Chloromethane

City of Biloxi

Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

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
2013	0.0303 ppb	13	1	ND - 0.394 ppb
2014	0.0442 ppb	13	1	ND - 0.575 ppb
2015	N/A	0	0	N/A
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	N/A	0	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 2.69 ppb

The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date	Lab ID	Result
2013-10-21	754020-10078	ND
2013-10-21	754003-10058	0.394 ppb
2013-10-21	754018-10078	ND
2013-10-21	754022-10078	ND
2013-10-21	754016-10078	ND
2013-10-21	754009-10058	ND
2013-10-21	754007-10058	ND
2013-10-21	754026-10078	ND
2013-10-21	754005-10058	ND
2013-10-21	754024-10078	ND
2013-10-21	754030-10078	ND
2013-10-21	754001-10058	ND
2013-11-13	758659-10296	ND
2014-04-22	781908-11212	ND
2014-04-22	781962-11217	ND
2014-04-22	781940-11212	ND
2014-04-22	781912-11212	ND
2014-04-22	781968-11217	ND
2014-04-22	781932-11212	0.575 ppb
2014-04-22	781910-11212	ND
2014-04-22	781960-11212	ND
2014-04-22	781930-11212	ND
2014-04-22	781934-11217	ND
2014-04-22	781970-11212	ND
2014-04-22	781966-11217	ND
2014-05-05	783994-11315	ND