Dibromochloromethane

Lincoln Water Commission

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	0.438 ppb	8	4	ND - 1.000 ppb
2015	0.144 ppb	16	2	ND - 1.20 ppb
2016	0.525 ppb	16	6	ND - 1.70 ppb
2017	0.344 ppb	16	5	ND - 1.30 ppb
2018	0.488 ppb	16	6	ND - 1.40 ppb
2019	ND	8	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
2014-08-14	1408-18101-004	ND
2014-08-14	1408-18101-003	ND
2014-08-14	1408-18101-002	ND
2014-08-14	1408-18101-001	ND
2014-11-18	1411-25898-004	0.800 ppb
2014-11-18	1411-25898-003	1.000 ppb
2014-11-18	1411-25898-002	0.800 ppb
2014-11-18	1411-25898-001	0.900 ppb
2015-02-18	1502-03327-004T	ND
2015-02-18	1502-03327-001T	ND
2015-02-18	1502-03327-002T	ND
2015-02-18	1502-03327-003T	ND
2015-05-20	1505-10232-004	ND
2015-05-20	1505-10232-003	ND
2015-05-20	1505-10232-002	ND
2015-05-20	1505-10232-001	ND
2015-08-19	1508-17645-001	ND
2015-08-19	1508-17645-002	ND
2015-08-19	1508-17645-004	ND
2015-08-19	1508-17645-003	ND
2015-11-18	1511-25131-004	1.10 ppb
2015-11-18	1511-25131-003	ND
2015-11-18	1511-25131-002	1.20 ppb
2015-11-18	1511-25131-001	ND
2016-02-17	1602-03627-004	1.40 ppb
2016-02-17	1602-03627-003	1.70 ppb
2016-02-17	1602-03627-002	1.60 ppb
2016-02-17	1602-03627-001	1.60 ppb
2016-05-18	1605-11340-004	1.10 ppb
2016-05-18	1605-11340-001	ND
2016-05-18	1605-11340-002	ND
2016-05-18	1605-11340-003	1.000 ppb
2016-08-17	1608-19350-004	ND
2016-08-17	1608-19350-003	ND
2016-08-17	1608-19350-002	ND
2016-08-17	1608-19350-001	ND
2016-11-15	1611-26802-001	ND
2016-11-15	1611-26802-004	ND
2016-11-15	1611-26802-003	ND
2016-11-15	1611-26802-002	ND
2017-02-16	1702-03325-004	1.10 ppb
2017-02-16	1702-03325-003	ND
2017-02-16	1702-03325-002	ND
2017-02-16	1702-03325-001	1.000 ppb
2017-05-17	1705-10340-004	1.000 ppb
2017-05-17	1705-10340-003	1.30 ppb
2017-05-17	1705-10340-002	ND
2017-05-17	1705-10340-001	1.10 ppb
2017-08-16	1708-17659-004	ND
2017-08-16	1708-17659-001	ND
2017-08-16	1708-17659-002	ND
2017-08-16	1708-17659-003	ND
2017-11-15	1711-24880-004	ND
2017-11-15	1711-24880-003	ND
2017-11-15	1711-24880-002	ND
2017-11-15	1711-24880-001	ND
2018-02-15	1802-03385-001	1.40 ppb
2018-02-15	1802-03385-002	1.30 ppb
2018-02-15	1802-03385-004	1.40 ppb
2018-02-15	1802-03385-003	1.30 ppb
2018-05-16	1805-10249-004	1.20 ppb
2018-05-16	1805-10249-003	1.20 ppb
2018-05-16	1805-10249-002	ND
2018-05-16	1805-10249-001	ND
2018-08-16	1808-17515-004	ND
2018-08-16	1808-17515-003	ND
2018-08-16	1808-17515-002	ND
2018-08-16	1808-17515-001	ND
2018-11-14	1811-24373-004	ND
2018-11-14	1811-24373-001	ND
2018-11-14	1811-24373-002	ND
2018-11-14	1811-24373-003	ND
2019-02-13	1902-02802-004	ND
2019-02-13	1902-02802-003	ND
2019-02-13	1902-02802-002	ND
2019-02-13	1902-02802-001	ND
2019-08-14	1908-15310-001	ND
2019-08-14	1908-15310-004	ND
2019-08-14	1908-15310-003	ND
2019-08-14	1908-15310-002	ND