Dibromochloromethane

Carbondale

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	0.0991 ppb	16	3	ND - 0.547 ppb
2015	ND	16	0	ND
2016	0.151 ppb	16	4	ND - 0.619 ppb
2017	0.390 ppb	16	4	ND - 1.60 ppb
2018	ND	16	0	ND
2019	0.159 ppb	16	4	ND - 0.660 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
2014-03-06	4030938-01	ND
2014-03-06	4030938-02	0.534 ppb
2014-03-06	4030938-03	0.547 ppb
2014-03-06	4030938-04	0.505 ppb
2014-06-02	4060835-01	ND
2014-06-02	4060835-02	ND
2014-06-03	4060835-03	ND
2014-06-03	4060835-04	ND
2014-09-04	4090883-01	ND
2014-09-04	4090883-02	ND
2014-09-04	4090883-03	ND
2014-09-04	4090883-04	ND
2014-12-03	4121040-03	ND
2014-12-03	4121040-04	ND
2014-12-03	4121040-02	ND
2014-12-03	4121040-01	ND
2015-03-04	5031206-01	ND
2015-03-04	5031206-02	ND
2015-03-04	5031206-03	ND
2015-03-05	5031206-04	ND
2015-06-03	5061443-01	ND
2015-06-03	5061443-04	ND
2015-06-03	5061443-02	ND
2015-06-04	5061443-03	ND
2015-09-02	5090960-02	ND
2015-09-02	5090960-03	ND
2015-09-02	5090960-01	ND
2015-09-02	5090960-04	ND
2015-12-02	5121158-02	ND
2015-12-02	5121158-01	ND
2015-12-03	5121158-03	ND
2015-12-03	5121158-04	ND
2016-03-02	6030863-04	0.614 ppb
2016-03-02	6030863-03	0.606 ppb
2016-03-02	6030863-02	0.619 ppb
2016-03-02	6030863-01	0.582 ppb
2016-06-01	6061349-02	ND
2016-06-02	6061349-04	ND
2016-06-02	6061349-01	ND
2016-06-02	6061349-03	ND
2016-09-01	6090749-04	ND
2016-09-01	6090749-01	ND
2016-09-01	6090749-02	ND
2016-09-01	6090749-03	ND
2016-12-06	6121146-01	ND
2016-12-06	6121146-04	ND
2016-12-06	6121146-02	ND
2016-12-06	6121146-03	ND
2017-03-06	7031486-01	1.59 ppb
2017-03-06	7031486-04	1.52 ppb
2017-03-06	7031486-03	1.60 ppb
2017-03-06	7031486-02	1.53 ppb
2017-06-05	7061550-03	ND
2017-06-05	7061550-04	ND
2017-06-05	7061550-01	ND
2017-06-05	7061550-02	ND
2017-09-06	7091297-02	ND
2017-09-06	7091297-04	ND
2017-09-06	7091297-01	ND
2017-09-06	7091297-03	ND
2017-12-05	7121595-01	ND
2017-12-05	7121595-03	ND
2017-12-05	7121595-02	ND
2017-12-05	7121595-04	ND
2018-03-06	030618017	ND
2018-03-06	030618016	ND
2018-03-06	030618015	ND
2018-03-06	030618014	ND
2018-06-05	060518015	ND
2018-06-05	060518012	ND
2018-06-05	060518013	ND
2018-06-05	060518014	ND
2018-09-04	090418026	ND
2018-09-04	090418025	ND
2018-09-04	090418024	ND
2018-09-05	090418027	ND
2018-12-03	120418019	ND
2018-12-03	120418020	ND
2018-12-03	120418021	ND
2018-12-04	120418022	ND
2019-03-05	030519022	0.650 ppb
2019-03-05	030519023	0.590 ppb
2019-03-05	030519024	0.650 ppb
2019-03-05	030519025	0.660 ppb
2019-06-03	060319034	ND
2019-06-03	060319037	ND
2019-06-03	060319036	ND
2019-06-03	060319035	ND
2019-09-06	090619002	ND
2019-09-06	090619004	ND
2019-09-06	090619003	ND
2019-09-06	090619001	ND
2019-12-06	120919005	ND
2019-12-06	120919004	ND
2019-12-06	120919003	ND
2019-12-06	120919002	ND