Bromodichloromethane

Bennington Water Department

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

106

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	0.650 ppb	18	11	ND - 2.20 ppb
2015	0.950 ppb	18	15	ND - 1.70 ppb
2016	0.818 ppb	17	12	ND - 1.70 ppb
2017	0.917 ppb	18	17	ND - 1.50 ppb
2018	0.865 ppb	17	15	ND - 1.90 ppb
2019	0.806 ppb	18	17	ND - 1.40 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
2014-02-10	1402-02505-001	1.40 ppb
2014-02-10	1402-02505-003	ND
2014-02-10	1402-02505-005	ND
2014-02-10	1402-02505-007	0.900 ppb
2014-02-10	1402-02560-001	ND
2014-02-10	1402-02560-002	ND
2014-05-19	1405-09199-001	ND
2014-05-19	1405-09199-003	ND
2014-05-19	1405-09199-005	0.700 ppb
2014-05-19	1405-09199-007	0.900 ppb
2014-08-11	1408-16145-001	ND
2014-08-11	1408-16145-003	0.800 ppb
2014-08-11	1408-16145-005	0.900 ppb
2014-08-11	1408-16145-007	2.20 ppb
2014-11-10	1411-23482-001	0.800 ppb
2014-11-10	1411-23482-002	0.600 ppb
2014-11-10	1411-23482-003	1.000 ppb
2014-11-10	1411-23482-004	1.50 ppb
2015-02-09	1502-02283-001	0.800 ppb
2015-02-09	1502-02283-003	0.500 ppb
2015-02-09	1502-02283-005	0.800 ppb
2015-02-09	1502-02283-007	1.10 ppb
2015-02-17	1502-02721-001	ND
2015-05-04	1505-07997-001	1.60 ppb
2015-05-04	1505-07997-003	ND
2015-05-04	1505-07997-005	ND
2015-05-04	1505-07997-007	1.40 ppb
2015-08-26	1508-18259-001	1.70 ppb
2015-08-26	1508-18259-003	0.900 ppb
2015-08-26	1508-18259-005	1.30 ppb
2015-08-26	1508-18259-007	1.70 ppb
2015-11-09	1511-24278-001	1.30 ppb
2015-11-09	1511-24278-003	0.600 ppb
2015-11-09	1511-24278-005	0.900 ppb
2015-11-09	1511-24278-007	1.50 ppb
2015-11-12	1511-24580-001	1.000 ppb
2016-02-08	1602-02636-001	ND
2016-02-08	1602-02642-001	ND
2016-02-08	1602-02642-003	ND
2016-02-08	1602-02642-005	ND
2016-02-08	1602-02642-007	0.700 ppb
2016-05-09	1605-09283-003	0.800 ppb
2016-05-09	1605-09283-005	1.30 ppb
2016-05-16	1605-09283-007	ND
2016-05-16	1605-09283-009	1.60 ppb
2016-08-08	1608-17423-001	1.40 ppb
2016-08-08	1608-17423-003	1.10 ppb
2016-08-08	1608-17423-005	1.50 ppb
2016-08-08	1608-17423-007	1.70 ppb
2016-11-07	1611-25610-001	0.700 ppb
2016-11-07	1611-25610-003	0.600 ppb
2016-11-07	1611-25610-005	1.000 ppb
2016-11-07	1611-25610-007	1.50 ppb
2017-02-13	1702-03208-001	ND
2017-02-13	1702-03208-003	0.700 ppb
2017-02-13	1702-03182-001	0.900 ppb
2017-02-13	1702-03182-003	0.500 ppb
2017-02-13	1702-03182-005	1.000 ppb
2017-02-13	1702-03182-007	1.000 ppb
2017-05-08	1705-09700-001	1.40 ppb
2017-05-08	1705-09700-003	0.600 ppb
2017-05-08	1705-09700-005	0.900 ppb
2017-05-08	1705-09700-007	0.700 ppb
2017-08-08	1708-18208-001	0.900 ppb
2017-08-08	1708-18208-003	1.000 ppb
2017-08-08	1708-18208-005	1.50 ppb
2017-08-08	1708-18208-007	1.30 ppb
2017-11-06	1711-26724-001	0.800 ppb
2017-11-06	1711-26724-003	0.800 ppb
2017-11-06	1711-26724-005	1.10 ppb
2017-11-06	1711-26724-007	1.40 ppb
2018-02-12	1802-03280-001	ND
2018-02-12	1802-03287-001	0.700 ppb
2018-02-12	1802-03287-003	ND
2018-02-12	1802-03287-005	0.500 ppb
2018-02-12	1802-03287-007	0.900 ppb
2018-05-14	1805-11004-001	1.50 ppb
2018-05-14	1805-11004-003	0.600 ppb
2018-05-14	1805-11004-005	1.30 ppb
2018-05-14	1805-11004-007	0.800 ppb
2018-08-06	1808-19527-001	0.700 ppb
2018-08-06	1808-19527-003	0.800 ppb
2018-08-06	1808-19527-005	1.40 ppb
2018-08-06	1808-19527-007	1.90 ppb
2018-11-09	1811-29367-001	0.800 ppb
2018-11-09	1811-29367-003	0.900 ppb
2018-11-09	1811-29367-006	0.600 ppb
2018-11-09	1811-29367-008	1.30 ppb
2019-02-11	1902-03312-001	0.500 ppb
2019-02-11	1902-03312-003	0.600 ppb
2019-02-11	1902-03312-005	0.600 ppb
2019-02-11	1902-03312-007	0.900 ppb
2019-02-15	1902-03733-001	ND
2019-05-13	1905-10826-001	1.10 ppb
2019-05-13	1905-10826-003	0.600 ppb
2019-05-13	1905-10826-005	0.900 ppb
2019-05-13	1905-10826-007	1.30 ppb
2019-08-12	1908-20206-001	0.600 ppb
2019-08-12	1908-20206-003	0.600 ppb
2019-08-12	1908-20206-005	0.800 ppb
2019-08-12	1908-20206-007	1.30 ppb
2019-11-12	1911-29427-001	0.500 ppb
2019-11-12	1911-29427-003	0.800 ppb
2019-11-12	1911-29427-005	1.10 ppb
2019-11-19	1911-30066-001	1.40 ppb
2019-11-25	1911-30668-001	0.900 ppb