Bromoform

The Reserve

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	5	ND
2015	ND	5	ND
2016	ND	6	ND
2017	ND	5	ND
2018	ND	5	ND
2019	ND	5	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
2014-03-21	Q1409167001	ND
2014-06-19	Q1422502001	ND
2014-09-02	Q1440632001	ND
2014-12-19	Q1460751006	ND
2014-12-19	Q1460751004	ND
2015-03-19	Q1510478001	ND
2015-06-11	Q1521799003	ND
2015-06-11	Q1521799002	ND
2015-09-25	Q1538061001	ND
2015-12-10	Q1549457001	ND
2016-03-15	Q1610722001	ND
2016-06-22	Q1625372007	ND
2016-06-22	Q1625372006	ND
2016-09-16	Q1638418003	ND
2016-09-16	Q1638418001	ND
2016-12-01	Q1652396001	ND
2017-03-21	Q1711906007	ND
2017-03-21	Q1711906001	ND
2017-05-25	Q1722185001	ND
2017-09-13	Q1743581001	ND
2017-11-17	Q1759494001	ND
2018-03-20	Q1811041001	ND
2018-03-20	Q1811041002	ND
2018-05-25	Q1821197001	ND
2018-08-29	Q1834583001	ND
2018-11-20	Q1847534001	ND
2019-03-26	Q1912177008	ND
2019-03-26	Q1912177001	ND
2019-06-04	Q1931264001	ND
2019-09-09	Q1962808001	ND
2019-12-04	Q1979202001	ND