Bromoform

City of Chino

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

159

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	17.8 ppb	33	32	ND - 24.0 ppb
2015	10.8 ppb	38	31	ND - 26.0 ppb
2016	16.7 ppb	24	24	7.60 ppb - 26.0 ppb
2017	1.57 ppb	32	16	ND - 5.90 ppb
2018	9.64 ppb	28	24	ND - 18.0 ppb
2019	7.36 ppb	32	32	1.000 ppb - 31.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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	21.0 ppb
2014-01-16	9590-602-0819	21.0 ppb
2014-01-16	9590-603-0855	20.0 ppb
2014-01-16	9590-604-0836	20.0 ppb
2014-01-16	9590-605-0807	20.0 ppb
2014-01-16	9590-606-0756	19.0 ppb
2014-01-16	9590-607-0827	20.0 ppb
2014-01-16	9590-608-0748	20.0 ppb
2014-03-25	9590-019-0830	ND
2014-04-22	9590-601-0843	23.0 ppb
2014-04-22	9590-602-0825	18.0 ppb
2014-04-22	9590-603-0917	24.0 ppb
2014-04-22	9590-604-0838	23.0 ppb
2014-04-22	9590-605-0807	16.0 ppb
2014-04-22	9590-606-0855	6.00 ppb
2014-04-22	9590-607-0833	23.0 ppb
2014-04-22	9590-608-1103	22.0 ppb
2014-07-17	9590-601-0814	20.0 ppb
2014-07-17	9590-602-0753	15.0 ppb
2014-07-17	9590-603-0824	21.0 ppb
2014-07-17	9590-604-0808	19.0 ppb
2014-07-17	9590-605-0744	15.0 ppb
2014-07-17	9590-606-0732	5.20 ppb
2014-07-17	9590-607-0800	19.0 ppb
2014-07-17	9590-608-0723	19.0 ppb
2014-10-16	9590-601-0942	20.0 ppb
2014-10-16	9590-602-0854	18.0 ppb
2014-10-16	9590-603-0959	22.0 ppb
2014-10-16	9590-604-0920	19.0 ppb
2014-10-16	9590-605-0841	16.0 ppb
2014-10-16	9590-606-0828	4.80 ppb
2014-10-16	9590-607-0906	20.0 ppb
2014-10-16	9590-608-0815	19.0 ppb
2015-01-14	9590-601-0800	11.0 ppb
2015-01-14	9590-602-0840	4.40 ppb
2015-01-14	9590-603-0735	17.0 ppb
2015-01-14	9590-604-0830	8.80 ppb
2015-01-14	9590-605-0900	7.30 ppb
2015-01-14	9590-606-0850	6.20 ppb
2015-01-14	9590-607-0815	10.00 ppb
2015-01-14	9590-608-0910	15.0 ppb
2015-04-09	9590-601-0912	8.10 ppb
2015-04-09	9590-602-0842	6.50 ppb
2015-04-09	9590-603-0926	17.0 ppb
2015-04-09	9590-604-0902	12.0 ppb
2015-04-09	9590-605-0830	6.90 ppb
2015-04-09	9590-606-0815	1.20 ppb
2015-04-09	9590-607-0852	13.0 ppb
2015-04-09	9590-608-0806	17.0 ppb
2015-07-16	9590-601-0850	18.0 ppb
2015-07-16	9590-602-0817	17.0 ppb
2015-07-16	9590-603-0904	21.0 ppb
2015-07-16	9590-604-0837	18.0 ppb
2015-07-16	9590-605-0805	15.0 ppb
2015-07-16	9590-606-0752	7.80 ppb
2015-07-16	9590-607-0830	17.0 ppb
2015-07-16	9590-608-0741	17.0 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	17.0 ppb
2015-10-15	9590-602-0824	16.0 ppb
2015-10-15	9590-603-0914	26.0 ppb
2015-10-15	9590-604-0841	ND
2015-10-15	9590-605-0811	11.0 ppb
2015-10-15	9590-606-0801	2.10 ppb
2015-10-15	9590-607-0832	20.0 ppb
2015-10-15	9590-608-0752	25.0 ppb
2016-01-27	9590-601-0845	24.0 ppb
2016-01-27	9590-602-0821	22.0 ppb
2016-01-27	9590-603-0904	26.0 ppb
2016-01-27	9590-604-0837	24.0 ppb
2016-01-27	9590-605-0809	20.0 ppb
2016-01-27	9590-606-0800	8.50 ppb
2016-01-27	9590-607-0830	24.0 ppb
2016-01-27	9590-608-0743	23.0 ppb
2016-04-21	9590-601-0920	9.60 ppb
2016-04-21	9590-602-0839	9.80 ppb
2016-04-21	9590-603-0932	9.20 ppb
2016-04-21	9590-604-0858	9.70 ppb
2016-04-21	9590-605-0821	9.80 ppb
2016-04-21	9590-606-0817	7.60 ppb
2016-04-21	9590-607-0847	9.80 ppb
2016-04-21	9590-608-0809	9.60 ppb
2016-10-20	9590-601-0823	20.0 ppb
2016-10-20	9590-602-0754	18.0 ppb
2016-10-20	9590-603-0836	25.0 ppb
2016-10-20	9590-604-0812	20.0 ppb
2016-10-20	9590-605-0743	18.0 ppb
2016-10-20	9590-606-0728	16.0 ppb
2016-10-20	9590-607-0803	19.0 ppb
2016-10-20	9590-608-0721	19.0 ppb
2017-01-19	9590-601-0851	2.90 ppb
2017-01-19	9590-602-0814	2.10 ppb
2017-01-19	9590-603-0903	5.90 ppb
2017-01-19	9590-604-0828	2.90 ppb
2017-01-19	9590-605-0802	1.20 ppb
2017-01-19	9590-606-0747	ND
2017-01-19	9590-607-0821	4.20 ppb
2017-01-19	9590-608-0738	1.60 ppb
2017-04-20	9590-601-0855	ND
2017-04-20	9590-602-0826	ND
2017-04-20	9590-603-0907	ND
2017-04-20	9590-604-0846	ND
2017-04-20	9590-605-0815	ND
2017-04-20	9590-606-0800	ND
2017-04-20	9590-607-0836	ND
2017-04-20	9590-608-0752	ND
2017-07-20	9590-601-0947	ND
2017-07-20	9590-602-0848	ND
2017-07-20	9590-603-1008	ND
2017-07-20	9590-604-0937	ND
2017-07-20	9590-605-0829	1.40 ppb
2017-07-20	9590-606-0817	ND
2017-07-20	9590-607-0927	ND
2017-07-20	9590-608-0807	ND
2017-10-26	9590-601-0850	3.50 ppb
2017-10-26	9590-602-0802	3.40 ppb
2017-10-26	9590-603-0908	4.20 ppb
2017-10-26	9590-604-0830	3.50 ppb
2017-10-26	9590-605-0746	3.60 ppb
2017-10-26	9590-606-0732	2.70 ppb
2017-10-26	9590-607-0819	3.50 ppb
2017-10-26	9590-608-0722	3.50 ppb
2018-02-08	9590-605-0858	7.30 ppb
2018-02-08	9590-606-0842	10.00 ppb
2018-02-08	9590-608-0830	10.00 ppb
2018-03-07	9590-601-0834	12.0 ppb
2018-03-07	9590-602-0726	12.0 ppb
2018-03-07	9590-603-0820	11.0 ppb
2018-03-07	9590-604-0800	12.0 ppb
2018-03-07	9590-607-0740	12.0 ppb
2018-05-16	9590-601-0805	8.10 ppb
2018-05-16	9590-602-0739	8.30 ppb
2018-05-16	9590-603-0821	7.20 ppb
2018-05-16	9590-604-0756	8.10 ppb
2018-05-16	9590-605-0726	6.80 ppb
2018-05-16	9590-606-0711	7.30 ppb
2018-05-16	9590-607-0748	8.30 ppb
2018-05-16	9590-608-0701	8.50 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	16.0 ppb
2018-10-18	9588-602-0925	17.0 ppb
2018-10-18	9588-603-1000	12.0 ppb
2018-10-18	9588-605-1035	11.0 ppb
2018-10-18	9588-606-1050	17.0 ppb
2018-10-18	9588-607-0910	16.0 ppb
2018-10-18	9588-608-1100	14.0 ppb
2018-10-23	9588-604-0730	18.0 ppb
2018-11-27	9588-004-0840	ND
2019-01-22	9588-601-0800	23.0 ppb
2019-01-22	9588-602-0950	22.0 ppb
2019-01-22	9588-603-0820	31.0 ppb
2019-01-22	9588-604-0745	23.0 ppb
2019-01-22	9588-605-0935	19.0 ppb
2019-01-22	9588-606-0920	21.0 ppb
2019-01-22	9588-607-0835	23.0 ppb
2019-01-22	9588-608-0900	12.0 ppb
2019-04-30	9588-601-0750	2.90 ppb
2019-04-30	9588-602-1035	2.40 ppb
2019-04-30	9588-603-0850	3.60 ppb
2019-04-30	9588-604-0735	2.70 ppb
2019-04-30	9588-605-1025	3.00 ppb
2019-04-30	9588-606-1015	1.90 ppb
2019-04-30	9588-607-1000	2.60 ppb
2019-04-30	9588-608-1055	2.80 ppb
2019-07-02	9588-601-0817	3.40 ppb
2019-07-02	9588-602-0738	3.40 ppb
2019-07-02	9588-603-0835	3.30 ppb
2019-07-02	9588-604-0802	3.40 ppb
2019-07-02	9588-605-0723	3.50 ppb
2019-07-02	9588-606-0707	4.00 ppb
2019-07-02	9588-607-0749	3.40 ppb
2019-07-02	9588-608-0655	4.30 ppb
2019-10-15	9588-601-1015	1.40 ppb
2019-10-15	9588-602-0949	1.30 ppb
2019-10-15	9588-603-1040	1.000 ppb
2019-10-15	9588-604-1007	1.50 ppb
2019-10-15	9588-605-0937	1.70 ppb
2019-10-15	9588-606-0926	1.20 ppb
2019-10-15	9588-607-0937	1.50 ppb
2019-10-15	9588-608-0917	1.30 ppb