Chloromethane

Spring Grove

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	ND	4	0	ND
2014	ND	6	0	ND
2015	ND	3	0	ND
2016	ND	4	0	ND
2017	0.414 ppb	7	2	ND - 1.70 ppb
2018	0.650 ppb	2	1	ND - 1.30 ppb
2019	ND	4	0	ND

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
2013-01-16	100208P	ND
2013-01-16	100207Q	ND
2013-08-13	102005R	ND
2013-12-18	102194R	ND
2014-03-31	14D0075-01	ND
2014-03-31	14D0074-01	ND
2014-03-31	14D0075-02	ND
2014-03-31	14D0075-03	ND
2014-07-02	14G0201-01	ND
2014-07-02	14G0191-02	ND
2015-08-05	15H0339-01	ND
2015-08-05	15H0343-01	ND
2015-12-07	15L0484-01	ND
2016-03-01	16C0140-01	ND
2016-05-02	16E0150-01	ND
2016-09-27	16I1639-01	ND
2016-12-13	16L0566-01	ND
2017-03-14	17C0677-01	ND
2017-06-21	17F1373-02	1.70 ppb
2017-06-21	17F1373-01	1.20 ppb
2017-08-14	17H1157-02	ND
2017-08-14	17H1157-01	ND
2017-12-07	17L0354-01	ND
2017-12-07	17L0354-02	ND
2018-03-27	18C1000-02	1.30 ppb
2018-10-08	18J0356-02	ND
2019-03-28	19C1258-01	ND
2019-06-27	19F1860-01	ND
2019-09-10	19I0546-01	ND
2019-12-17	19L1037-01	ND