Bromodichloromethane

Espanola Water System

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	12	0	ND
2015	0.128 ppb	12	2	ND - 0.950 ppb
2016	0.189 ppb	12	3	ND - 1.01 ppb
2017	0.0657 ppb	16	2	ND - 0.541 ppb
2018	ND	16	0	ND
2019	ND	16	0	ND

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
2014-01-31	1402013-001A	ND
2014-01-31	1402015-001A	ND
2014-01-31	1402016-001A	ND
2014-01-31	1402014-001A	ND
2014-04-29	1404B77-001A	ND
2014-04-29	1404B79-001A	ND
2014-04-29	1404B81-001A	ND
2014-04-29	1404B80-001A	ND
2014-10-31	1410E43-001A	ND
2014-10-31	1410E46-001A	ND
2014-10-31	1410E45-001A	ND
2014-10-31	1410E44-001A	ND
2015-01-27	1501935-001A	ND
2015-01-27	1501937-001A	ND
2015-01-27	1501936-001A	ND
2015-01-27	1501934-001A	ND
2015-03-26	1503C45-001A	ND
2015-03-26	1503C42-001A	ND
2015-03-26	1503C41-001A	ND
2015-03-26	1503C44-001A	ND
2015-07-21	2015021115	ND
2015-07-21	2015021116	ND
2015-07-21	2015021117	0.950 ppb
2015-07-21	2015021114	0.590 ppb
2016-04-19	1604844-001A	ND
2016-04-19	1604842-001A	ND
2016-04-19	1604843-001A	ND
2016-04-19	1604845-001A	ND
2016-07-14	1607761-001A	0.696 ppb
2016-07-14	1607759-001A	ND
2016-07-14	1607762-001A	ND
2016-07-14	1607760-001A	ND
2016-10-13	1610663-001	1.01 ppb
2016-10-13	1610662-001	ND
2016-10-13	1610661-001	ND
2016-10-13	1610660-001	0.564 ppb
2017-01-12	1701558-001	ND
2017-01-12	1701560-001	ND
2017-01-12	1701562-001	ND
2017-01-12	1701563-001	ND
2017-04-13	1704603-001	ND
2017-04-13	1704605-001	ND
2017-04-13	1704602-001	ND
2017-04-13	1704604-001	ND
2017-07-13	1707711-001	ND
2017-07-13	1707712-001	ND
2017-07-13	1707715-001	ND
2017-07-13	1707714-001	ND
2017-10-13	1710848-001	0.541 ppb
2017-10-13	1710845-001	0.510 ppb
2017-10-13	1710849-001	ND
2017-10-13	1710847-001	ND
2018-01-11	1801664-001	ND
2018-01-11	1801663-001	ND
2018-01-11	1801662-001	ND
2018-01-11	1801660-001	ND
2018-04-13	1804794-001	ND
2018-04-13	1804791-001	ND
2018-04-13	1804792-001	ND
2018-04-13	1804793-001	ND
2018-07-12	1807661-001	ND
2018-07-12	1807660-001	ND
2018-07-12	1807659-001	ND
2018-07-12	1807657-001	ND
2018-10-11	1810716-001	ND
2018-10-11	1810717-001	ND
2018-10-11	1810719-001	ND
2018-10-11	1810721-001	ND
2019-01-14	1901534-001	ND
2019-01-14	1901536-001	ND
2019-01-14	1901539-001	ND
2019-01-14	1901540-001	ND
2019-04-04	1904399-001	ND
2019-04-04	1904404-001	ND
2019-04-04	1904402-001	ND
2019-04-04	1904400-001	ND
2019-07-12	1907674-001	ND
2019-07-12	1907677-001	ND
2019-07-12	1907676-001	ND
2019-07-12	1907673-001	ND
2019-10-09	1910605-001	ND
2019-10-09	1910603-001	ND
2019-10-09	1910602-001	ND
2019-10-09	1910601-001	ND