Bromodichloromethane

Troy Utilities

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.

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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	ND	4	0	ND
2015	ND	6	0	ND
2016	ND	7	0	ND
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	0.457 ppb	7	2	ND - 1.60 ppb

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
2014-03-04	112403042014-1	ND
2014-06-03	112406032014-2	ND
2014-08-18	112408182014-1	ND
2014-10-14	112410142014-1V	ND
2015-03-18	1124-031815-VOC-	ND
2015-03-18	112403182015-2	ND
2015-05-19	1124-051915-VOC-	ND
2015-05-19	112405192015-1	ND
2015-09-02	112409022015-1	ND
2015-10-20	112410202015-1V	ND
2016-03-18	112403182015-1V	ND
2016-04-06	1124-040616-VOC-	ND
2016-11-02	112411022016-2	ND
2016-11-02	112411022016-1	ND
2016-11-02	112411022016-3	ND
2016-11-02	112411022016-5	ND
2016-11-02	112411022016-4	ND
2019-05-20	19050623-003	1.60 ppb
2019-05-20	19050623-003AA	1.60 ppb
2019-05-20	19050623-006A	ND
2019-05-20	19050623-001A	ND
2019-05-20	19050623-005A	ND
2019-05-20	19050623-002A	ND
2019-05-20	19050623-003A	ND