Dibromochloromethane

Warwick

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

152

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	0.625 ppb	8	7	ND - 0.800 ppb
2015	0.0844 ppb	32	2	ND - 1.40 ppb
2016	0.406 ppb	32	9	ND - 1.70 ppb
2017	0.1000 ppb	32	3	ND - 1.10 ppb
2018	0.0375 ppb	32	1	ND - 1.20 ppb
2019	ND	16	0	ND

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
2014-11-17	1411-25799-001	0.700 ppb
2014-11-17	1411-25799-002	0.700 ppb
2014-11-17	1411-25799-003	0.700 ppb
2014-11-17	1411-25799-004	0.700 ppb
2014-11-17	1411-25799-005	0.600 ppb
2014-11-17	1411-25799-006	0.800 ppb
2014-11-17	1411-25799-007	ND
2014-11-17	1411-25799-008	0.800 ppb
2015-02-19	1502-03456-001T	ND
2015-02-19	1502-03456-002T	ND
2015-02-19	1502-03456-003T	ND
2015-02-19	1502-03456-004T	ND
2015-02-19	1502-03456-005T	ND
2015-02-19	1502-03456-006T	ND
2015-02-19	1502-03456-007T	ND
2015-02-19	1502-03456-008T	ND
2015-05-20	1506-10278-001	ND
2015-05-20	1506-10278-002	ND
2015-05-20	1506-10278-003	ND
2015-05-20	1506-10278-004	ND
2015-05-20	1506-10278-005	ND
2015-05-20	1506-10278-006	ND
2015-05-20	1506-10278-007	ND
2015-05-20	1506-10278-008	ND
2015-08-20	1508-17876-001	ND
2015-08-20	1508-17876-002	ND
2015-08-20	1508-17876-003	ND
2015-08-20	1508-17876-004	ND
2015-08-20	1508-17876-005	ND
2015-08-20	1508-17876-006	ND
2015-08-20	1508-17876-007	ND
2015-08-20	1508-17876-008	ND
2015-11-18	1511-25132-001	1.40 ppb
2015-11-18	1511-25132-002	ND
2015-11-18	1511-25132-003	ND
2015-11-18	1511-25132-004	ND
2015-11-18	1511-25132-005	ND
2015-11-18	1511-25132-006	ND
2015-11-18	1511-25132-007	1.30 ppb
2015-11-18	1511-25132-008	ND
2016-02-19	1602-03944-001	1.40 ppb
2016-02-19	1602-03944-002	ND
2016-02-19	1602-03944-003	1.70 ppb
2016-02-19	1602-03944-004	1.30 ppb
2016-02-19	1602-03944-005	1.50 ppb
2016-02-19	1602-03944-006	ND
2016-02-19	1602-03944-007	1.60 ppb
2016-02-19	1602-03944-008	ND
2016-05-18	1605-11352-001	ND
2016-05-18	1605-11352-002	ND
2016-05-18	1605-11352-003	ND
2016-05-18	1605-11352-004	ND
2016-05-18	1605-11352-005	ND
2016-05-18	1605-11352-006	ND
2016-05-19	1605-11495-001	ND
2016-05-19	1605-11495-002	ND
2016-08-17	1608-19355-001	ND
2016-08-17	1608-19355-002	ND
2016-08-17	1608-19355-003	ND
2016-08-17	1608-19355-004	ND
2016-08-17	1608-19355-005	ND
2016-08-17	1608-19355-006	ND
2016-08-17	1608-19355-007	ND
2016-08-17	1608-19355-008	ND
2016-11-22	1611-27451-001	ND
2016-11-22	1611-27451-002	1.60 ppb
2016-11-22	1611-27451-003	ND
2016-11-22	1611-27451-004	ND
2016-11-23	1611-27521-001	1.50 ppb
2016-11-23	1611-27521-002	ND
2016-11-23	1611-27521-003	1.20 ppb
2016-11-23	1611-27521-004	1.20 ppb
2017-02-16	1702-03359-001	ND
2017-02-16	1702-03359-002	1.000 ppb
2017-02-16	1702-03359-003	ND
2017-02-16	1702-03359-004	ND
2017-02-16	1702-03359-005	ND
2017-02-16	1702-03359-006	ND
2017-02-16	1702-03359-007	1.10 ppb
2017-02-16	1702-03359-008	ND
2017-05-18	1705-10525-001	ND
2017-05-18	1705-10525-002	ND
2017-05-18	1705-10525-003	ND
2017-05-18	1705-10525-004	ND
2017-05-18	1705-10525-005	1.10 ppb
2017-05-19	1705-10598-001	ND
2017-05-19	1705-10598-002	ND
2017-05-19	1705-10598-003	ND
2017-08-23	1708-18233-001	ND
2017-08-23	1708-18233-002	ND
2017-08-23	1708-18233-003	ND
2017-08-23	1708-18233-004	ND
2017-08-23	1708-18233-005	ND
2017-08-23	1708-18233-006	ND
2017-08-23	1708-18233-007	ND
2017-08-24	1708-18359-001	ND
2017-11-29	1711-25825-001	ND
2017-11-29	1711-25825-002	ND
2017-11-29	1711-25825-003	ND
2017-11-29	1711-25825-004	ND
2017-11-29	1711-25825-005	ND
2017-11-29	1711-25825-006	ND
2017-11-29	1711-25825-007	ND
2017-11-29	1711-25825-008	ND
2018-02-15	1802-03427-001	ND
2018-02-15	1802-03427-002	ND
2018-02-15	1802-03427-003	ND
2018-02-15	1802-03427-004	ND
2018-02-15	1802-03427-005	ND
2018-02-15	1802-03427-006	ND
2018-02-15	1802-03427-007	1.20 ppb
2018-02-15	1802-03427-008	ND
2018-05-15	1805-10139-001	ND
2018-05-15	1805-10139-002	ND
2018-05-15	1805-10139-003	ND
2018-05-15	1805-10139-004	ND
2018-05-15	1805-10139-005	ND
2018-05-15	1805-10139-006	ND
2018-05-15	1805-10139-007	ND
2018-05-16	1805-10246-001	ND
2018-08-17	1808-17631-001	ND
2018-08-17	1808-17631-002	ND
2018-08-17	1808-17631-003	ND
2018-08-17	1808-17631-004	ND
2018-08-17	1808-17631-005	ND
2018-08-17	1808-17631-006	ND
2018-08-17	1808-17631-007	ND
2018-08-17	1808-17631-008	ND
2018-11-15	1811-24577-001	ND
2018-11-15	1811-24577-002	ND
2018-11-15	1811-24577-003	ND
2018-11-15	1811-24577-004	ND
2018-11-15	1811-24577-005	ND
2018-11-15	1811-24577-006	ND
2018-11-15	1811-24577-007	ND
2018-11-15	1811-24577-008	ND
2019-02-15	1902-03001-001	ND
2019-02-15	1902-03001-002	ND
2019-02-15	1902-03001-003	ND
2019-02-15	1902-03001-004	ND
2019-02-15	1902-03001-005	ND
2019-02-15	1902-03001-006	ND
2019-02-15	1902-03001-007	ND
2019-02-15	1902-03001-008	ND
2019-08-15	1908-15426-001	ND
2019-08-15	1908-15426-002	ND
2019-08-15	1908-15426-003	ND
2019-08-15	1908-15426-004	ND
2019-08-15	1908-15426-005	ND
2019-08-15	1908-15426-006	ND
2019-08-15	1908-15426-007	ND
2019-08-15	1908-15426-008	ND