Bromoform

City of Scottsville

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	2.18 ppb	4	4	1.60 ppb - 2.70 ppb
2015	0.682 ppb	5	2	ND - 1.81 ppb
2016	0.716 ppb	5	2	ND - 1.85 ppb
2017	0.434 ppb	5	2	ND - 1.09 ppb
2018	0.570 ppb	5	2	ND - 1.73 ppb
2019	ND	4	0	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
2014-03-25	Q1409723001	2.60 ppb
2014-06-16	Q1421399002	1.80 ppb
2014-09-16	Q1444649001	1.60 ppb
2014-12-12	Q1459890001	2.70 ppb
2015-03-09	Q1508446001	1.60 ppb
2015-05-12	Q1517313001	1.81 ppb
2015-08-03	Q1529849009	ND
2015-08-03	Q1529849004	ND
2015-10-15	Q1540666001	ND
2016-02-09	Q1605515004	1.73 ppb
2016-02-09	Q1605515002	ND
2016-04-25	Q1616018001	1.85 ppb
2016-07-28	Q1631044001	ND
2016-10-12	Q1643523001	ND
2017-01-17	Q1702096001	1.09 ppb
2017-04-25	Q1716810001	1.08 ppb
2017-07-24	Q1730468001	ND
2017-10-23	Q1754137003	ND
2017-10-23	Q1754137004	ND
2018-02-01	Q1804022001	ND
2018-04-24	Q1816639005	1.12 ppb
2018-04-24	Q1816639001	ND
2018-08-02	Q1830801001	ND
2018-10-17	Q1841361001	1.73 ppb
2019-03-13	Q1910588001	ND
2019-03-13	Q1910588002	ND
2019-05-29	Q1929344001	ND
2019-09-09	Q1962880001	ND