Bromodichloromethane

City of Chino

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

187

Samples

Samples exceeding legal limit (MCL)

171

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	6.61 ppb	33	32	ND - 9.80 ppb
2015	4.63 ppb	38	29	ND - 12.0 ppb
2016	7.97 ppb	24	24	2.00 ppb - 14.0 ppb
2017	6.94 ppb	32	30	ND - 12.0 ppb
2018	12.7 ppb	28	24	ND - 18.0 ppb
2019	15.4 ppb	32	32	8.50 ppb - 21.0 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
2014-01-16	9590-601-0844	7.90 ppb
2014-01-16	9590-602-0819	8.10 ppb
2014-01-16	9590-603-0855	7.80 ppb
2014-01-16	9590-604-0836	7.80 ppb
2014-01-16	9590-605-0807	7.80 ppb
2014-01-16	9590-606-0756	7.50 ppb
2014-01-16	9590-607-0827	7.80 ppb
2014-01-16	9590-608-0748	7.80 ppb
2014-03-25	9590-019-0830	ND
2014-04-22	9590-601-0843	7.20 ppb
2014-04-22	9590-602-0825	5.80 ppb
2014-04-22	9590-603-0917	7.70 ppb
2014-04-22	9590-604-0838	7.50 ppb
2014-04-22	9590-605-0807	5.10 ppb
2014-04-22	9590-606-0855	1.80 ppb
2014-04-22	9590-607-0833	7.30 ppb
2014-04-22	9590-608-1103	7.10 ppb
2014-07-17	9590-601-0814	6.10 ppb
2014-07-17	9590-602-0753	4.60 ppb
2014-07-17	9590-603-0824	7.20 ppb
2014-07-17	9590-604-0808	6.00 ppb
2014-07-17	9590-605-0744	4.60 ppb
2014-07-17	9590-606-0732	1.50 ppb
2014-07-17	9590-607-0800	5.90 ppb
2014-07-17	9590-608-0723	5.90 ppb
2014-10-16	9590-601-0942	9.00 ppb
2014-10-16	9590-602-0854	8.60 ppb
2014-10-16	9590-603-0959	9.80 ppb
2014-10-16	9590-604-0920	9.10 ppb
2014-10-16	9590-605-0841	7.50 ppb
2014-10-16	9590-606-0828	2.20 ppb
2014-10-16	9590-607-0906	9.20 ppb
2014-10-16	9590-608-0815	9.00 ppb
2015-01-14	9590-601-0800	4.30 ppb
2015-01-14	9590-602-0840	1.30 ppb
2015-01-14	9590-603-0735	6.70 ppb
2015-01-14	9590-604-0830	3.30 ppb
2015-01-14	9590-605-0900	2.30 ppb
2015-01-14	9590-606-0850	1.80 ppb
2015-01-14	9590-607-0815	4.10 ppb
2015-01-14	9590-608-0910	5.60 ppb
2015-04-09	9590-601-0912	2.40 ppb
2015-04-09	9590-602-0842	2.00 ppb
2015-04-09	9590-603-0926	5.80 ppb
2015-04-09	9590-604-0902	3.60 ppb
2015-04-09	9590-605-0830	2.20 ppb
2015-04-09	9590-606-0815	ND
2015-04-09	9590-607-0852	3.90 ppb
2015-04-09	9590-608-0806	5.10 ppb
2015-07-16	9590-601-0850	11.0 ppb
2015-07-16	9590-602-0817	11.0 ppb
2015-07-16	9590-603-0904	12.0 ppb
2015-07-16	9590-604-0837	11.0 ppb
2015-07-16	9590-605-0805	11.0 ppb
2015-07-16	9590-606-0752	5.10 ppb
2015-07-16	9590-607-0830	12.0 ppb
2015-07-16	9590-608-0741	12.0 ppb
2015-08-25	9590-004-0720	ND
2015-08-25	9590-009-0900	ND
2015-08-25	9590-010-0740	ND
2015-08-25	9590-011-0930	ND
2015-08-25	9590-012-0900	ND
2015-08-25	9590-019-1100	ND
2015-10-15	9590-601-0902	5.10 ppb
2015-10-15	9590-602-0824	4.80 ppb
2015-10-15	9590-603-0914	9.90 ppb
2015-10-15	9590-604-0841	ND
2015-10-15	9590-605-0811	3.40 ppb
2015-10-15	9590-606-0801	ND
2015-10-15	9590-607-0832	5.70 ppb
2015-10-15	9590-608-0752	7.50 ppb
2016-01-27	9590-601-0845	5.50 ppb
2016-01-27	9590-602-0821	4.90 ppb
2016-01-27	9590-603-0904	7.20 ppb
2016-01-27	9590-604-0837	5.50 ppb
2016-01-27	9590-605-0809	4.50 ppb
2016-01-27	9590-606-0800	2.00 ppb
2016-01-27	9590-607-0830	5.50 ppb
2016-01-27	9590-608-0743	5.20 ppb
2016-04-21	9590-601-0920	11.0 ppb
2016-04-21	9590-602-0839	11.0 ppb
2016-04-21	9590-603-0932	14.0 ppb
2016-04-21	9590-604-0858	11.0 ppb
2016-04-21	9590-605-0821	11.0 ppb
2016-04-21	9590-606-0817	8.20 ppb
2016-04-21	9590-607-0847	11.0 ppb
2016-04-21	9590-608-0809	11.0 ppb
2016-10-20	9590-601-0823	7.70 ppb
2016-10-20	9590-602-0754	7.60 ppb
2016-10-20	9590-603-0836	9.90 ppb
2016-10-20	9590-604-0812	8.00 ppb
2016-10-20	9590-605-0743	7.50 ppb
2016-10-20	9590-606-0728	6.40 ppb
2016-10-20	9590-607-0803	7.80 ppb
2016-10-20	9590-608-0721	7.80 ppb
2017-01-19	9590-601-0851	2.20 ppb
2017-01-19	9590-602-0814	1.60 ppb
2017-01-19	9590-603-0903	1.50 ppb
2017-01-19	9590-604-0828	2.20 ppb
2017-01-19	9590-605-0802	ND
2017-01-19	9590-606-0747	ND
2017-01-19	9590-607-0821	3.10 ppb
2017-01-19	9590-608-0738	1.40 ppb
2017-04-20	9590-601-0855	8.50 ppb
2017-04-20	9590-602-0826	6.60 ppb
2017-04-20	9590-603-0907	10.00 ppb
2017-04-20	9590-604-0846	8.50 ppb
2017-04-20	9590-605-0815	8.10 ppb
2017-04-20	9590-606-0800	3.50 ppb
2017-04-20	9590-607-0836	8.30 ppb
2017-04-20	9590-608-0752	8.30 ppb
2017-07-20	9590-601-0947	8.50 ppb
2017-07-20	9590-602-0848	8.60 ppb
2017-07-20	9590-603-1008	9.80 ppb
2017-07-20	9590-604-0937	8.60 ppb
2017-07-20	9590-605-0829	7.20 ppb
2017-07-20	9590-606-0817	9.40 ppb
2017-07-20	9590-607-0927	8.60 ppb
2017-07-20	9590-608-0807	8.70 ppb
2017-10-26	9590-601-0850	10.00 ppb
2017-10-26	9590-602-0802	10.00 ppb
2017-10-26	9590-603-0908	12.0 ppb
2017-10-26	9590-604-0830	11.0 ppb
2017-10-26	9590-605-0746	8.20 ppb
2017-10-26	9590-606-0732	7.60 ppb
2017-10-26	9590-607-0819	10.00 ppb
2017-10-26	9590-608-0722	10.00 ppb
2018-02-08	9590-605-0858	9.40 ppb
2018-02-08	9590-606-0842	14.0 ppb
2018-02-08	9590-608-0830	14.0 ppb
2018-03-07	9590-601-0834	17.0 ppb
2018-03-07	9590-602-0726	17.0 ppb
2018-03-07	9590-603-0820	14.0 ppb
2018-03-07	9590-604-0800	17.0 ppb
2018-03-07	9590-607-0740	17.0 ppb
2018-05-16	9590-601-0805	17.0 ppb
2018-05-16	9590-602-0739	18.0 ppb
2018-05-16	9590-603-0821	16.0 ppb
2018-05-16	9590-604-0756	18.0 ppb
2018-05-16	9590-605-0726	13.0 ppb
2018-05-16	9590-606-0711	16.0 ppb
2018-05-16	9590-607-0748	18.0 ppb
2018-05-16	9590-608-0701	18.0 ppb
2018-07-17	9588-008-0920	ND
2018-07-17	9588-012-0815	ND
2018-07-31	9588-019-0705	ND
2018-10-18	9588-601-0835	14.0 ppb
2018-10-18	9588-602-0925	14.0 ppb
2018-10-18	9588-603-1000	10.00 ppb
2018-10-18	9588-605-1035	10.00 ppb
2018-10-18	9588-606-1050	15.0 ppb
2018-10-18	9588-607-0910	14.0 ppb
2018-10-18	9588-608-1100	12.0 ppb
2018-10-23	9588-604-0730	13.0 ppb
2018-11-27	9588-004-0840	ND
2019-01-22	9588-601-0800	17.0 ppb
2019-01-22	9588-602-0950	17.0 ppb
2019-01-22	9588-603-0820	21.0 ppb
2019-01-22	9588-604-0745	17.0 ppb
2019-01-22	9588-605-0935	15.0 ppb
2019-01-22	9588-606-0920	17.0 ppb
2019-01-22	9588-607-0835	17.0 ppb
2019-01-22	9588-608-0900	9.40 ppb
2019-04-30	9588-601-0750	21.0 ppb
2019-04-30	9588-602-1035	19.0 ppb
2019-04-30	9588-603-0850	19.0 ppb
2019-04-30	9588-604-0735	20.0 ppb
2019-04-30	9588-605-1025	14.0 ppb
2019-04-30	9588-606-1015	12.0 ppb
2019-04-30	9588-607-1000	20.0 ppb
2019-04-30	9588-608-1055	19.0 ppb
2019-07-02	9588-601-0817	16.0 ppb
2019-07-02	9588-602-0738	16.0 ppb
2019-07-02	9588-603-0835	15.0 ppb
2019-07-02	9588-604-0802	16.0 ppb
2019-07-02	9588-605-0723	12.0 ppb
2019-07-02	9588-606-0707	15.0 ppb
2019-07-02	9588-607-0749	16.0 ppb
2019-07-02	9588-608-0655	17.0 ppb
2019-10-15	9588-601-1015	12.0 ppb
2019-10-15	9588-602-0949	12.0 ppb
2019-10-15	9588-603-1040	12.0 ppb
2019-10-15	9588-604-1007	13.0 ppb
2019-10-15	9588-605-0937	8.50 ppb
2019-10-15	9588-606-0926	12.0 ppb
2019-10-15	9588-607-0937	13.0 ppb
2019-10-15	9588-608-0917	12.0 ppb