051019-001D	ND
2017-05-08	B17051019-002A	0.860 ppb
2017-05-08	B17051019-003A	0.790 ppb
2017-05-08	B17051019-004A	0.960 ppb
2017-05-09	B17051019-005A	1.000 ppb
2017-05-09	B17051019-006A	0.760 ppb
2017-05-09	B17051019-007A	0.700 ppb
2017-05-10	B17051019-008A	0.700 ppb
2017-05-10	B17051019-009A	1.000 ppb
2017-08-07	B17081099-001D	1.000 ppb
2017-08-07	B17081099-004A	1.50 ppb
2017-08-07	B17081099-005A	1.90 ppb
2017-08-07	B17081099-007A	1.60 ppb
2017-08-08	B17081099-003A	1.50 ppb
2017-08-08	B17081099-006A	2.00 ppb
2017-08-08	B17081099-008A	1.70 ppb
2017-08-09	B17081099-002A	1.90 ppb
2017-08-09	B17081099-009A	2.10 ppb
2017-11-06	B17110842-001A	1.30 ppb
2017-11-06	B17110842-002A	1.50 ppb
2017-11-06	B17110842-003A	1.90 ppb
2017-11-07	B17110842-004A	2.00 ppb
2017-11-07	B17110842-005A	1.70 ppb
2017-11-08	B17110842-006A	2.00 ppb
2017-11-08	B17110842-007A	1.80 ppb
2017-11-08	B17110842-008A	2.00 ppb
2017-11-09	B17110842-009A	2.00 ppb
2018-02-05	B18020545-001F	1.50 ppb
2018-02-05	B18020545-004A	2.30 ppb
2018-02-05	B18020545-005A	1.80 ppb
2018-02-06	B18020545-006A	2.60 ppb
2018-02-06	B18020545-007A	2.50 ppb
2018-02-06	B18020545-008A	2.00 ppb
2018-02-06	B18020545-009A	2.50 ppb
2018-02-07	B18020545-010A	2.30 ppb
2018-02-07	B18020545-011A	2.70 ppb
2018-05-07	B18051134-001F	ND
2018-05-07	B18051134-003A	0.510 ppb
2018-05-07	B18051134-004A	0.560 ppb
2018-05-08	B18051134-005A	1.60 ppb
2018-05-08	B18051134-006A	0.740 ppb
2018-05-08	B18051134-007A	0.910 ppb
2018-05-08	B18051134-008A	0.920 ppb
2018-05-09	B18051134-009A	0.580 ppb
2018-05-09	B18051134-010A	ND
2018-05-09	B18051134-011A	ND
2018-08-06	B18080949-001F	1.10 ppb
2018-08-06	B18080949-002E	ND
2018-08-06	B18080949-003A	1.30 ppb
2018-08-06	B18080949-004A	1.30 ppb
2018-08-07	B18080949-005A	1.60 ppb
2018-08-07	B18080949-006A	1.60 ppb
2018-08-07	B18080949-007A	1.40 ppb
2018-08-08	B18080949-008A	1.50 ppb
2018-08-08	B18080949-009A	1.20 ppb
2018-08-08	B18080949-010A	1.30 ppb
2018-11-07	B18110767-003A	2.20 ppb
2018-11-07	B18110767-004A	2.20 ppb
2018-11-07	B18110767-005A	2.40 ppb
2018-11-07	B18110767-006A	2.10 ppb
2018-11-07	B18110767-007A	1.50 ppb
2018-11-08	B18110767-008A	2.30 ppb
2018-11-08	B18110767-009A	2.30 ppb
2018-11-08	B18110767-010A	2.40 ppb
2019-02-11	B19020608-001F	2.50 ppb
2019-02-11	B19020608-002A	3.10 ppb
2019-02-11	B19020608-003A	3.60 ppb
2019-02-11	B19020608-004A	3.10 ppb
2019-02-11	B19020608-005A	3.20 ppb
2019-02-11	B19020608-006A	3.80 ppb
2019-02-11	B19020608-007A	3.50 ppb
2019-02-11	B19020608-008A	3.30 ppb
2019-02-11	B19020608-009A	3.50 ppb
2019-05-13	B19051523-001A	0.610 ppb
2019-05-13	B19051523-004A	0.640 ppb
2019-05-13	B19051523-009A	0.880 ppb
2019-05-14	B19051523-003A	0.960 ppb
2019-05-14	B19051523-006A	1.000 ppb
2019-05-14	B19051523-008A	0.750 ppb
2019-05-15	B19051523-002A	0.730 ppb
2019-05-15	B19051523-005A	0.800 ppb
2019-05-15	B19051523-007A	0.760 ppb
2019-08-12	B19081432-001A	1.000 ppb
2019-08-12	B19081432-004A	1.30 ppb
2019-08-12	B19081432-009A	1.40 ppb
2019-08-13	B19081432-003A	1.70 ppb
2019-08-13	B19081432-006A	1.60 ppb
2019-08-13	B19081432-008A	1.40 ppb
2019-08-14	B19081432-002A	1.50 ppb
2019-08-14	B19081432-005A	1.40 ppb
2019-08-14	B19081432-007A	1.30 ppb
2019-11-13	B19111116-001A	1.50 ppb
2019-11-13	B19111116-002A	ND
2019-11-13	B19111116-003A	2.60 ppb
2019-11-13	B19111116-004A	2.90 ppb
2019-11-13	B19111116-005A	1.80 ppb
2019-11-13	B19111116-006A	2.00 ppb
2019-11-13	B19111116-007A	2.50 ppb
2019-11-13	B19111116-008A	2.60 ppb
2019-11-13	B19111116-009A	2.50 ppb
2019-11-13	B19111116-010A	2.50 ppb