Bromodichloromethane

Golden State Water Company (GSWC) - Southwest

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

268

Samples

Samples exceeding legal limit (MCL)

223

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	7.12 ppb	46	31	ND - 26.0 ppb
2015	7.43 ppb	43	32	ND - 17.0 ppb
2016	5.15 ppb	51	32	ND - 15.0 ppb
2017	6.05 ppb	32	32	2.00 ppb - 18.0 ppb
2018	6.31 ppb	48	48	1.60 ppb - 20.0 ppb
2019	4.27 ppb	48	48	1.50 ppb - 9.40 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
2014-03-11	2706-005-1052	ND
2014-03-11	2706-010-0705	ND
2014-03-11	2706-011-1213	ND
2014-03-11	2706-036-1055	ND
2014-03-11	2706-037-1115	ND
2014-03-11	2706-038-1122	ND
2014-03-11	2706-039-1015	ND
2014-03-11	2706-043-1200	ND
2014-03-11	2706-045-1100	ND
2014-03-11	2706-061-0824	ND
2014-03-11	2706-062-0815	1.10 ppb
2014-03-11	2706-064-0934	ND
2014-03-11	2706-069-1130	ND
2014-03-12	2706-800-1105	20.0 ppb
2014-03-12	2706-801-0900	9.30 ppb
2014-03-12	2706-802-1030	10.00 ppb
2014-03-12	2706-803-0930	1.90 ppb
2014-03-12	2706-804-1130	20.0 ppb
2014-03-12	2706-805-1005	10.00 ppb
2014-03-12	2706-806-1155	15.0 ppb
2014-03-12	2706-807-1235	7.30 ppb
2014-05-19	2706-070-1300	ND
2014-06-11	2706-800-1150	21.0 ppb
2014-06-11	2706-801-0920	13.0 ppb
2014-06-11	2706-802-1030	13.0 ppb
2014-06-11	2706-803-0945	ND
2014-06-11	2706-804-1105	15.0 ppb
2014-06-11	2706-805-1010	3.30 ppb
2014-06-11	2706-806-1125	12.0 ppb
2014-06-11	2706-807-1230	12.0 ppb
2014-09-10	2706-800-1035	26.0 ppb
2014-09-10	2706-801-0900	12.0 ppb
2014-09-10	2706-802-0955	13.0 ppb
2014-09-10	2706-803-0840	ND
2014-09-10	2706-804-1100	12.0 ppb
2014-09-10	2706-805-0935	1.60 ppb
2014-09-10	2706-806-1120	12.0 ppb
2014-09-10	2706-807-1140	11.0 ppb
2014-12-10	2706-800-1105	8.80 ppb
2014-12-10	2706-801-1230	11.0 ppb
2014-12-10	2706-802-1150	4.10 ppb
2014-12-10	2706-803-1215	1.70 ppb
2014-12-10	2706-804-1030	11.0 ppb
2014-12-10	2706-805-1135	4.50 ppb
2014-12-10	2706-806-1045	9.40 ppb
2014-12-10	2706-807-1000	5.70 ppb
2015-03-10	2706-010-1018	ND
2015-03-10	2706-011-0720	ND
2015-03-10	2706-036-0756	ND
2015-03-10	2706-038-0735	ND
2015-03-10	2706-039-0820	ND
2015-03-10	2706-043-0924	ND
2015-03-10	2706-045-0838	ND
2015-03-10	2706-064-0915	ND
2015-03-10	2706-069-0935	ND
2015-03-10	2706-800-1115	8.90 ppb
2015-03-10	2706-801-1000	13.0 ppb
2015-03-10	2706-802-1050	10.00 ppb
2015-03-10	2706-803-0940	4.50 ppb
2015-03-10	2706-804-1135	11.0 ppb
2015-03-10	2706-805-1025	2.10 ppb
2015-03-10	2706-806-1150	8.80 ppb
2015-03-10	2706-807-1230	9.70 ppb
2015-06-09	2706-800-1135	15.0 ppb
2015-06-09	2706-801-0922	12.0 ppb
2015-06-09	2706-802-1030	14.0 ppb
2015-06-09	2706-803-0935	12.0 ppb
2015-06-09	2706-804-1150	15.0 ppb
2015-06-09	2706-805-1010	14.0 ppb
2015-06-09	2706-806-1210	17.0 ppb
2015-06-09	2706-807-1310	11.0 ppb
2015-09-11	2706-800-1140	9.60 ppb
2015-09-11	2706-801-1000	13.0 ppb
2015-09-11	2706-802-1110	9.30 ppb
2015-09-11	2706-803-1030	10.00 ppb
2015-09-11	2706-804-1200	10.00 ppb
2015-09-11	2706-805-1050	8.90 ppb
2015-09-11	2706-806-1220	10.00 ppb
2015-09-11	2706-807-0930	11.0 ppb
2015-09-25	2706-037-0940	ND
2015-12-08	2706-800-1055	6.80 ppb
2015-12-08	2706-801-1300	9.40 ppb
2015-12-08	2706-802-1130	6.50 ppb
2015-12-08	2706-803-1230	8.10 ppb
2015-12-08	2706-804-1030	7.10 ppb
2015-12-08	2706-805-1200	6.90 ppb
2015-12-08	2706-806-1010	6.90 ppb
2015-12-08	2706-807-1330	7.90 ppb
2015-12-30	2706-070-1318	ND
2016-03-08	2706-800-1115	6.20 ppb
2016-03-08	2706-801-1300	6.30 ppb
2016-03-08	2706-802-1200	6.70 ppb
2016-03-08	2706-803-1240	3.30 ppb
2016-03-08	2706-804-1040	5.70 ppb
2016-03-08	2706-805-1140	6.50 ppb
2016-03-08	2706-806-1055	5.70 ppb
2016-03-08	2706-807-1020	6.00 ppb
2016-03-10	2706-036-0851	ND
2016-03-10	2706-037-0955	ND
2016-03-10	2706-038-1004	ND
2016-03-10	2706-070-0955	ND
2016-03-31	2706-011-1340	ND
2016-04-27	2706-039-1030	ND
2016-04-28	2706-043-1000	ND
2016-05-04	2706-064-0815	ND
2016-05-05	2706-005-1010	ND
2016-05-11	2706-069-0820	ND
2016-05-18	2706-010-0858	ND
2016-05-19	2706-045-1130	ND
2016-05-25	2706-061-1120	ND
2016-05-26	2706-062-0945	ND
2016-06-08	2706-800-1010	8.70 ppb
2016-06-08	2706-801-1210	12.0 ppb
2016-06-08	2706-802-1050	8.50 ppb
2016-06-08	2706-803-1150	11.0 ppb
2016-06-08	2706-804-0925	9.60 ppb
2016-06-08	2706-805-1035	8.40 ppb
2016-06-08	2706-806-0944	8.70 ppb
2016-06-08	2706-807-0857	15.0 ppb
2016-07-07	2706-064-0725	ND
2016-07-13	2706-039-0901	ND
2016-09-14	2706-800-1040	7.60 ppb
2016-09-14	2706-801-1200	11.0 ppb
2016-09-14	2706-802-1110	6.60 ppb
2016-09-14	2706-803-1130	12.0 ppb
2016-09-14	2706-804-1005	10.00 ppb
2016-09-14	2706-805-1100	6.00 ppb
2016-09-14	2706-806-1020	7.00 ppb
2016-09-14	2706-807-0940	9.40 ppb
2016-09-22	2706-043-0845	ND
2016-09-22	2706-045-1015	ND
2016-09-22	2706-069-0820	ND
2016-12-13	2706-800-1015	9.10 ppb
2016-12-13	2706-801-1010	12.0 ppb
2016-12-13	2706-802-1210	12.0 ppb
2016-12-13	2706-803-1045	7.10 ppb
2016-12-13	2706-804-1030	5.60 ppb
2016-12-13	2706-805-1125	3.90 ppb
2016-12-13	2706-806-1045	7.70 ppb
2016-12-13	2706-807-1113	7.60 ppb
2017-03-08	9590-800-1130	7.30 ppb
2017-03-08	9590-801-0930	18.0 ppb
2017-03-08	9590-802-1045	3.50 ppb
2017-03-08	9590-803-0945	2.20 ppb
2017-03-08	9590-804-1205	5.60 ppb
2017-03-08	9590-805-1020	5.00 ppb
2017-03-08	9590-806-1235	11.0 ppb
2017-03-08	9590-807-1305	6.70 ppb
2017-09-12	9590-800-1125	4.30 ppb
2017-09-12	9590-801-1250	15.0 ppb
2017-09-12	9590-802-1205	3.40 ppb
2017-09-12	9590-803-1330	8.90 ppb
2017-09-12	9590-804-1045	4.00 ppb
2017-09-12	9590-805-1150	2.00 ppb
2017-09-12	9590-806-1105	3.50 ppb
2017-09-12	9590-807-1000	6.60 ppb
2017-09-12	9590-808-1230	6.50 ppb
2017-09-12	9590-809-1315	6.80 ppb
2017-09-12	9590-810-1355	3.60 ppb
2017-09-12	9590-811-1020	4.70 ppb
2017-12-12	9590-800-1050	17.0 ppb
2017-12-12	9590-801-1110	4.50 ppb
2017-12-12	9590-802-1150	4.00 ppb
2017-12-12	9590-803-1230	3.70 ppb
2017-12-12	9590-804-1005	3.80 ppb
2017-12-12	9590-805-1115	3.80 ppb
2017-12-12	9590-806-1025	3.80 ppb
2017-12-12	9590-807-0940	3.70 ppb
2017-12-12	9590-808-1025	3.00 ppb
2017-12-12	9590-809-1000	4.20 ppb
2017-12-12	9590-810-1305	9.50 ppb
2017-12-12	9590-811-1335	4.10 ppb
2018-03-13	9590-800-1145	9.30 ppb
2018-03-13	9590-801-1230	7.10 ppb
2018-03-13	9590-802-1205	6.80 ppb
2018-03-13	9590-803-0945	1.60 ppb
2018-03-13	9590-804-1130	6.40 ppb
2018-03-13	9590-805-1155	6.90 ppb
2018-03-13	9590-806-1110	6.70 ppb
2018-03-13	9590-807-1035	6.70 ppb
2018-03-13	9590-808-1250	2.00 ppb
2018-03-13	9590-809-1310	5.00 ppb
2018-03-13	9590-810-1325	9.20 ppb
2018-03-13	9590-811-1345	6.30 ppb
2018-06-12	9590-800-1300	7.40 ppb
2018-06-12	9590-801-1345	8.30 ppb
2018-06-12	9590-802-1140	6.80 ppb
2018-06-12	9590-803-1050	7.10 ppb
2018-06-12	9590-804-1245	6.20 ppb
2018-06-12	9590-805-1115	6.90 ppb
2018-06-12	9590-806-1300	6.70 ppb
2018-06-12	9590-807-1340	5.20 ppb
2018-06-12	9590-808-0925	7.60 ppb
2018-06-12	9590-809-0950	6.70 ppb
2018-06-12	9590-810-1015	20.0 ppb
2018-06-12	9590-811-1215	5.80 ppb
2018-09-11	9590-800-1120	5.10 ppb
2018-09-11	9590-801-1310	7.20 ppb
2018-09-11	9590-802-1210	6.30 ppb
2018-09-11	9590-803-1415	4.20 ppb
2018-09-11	9590-804-1045	5.30 ppb
2018-09-11	9590-805-1145	6.80 ppb
2018-09-11	9590-806-1025	5.30 ppb
2018-09-11	9590-807-0935	4.00 ppb
2018-09-11	9590-808-1245	6.10 ppb
2018-09-11	9590-809-1350	4.60 ppb
2018-09-11	9590-810-1445	4.20 ppb
2018-09-11	9590-811-1000	3.90 ppb
2018-12-11	9590-800-1150	5.20 ppb
2018-12-11	9590-801-1400	7.80 ppb
2018-12-11	9590-802-1250	6.50 ppb
2018-12-11	9590-803-1330	5.00 ppb
2018-12-11	9590-804-1045	6.20 ppb
2018-12-11	9590-805-1220	3.30 ppb
2018-12-11	9590-806-1125	6.50 ppb
2018-12-11	9590-807-1000	6.00 ppb
2018-12-11	9590-808-1545	4.70 ppb
2018-12-11	9590-809-1530	6.70 ppb
2018-12-11	9590-810-1515	6.30 ppb
2018-12-11	9590-811-1450	6.80 ppb
2019-03-12	9590-800-1210	6.80 ppb
2019-03-12	9590-801-0900	8.40 ppb
2019-03-12	9590-802-1300	6.20 ppb
2019-03-12	9590-803-1000	4.50 ppb
2019-03-12	9590-804-1150	7.30 ppb
2019-03-12	9590-805-1235	7.90 ppb
2019-03-12	9590-806-1130	6.70 ppb
2019-03-12	9590-807-1330	6.20 ppb
2019-03-12	9590-808-0825	3.00 ppb
2019-03-12	9590-809-0925	2.30 ppb
2019-03-12	9590-810-1050	6.20 ppb
2019-03-12	9590-811-1030	5.80 ppb
2019-06-11	9590-800-1100	7.20 ppb
2019-06-11	9590-801-0830	4.30 ppb
2019-06-11	9590-802-1040	2.00 ppb
2019-06-11	9590-803-0850	5.30 ppb
2019-06-11	9590-804-1125	4.30 ppb
2019-06-11	9590-805-1020	4.00 ppb
2019-06-11	9590-806-1145	9.40 ppb
2019-06-11	9590-807-1320	2.50 ppb
2019-06-11	9590-808-0805	4.60 ppb
2019-06-11	9590-809-0915	2.10 ppb
2019-06-11	9590-810-0945	2.20 ppb
2019-06-11	9590-811-1215	2.10 ppb
2019-09-10	9590-800-1010	2.70 ppb
2019-09-10	9590-801-1205	6.20 ppb
2019-09-10	9590-802-1035	4.20 ppb
2019-09-10	9590-803-1235	2.00 ppb
2019-09-10	9590-804-0950	2.20 ppb
2019-09-10	9590-805-1100	7.70 ppb
2019-09-10	9590-806-0925	4.60 ppb
2019-09-10	9590-807-1435	1.50 ppb
2019-09-10	9590-808-1135	1.90 ppb
2019-09-10	9590-809-1335	1.90 ppb
2019-09-10	9590-810-1345	1.80 ppb
2019-09-10	9590-811-1410	1.80 ppb
2019-12-10	9590-800-1220	3.80 ppb
2019-12-10	9590-801-0945	3.60 ppb
2019-12-10	9590-802-1145	4.30 ppb
2019-12-10	9590-803-1005	2.50 ppb
2019-12-10	9590-804-1235	4.10 ppb
2019-12-10	9590-805-1130	4.00 ppb
2019-12-10	9590-806-1250	4.00 ppb
2019-12-10	9590-807-1325	3.90 ppb
2019-12-10	9590-808-0925	3.90 ppb
2019-12-10	9590-809-1050	2.60 ppb
2019-12-10	9590-810-1110	4.10 ppb
2019-12-10	9590-811-1305	4.30 ppb