Bromoform

Fcwwd #41/shaver Lake

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	Range of results
2014	N/A	0	N/A
2015	ND	16	ND
2016	ND	13	ND
2017	ND	1	ND
2018	N/A	0	N/A
2019	N/A	0	N/A

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
2015-06-04	5802-004-0900	ND
2015-06-04	5802-005-0930	ND
2015-06-04	5802-001-0800	ND
2015-06-17	5802-062-0930	ND
2015-06-17	5802-034-1030	ND
2015-06-17	5802-033-0850	ND
2015-06-18	5802-009-1030	ND
2015-06-24	5802-011-1000	ND
2015-06-24	5802-012-0930	ND
2015-06-25	5802-015-1030	ND
2015-06-25	5802-014-0945	ND
2015-06-25	5802-008-0400	ND
2015-06-30	5802-035-0930	ND
2015-06-30	5802-006-0830	ND
2015-07-01	5802-036-0830	ND
2015-07-01	5802-042-0930	ND
2016-06-16	5802-058-0930	ND
2016-06-16	5802-057-1030	ND
2016-06-16	5802-056-1130	ND
2016-08-17	5802-065-1015	ND
2016-08-17	5802-059-0930	ND
2016-08-17	5802-066-0845	ND
2016-08-24	5802-044-1030	ND
2016-08-24	5802-046-0930	ND
2016-09-27	5802-041-1115	ND
2016-09-27	5802-038-1015	ND
2016-11-15	5802-043-1000	ND
2016-11-15	5802-040-0930	ND
2016-12-15	5802-037-0830	ND
2017-05-02	5802-002-1100	ND