Bromoform

Deanville Water Supply Corporation

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	0.667 ppb	3	1	ND - 2.00 ppb
2015	0.360 ppb	5	1	ND - 1.80 ppb
2016	1.54 ppb	5	2	ND - 6.50 ppb
2017	4.50 ppb	5	2	ND - 21.0 ppb
2018	5.30 ppb	5	2	ND - 25.0 ppb
2019	3.46 ppb	5	2	ND - 16.0 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
2014-01-30	AC40727	ND
2014-01-30	AC40725	2.00 ppb
2014-08-05	AC62112	ND
2015-09-10	AD06531	ND
2015-09-10	AD06550	1.80 ppb
2015-09-10	AD06548	ND
2015-09-10	AD06544	ND
2015-09-10	AD06556	ND
2016-09-08	AD48437	ND
2016-10-27	AD55175	1.20 ppb
2016-10-27	AD55173	6.50 ppb
2016-10-27	AD55145	ND
2016-10-27	AD55143	ND
2017-08-30	AD94445	ND
2017-08-30	AD94485	1.50 ppb
2017-08-30	AD94493	ND
2017-08-30	AD94491	ND
2017-12-14	AE07794	21.0 ppb
2018-09-12	AE39801	ND
2018-09-12	AE39820	1.50 ppb
2018-09-12	AE39816	25.0 ppb
2018-09-12	AE39822	ND
2018-09-12	AE39818	ND
2019-08-06	AE77281	ND
2019-08-06	AE77236	ND
2019-08-06	AE77295	16.0 ppb
2019-08-06	AE77297	1.30 ppb
2019-08-06	AE77291	ND