Bromoform

City of Corcoran

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.290 ppb	20	5	ND - 1.20 ppb
2015	0.319 ppb	16	4	ND - 1.30 ppb
2016	0.779 ppb	14	7	ND - 2.20 ppb
2017	0.625 ppb	12	6	ND - 1.50 ppb
2018	1.26 ppb	9	8	ND - 1.90 ppb
2019	1.52 ppb	10	8	ND - 2.70 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
2014-01-29	5810-902-0847	1.10 ppb
2014-01-29	5810-901-0942	1.20 ppb
2014-01-29	5810-900-0924	1.20 ppb
2014-01-29	5810-903-0908	1.20 ppb
2014-03-25	5810-018-1106	ND
2014-03-25	5810-026-1045	ND
2014-04-21	5810-903-0928	ND
2014-04-21	5810-902-0908	ND
2014-04-21	5810-900-0943	1.10 ppb
2014-04-21	5810-901-0955	ND
2014-06-16	5810-002-0800	ND
2014-07-21	5810-902-0827	ND
2014-07-21	5810-901-0928	ND
2014-07-21	5810-903-0854	ND
2014-07-21	5810-900-0917	ND
2014-10-13	5810-903-0922	ND
2014-10-13	5810-900-1025	ND
2014-10-13	5810-901-1038	ND
2014-10-13	5810-902-0849	ND
2014-12-22	5810-019-0840	ND
2015-03-09	5810-900-1001	1.30 ppb
2015-03-09	5810-902-0930	1.30 ppb
2015-03-09	5810-903-0949	1.20 ppb
2015-03-09	5810-901-1013	1.30 ppb
2015-04-27	5810-902-0838	ND
2015-04-27	5810-900-0914	ND
2015-04-27	5810-901-0924	ND
2015-04-27	5810-903-0902	ND
2015-07-27	5810-903-0855	ND
2015-07-27	5810-902-0833	ND
2015-07-27	5810-901-0930	ND
2015-07-27	5810-900-0914	ND
2015-10-26	5810-900-0922	ND
2015-10-26	5810-903-0904	ND
2015-10-26	5810-901-0936	ND
2015-10-26	5810-902-0843	ND
2016-04-25	5810-903-0938	1.40 ppb
2016-04-25	5810-902-0914	1.40 ppb
2016-04-25	5810-901-1004	1.40 ppb
2016-04-25	5810-900-0950	1.50 ppb
2016-07-25	5810-903-0908	ND
2016-07-25	5810-900-0923	ND
2016-07-25	5810-901-0939	1.20 ppb
2016-07-25	5810-902-0842	ND
2016-11-10	5810-001-0915	ND
2016-11-14	5810-902-0847	2.20 ppb
2016-11-14	5810-900-0948	1.80 ppb
2016-12-14	5810-003-0740	ND
2016-12-14	5810-019-0830	ND
2016-12-28	5810-016-0750	ND
2017-02-13	5810-026-0850	ND
2017-03-01	5810-902-0835	1.10 ppb
2017-03-01	5810-900-0921	1.30 ppb
2017-04-10	5810-902-0930	1.10 ppb
2017-04-10	5810-900-1002	1.30 ppb
2017-04-19	5810-018-0900	ND
2017-04-19	5810-002-0950	ND
2017-09-06	5810-015-0855	ND
2017-09-11	5810-902-0900	ND
2017-09-11	5810-900-1005	ND
2017-11-20	5810-902-0920	1.20 ppb
2017-11-20	5810-900-1020	1.50 ppb
2018-01-29	5810-900-1000	1.30 ppb
2018-01-29	5810-902-0855	1.20 ppb
2018-04-04	5810-900-0940	1.80 ppb
2018-04-04	5810-902-0852	1.20 ppb
2018-05-18	5810-019-1400	ND
2018-10-03	5810-900-0830	1.60 ppb
2018-10-03	5810-902-0840	1.10 ppb
2018-12-10	5810-900-0910	1.90 ppb
2018-12-10	5810-902-0952	1.20 ppb
2019-01-14	5810-900-0911	1.80 ppb
2019-01-14	5810-902-0951	1.70 ppb
2019-04-10	5810-902-1050	1.70 ppb
2019-04-10	5810-900-0950	1.80 ppb
2019-07-10	5810-902-0912	1.50 ppb
2019-07-10	5810-900-0825	2.60 ppb
2019-10-09	5810-003-0900	ND
2019-10-14	5810-016-0900	ND
2019-11-13	5810-902-0702	1.40 ppb
2019-11-13	5810-900-0635	2.70 ppb