Bromoform

Fredonia, City of

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	0.548 ppb	4	2	ND - 1.40 ppb
2015	0.800 ppb	4	2	ND - 2.00 ppb
2016	0.495 ppb	4	3	ND - 0.790 ppb
2017	1.02 ppb	4	3	ND - 2.50 ppb
2018	1.33 ppb	3	2	ND - 2.30 ppb
2019	0.183 ppb	4	1	ND - 0.730 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
2014-01-06	31344	ND
2014-04-21	100429	0.790 ppb
2014-07-21	155894	ND
2014-10-06	210055	1.40 ppb
2015-01-12	263724	ND
2015-04-13	312661	1.20 ppb
2015-07-07	363332	ND
2015-09-28	414150	2.00 ppb
2016-02-09	491609	0.560 ppb
2016-04-05	521040	0.630 ppb
2016-07-05	577859	0.790 ppb
2016-10-03	635256	ND
2017-01-30	679106	0.590 ppb
2017-04-03	733743	ND
2017-07-10	795115	1.000 ppb
2017-10-09	859303	2.50 ppb
2018-03-26	907012	1.70 ppb
2018-07-16	1007318	2.30 ppb
2018-10-15	1061996	ND
2019-03-25	1138062	ND
2019-06-24	1138064	ND
2019-07-21	1207779	ND
2019-10-28	1265512	0.730 ppb