Chloromethane

California American Water Company - Lincoln Oaks

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	Range of results
2014	ND	1	ND
2015	ND	39	ND
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	N/A	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
2014-07-01	5810-022-0920	ND
2015-02-02	28254801	ND
2015-02-02	28255701	ND
2015-02-03	28256801	ND
2015-02-03	28256701	ND
2015-02-04	28255201	ND
2015-02-04	28256301	ND
2015-02-10	28257001	ND
2015-02-10	28256001	ND
2015-02-12	28256601	ND
2015-02-12	28256401	ND
2015-02-17	28255401	ND
2015-02-17	28257101	ND
2015-02-19	28256201	ND
2015-02-19	28256901	ND
2015-02-24	28256101	ND
2015-02-25	28255101	ND
2015-02-27	28255901	ND
2015-05-27	28255801	ND
2015-06-09	29303701	ND
2015-06-17	29303901	ND
2015-08-10	30016301	ND
2015-08-10	30013601	ND
2015-08-10	30013201	ND
2015-08-10	30016001	ND
2015-08-11	30015201	ND
2015-08-11	30014801	ND
2015-08-11	30012901	ND
2015-08-11	30014201	ND
2015-08-13	30013901	ND
2015-08-13	30015701	ND
2015-08-13	30016801	ND
2015-08-18	30014601	ND
2015-08-18	29303801	ND
2015-08-18	30016701	ND
2015-08-19	30015001	ND
2015-08-19	30013401	ND
2015-08-24	30015401	ND
2015-08-25	30016601	ND
2015-12-07	30878501	ND