Dichlorodifluoromethane

Dover Water Commission

Dichlorodifluoromethane (Freon-12) is a refrigerant, solvent and aerosol propellant banned in 2000 under the Montreal Protocol because of its ozone-depleting properties. Freons can cause heart, nervous system and liver damage.

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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	8	ND
2015	ND	8	ND
2016	ND	8	ND
2017	ND	8	ND
2018	ND	8	ND
2019	ND	8	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-03-05	25734-1A	ND
2014-03-05	25734-2A	ND
2014-06-18	27310-2	ND
2014-06-18	27310-1	ND
2014-09-26	29140-1B	ND
2014-09-26	29140-2B	ND
2014-12-10	30311-16	ND
2014-12-10	30311-17	ND
2015-01-29	30990-2	ND
2015-01-29	30990-1	ND
2015-04-16	DWS243-2	ND
2015-04-16	DWS243-1	ND
2015-09-10	DWS1518-2A	ND
2015-09-10	DWS1518-1A	ND
2015-11-18	DWS1964-1	ND
2015-11-18	DWS1964-2	ND
2016-01-20	DWS2269-1	ND
2016-01-20	DWS2269-2	ND
2016-04-20	DWS2860-1A	ND
2016-04-20	DWS2860-2A	ND
2016-07-11	DWS3345-1	ND
2016-07-11	DWS3345-2	ND
2016-12-09	DWS4357-1A	ND
2016-12-09	DWS4357-2A	ND
2017-03-02	DWS4896-2A	ND
2017-03-02	DWS4896-1A	ND
2017-05-02	DWS5334-2	ND
2017-05-02	DWS5334-1	ND
2017-07-31	DWS6081-2	ND
2017-07-31	DWS6081-1	ND
2017-10-06	DWS6722-1	ND
2017-10-06	DWS6722-2	ND
2018-02-02	DWS7708-2A	ND
2018-02-02	DWS7708-1A	ND
2018-04-26	DWS8495-1	ND
2018-04-26	DWS8494-1	ND
2018-07-06	18070509-02	ND
2018-07-06	18070509-01	ND
2018-11-02	18110119-01	ND
2018-11-02	18110119-02	ND
2019-01-09	19010837-01	ND
2019-01-09	19010837-02	ND
2019-04-17	19041620-01	ND
2019-04-17	19041620-02	ND
2019-07-05	19070333-002	ND
2019-07-05	19070333-001	ND
2019-11-01	19103136-001	ND
2019-11-01	19103136-002	ND