Dibromochloromethane

Othello Water Department

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane 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	0.471 ppb	7	4	ND - 1.000 ppb
2015	0.933 ppb	6	6	0.500 ppb - 1.70 ppb
2016	0.250 ppb	8	3	ND - 0.700 ppb
2017	0.1000 ppb	6	1	ND - 0.600 ppb
2018	0.450 ppb	4	3	ND - 0.600 ppb
2019	0.175 ppb	4	1	ND - 0.700 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2014-08-04	33777	ND
2014-08-04	33776	ND
2014-08-04	33774	0.600 ppb
2014-08-04	33778	0.800 ppb
2014-08-04	33773	0.900 ppb
2014-08-04	33775	1.000 ppb
2014-09-11	41238	ND
2015-08-19	39350	0.500 ppb
2015-08-19	39344	1.60 ppb
2015-08-19	39354	0.600 ppb
2015-08-19	39348	1.70 ppb
2015-08-19	39346	0.600 ppb
2015-08-19	39352	0.600 ppb
2016-05-11		ND
2016-06-21		ND
2016-08-03		ND
2016-08-17		ND
2016-08-17		0.600 ppb
2016-08-17		ND
2016-08-17		0.700 ppb
2016-08-17		0.700 ppb
2017-04-10		ND
2017-04-10		ND
2017-06-12		ND
2017-06-12		ND
2017-08-09		ND
2017-08-09		0.600 ppb
2018-08-08		0.600 ppb
2018-08-08		0.600 ppb
2018-08-08		0.600 ppb
2018-12-13		ND
2019-06-18		ND
2019-07-08		ND
2019-08-15		ND
2019-08-15		0.700 ppb