Bromochloromethane

City of Friendswood

Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and as a fire extinguishing agent. Disinfection byproducts in drinking water increase the risk of cancer.

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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
2013	0.109 ppb	15	7	ND - 0.380 ppb
2014	ND	3	0	ND
2015	ND	4	0	ND
2016	ND	6	0	ND
2017	ND	4	0	ND
2018	ND	4	0	ND
2019	ND	6	0	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2013-05-01	1305094-009E	0.380 ppb
2013-05-01	1305094-007E	ND
2013-05-01	1305094-011E	ND
2013-05-01	1305094-001E	ND
2013-05-01	1305094-003E	ND
2013-05-01	1305094-005E	ND
2013-05-01	1305094-013E	0.360 ppb
2013-08-22	Q1306099001	0.0785 ppb
2013-11-14	Q1313371001	ND
2013-11-14	Q1313371011	ND
2013-11-14	Q1313371013	0.313 ppb
2013-11-14	Q1313371005	0.0916 ppb
2013-11-14	Q1313371007	ND
2013-11-14	Q1313371003	0.267 ppb
2013-11-14	Q1313371009	0.141 ppb
2014-02-18	Q1404903001	ND
2014-02-20	AC43875	ND
2014-02-20	AC43867	ND
2015-02-05	AC79506	ND
2015-02-05	AC79512	ND
2015-02-05	AC79510	ND
2015-02-05	AC79514	ND
2016-02-04	AD22119	ND
2016-02-04	AD22173	ND
2016-02-04	AD22161	ND
2016-02-04	AD22177	ND
2016-09-28	AD51724	ND
2016-10-26	AD54839	ND
2017-01-19	AD65721	ND
2017-01-19	AD65723	ND
2017-01-19	AD65743	ND
2017-05-03	AD82490	ND
2018-01-29	AE11006	ND
2018-05-21	AE27042	ND
2018-05-21	AE27044	ND
2018-09-17	AE40251	ND
2019-02-04	AE52712	ND
2019-02-04	AE52710	ND
2019-02-04	AE52716	ND
2019-02-04	AE52718	ND
2019-04-22	AE63211	ND
2019-07-15	AE74435	ND