Bromoform

Valdese

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	ND	16	ND
2015	ND	16	ND
2016	ND	16	ND
2017	ND	16	ND
2018	ND	16	ND
2019	ND	16	ND

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
2014-02-05	T-1402-041	ND
2014-02-05	T-1402-040	ND
2014-02-05	T-1402-039	ND
2014-02-05	T-1402-042	ND
2014-05-07	T-1405-036	ND
2014-05-07	T-1405-035	ND
2014-05-07	T-1405-034	ND
2014-05-07	T-1405-033	ND
2014-08-07	T-1408-060	ND
2014-08-07	T-1408-059	ND
2014-08-07	T-1408-058	ND
2014-08-07	T-1408-057	ND
2014-11-04	T-1411-017	ND
2014-11-04	T-1411-016	ND
2014-11-04	T-1411-018	ND
2014-11-04	T-1411-019	ND
2015-02-04		ND
2015-02-04		ND
2015-02-04		ND
2015-02-04		ND
2015-05-06		ND
2015-05-06		ND
2015-05-06		ND
2015-05-06		ND
2015-08-05		ND
2015-08-05		ND
2015-08-05		ND
2015-08-05		ND
2015-11-04		ND
2015-11-04		ND
2015-11-04		ND
2015-11-04		ND
2016-02-09	T-1602-054	ND
2016-02-09	T-1602-051	ND
2016-02-09	T-1602-052	ND
2016-02-09	T-1602-053	ND
2016-05-09	T-1605-045	ND
2016-05-09	T-1605-046	ND
2016-05-09	T-1605-047	ND
2016-05-09	T-1605-048	ND
2016-08-02	T-1608-012	ND
2016-08-02	T-1608-013	ND
2016-08-02	T-1608-014	ND
2016-08-02	T-1608-015	ND
2016-11-03	T-1611-011	ND
2016-11-03	T-1611-010	ND
2016-11-03	T-1611-012	ND
2016-11-03	T-1611-013	ND
2017-02-08	T-1702-053	ND
2017-02-08	T-1702-054	ND
2017-02-08	T-1702-055	ND
2017-02-08	T-1702-056	ND
2017-05-04	T-1705-044	ND
2017-05-04	T-1705-043	ND
2017-05-04	T-1705-042	ND
2017-05-04	T-1705-041	ND
2017-08-02	38218-04	ND
2017-08-02	38218-01	ND
2017-08-02	38218-03	ND
2017-08-02	38218-02	ND
2017-11-01	42359-02	ND
2017-11-01	42359-01	ND
2017-11-01	42359-04	ND
2017-11-01	42359-03	ND
2018-02-06	46386-04	ND
2018-02-06	46386-03	ND
2018-02-06	46386-02	ND
2018-02-06	46386-01	ND
2018-05-01	50148-04	ND
2018-05-01	50148-01	ND
2018-05-01	50148-02	ND
2018-05-01	50148-03	ND
2018-08-01	54220-04	ND
2018-08-01	54220-03	ND
2018-08-01	54220-02	ND
2018-08-01	54220-01	ND
2018-11-13	59281-01	ND
2018-11-13	59281-02	ND
2018-11-13	59281-03	ND
2018-11-13	59281-04	ND
2019-02-05	62791-01	ND
2019-02-05	62791-02	ND
2019-02-05	62791-03	ND
2019-02-05	62791-04	ND
2019-05-07	66532-01	ND
2019-05-07	66532-04	ND
2019-05-07	66532-03	ND
2019-05-07	66532-02	ND
2019-08-06	70506-01	ND
2019-08-06	70506-03	ND
2019-08-06	70506-02	ND
2019-08-07	70506-04	ND
2019-11-05	74636-04	ND
2019-11-05	74636-03	ND
2019-11-05	74636-02	ND
2019-11-05	74636-01	ND