Bromoform

Brodnax, Town 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	0.375 ppb	4	2	ND - 0.900 ppb
2015	0.775 ppb	4	4	0.600 ppb - 0.900 ppb
2016	ND	4	0	ND
2017	0.200 ppb	4	1	ND - 0.800 ppb
2018	0.625 ppb	4	3	ND - 1.000 ppb
2019	0.200 ppb	4	1	ND - 0.800 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
2014-02-25	E131203700	ND
2014-05-20	E140306946	0.600 ppb
2014-08-12	E140605007	ND
2014-11-18	E140902236	0.900 ppb
2015-02-10	VA010-DCLS	0.600 ppb
2015-06-08	VA010-DCLS	0.800 ppb
2015-08-04	VA010-DCLS	0.900 ppb
2015-11-17	VA010-DCLS	0.800 ppb
2016-02-09	E151202244	ND
2016-05-17	E160205494	ND
2016-08-16	E160602698	ND
2016-11-01	E160903373	ND
2017-02-07	E161202296	ND
2017-05-16	E170302181	ND
2017-08-23	E170606548	ND
2017-11-07	E170901240	0.800 ppb
2018-02-12	E171202607	1.000 ppb
2018-05-07	E180304730	1.000 ppb
2018-08-06	E180603488	ND
2018-11-13	E180905680	0.500 ppb
2019-02-12	E181200893	ND
2019-05-07	E190304214	ND
2019-08-14	E190605425	ND
2019-11-05	E191000580	0.800 ppb