Bromodichloromethane

Mililani

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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
2013	N/A	0	N/A
2014	N/A	0	N/A
2015	ND	7	ND
2016	ND	5	ND
2017	ND	6	ND
2018	ND	4	ND
2019	ND	6	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2015-01-20	201501220075	ND
2015-01-29	201501300118	ND
2015-04-10	201504140151	ND
2015-07-13	201507150474	ND
2015-10-13	201509160125	ND
2015-10-13	201509160126	ND
2015-10-16	201510210706	ND
2016-01-14		ND
2016-01-14		ND
2016-04-11		ND
2016-10-03		ND
2016-10-03		ND
2017-02-01		ND
2017-02-09		ND
2017-10-05		ND
2017-10-05		ND
2017-11-01		ND
2017-11-14		ND
2018-01-11	201712280237	ND
2018-04-10	201804130364	ND
2018-10-01	201810030398	ND
2018-10-15	201810170495	ND
2019-01-29	201901300201	ND
2019-01-29	201901300202	ND
2019-03-12	201903020135	ND
2019-06-27	201906190032	ND
2019-10-02	201910030136	ND
2019-10-02	201910030137	ND