Dichlorodifluoromethane

City of San Diego

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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107

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	ND	18	ND
2015	ND	17	ND
2016	ND	24	ND
2017	ND	17	ND
2018	ND	22	ND
2019	ND	9	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-05	9437-001-0000	ND
2014-02-05	9437-001-0000	ND
2014-02-05	9437-006-0000	ND
2014-02-05	9437-006-0000	ND
2014-02-05	9437-010-0000	ND
2014-02-05	9437-010-0000	ND
2014-05-07	9437-001-0000	ND
2014-05-07	9437-001-0000	ND
2014-05-07	9437-006-0000	ND
2014-05-07	9437-006-0000	ND
2014-05-07	9437-010-0000	ND
2014-05-07	9437-010-0000	ND
2014-08-06	9437-001-0000	ND
2014-08-06	9437-006-0000	ND
2014-08-06	9437-010-0000	ND
2014-11-05	9437-001-0000	ND
2014-11-05	9437-006-0000	ND
2014-11-05	9437-010-0000	ND
2015-02-04	9437-001-0000	ND
2015-02-04	9437-010-0000	ND
2015-05-06	9437-001-0000	ND
2015-05-06	9437-001-0000	ND
2015-05-06	9437-006-0000	ND
2015-05-06	9437-006-0000	ND
2015-05-06	9437-010-0000	ND
2015-05-06	9437-010-0000	ND
2015-08-05	9437-001-0000	ND
2015-08-05	9437-006-0000	ND
2015-08-05	9437-010-0000	ND
2015-11-18	9437-001-0000	ND
2015-11-18	9437-001-0000	ND
2015-11-18	9437-006-0000	ND
2015-11-18	9437-006-0000	ND
2015-11-18	9437-010-0000	ND
2015-11-18	9437-010-0000	ND
2016-02-08	9437-001-0000	ND
2016-02-08	9437-001-0000	ND
2016-02-08	9437-006-0000	ND
2016-02-08	9437-006-0000	ND
2016-02-08	9437-010-0000	ND
2016-02-08	9437-010-0000	ND
2016-05-04	9437-001-0000	ND
2016-05-04	9437-001-0000	ND
2016-05-04	9437-006-0000	ND
2016-05-04	9437-006-0000	ND
2016-05-04	9437-010-0000	ND
2016-05-04	9437-010-0000	ND
2016-08-03	9437-001-0000	ND
2016-08-03	9437-006-0000	ND
2016-08-03	9437-010-0000	ND
2016-08-04	9437-001-0000	ND
2016-08-04	9437-006-0000	ND
2016-08-04	9437-010-0000	ND
2016-11-02	9437-001-0000	ND
2016-11-02	9437-001-0000	ND
2016-11-02	9437-006-0000	ND
2016-11-02	9437-006-0000	ND
2016-11-02	9437-010-0000	ND
2016-11-02	9437-010-0000	ND
2017-02-01	9437-001-0000	ND
2017-02-01	9437-001-0000	ND
2017-02-01	9437-006-0000	ND
2017-02-01	9437-006-0000	ND
2017-02-01	9437-010-0000	ND
2017-02-01	9437-010-0000	ND
2017-05-03	9437-001-0000	ND
2017-05-03	9437-001-0000	ND
2017-05-03	9437-006-0000	ND
2017-05-03	9437-006-0000	ND
2017-05-03	9437-010-0000	ND
2017-05-03	9437-010-0000	ND
2017-11-01	9437-001-0000	ND
2017-11-01	9437-001-0000	ND
2017-11-01	9437-006-0000	ND
2017-11-01	9437-006-0000	ND
2017-11-01	9437-010-0000	ND
2018-02-07	9437-001-0000	ND
2018-02-07	9437-006-0000	ND
2018-02-07	9437-010-0000	ND
2018-02-07	9437-030-0000	ND
2018-05-09	9437-030-0000	ND
2018-05-09	0007-030-0810	ND
2018-05-21	9437-001-0000	ND
2018-05-21	9437-006-0000	ND
2018-05-21	9437-010-0000	ND
2018-08-01	9437-001-0000	ND
2018-08-01	9437-006-0000	ND
2018-08-01	9437-010-0000	ND
2018-09-05	9437-030-0000	ND
2018-09-05	0007-030-0915	ND
2018-11-06	0007-030-0930	ND
2018-11-14	9437-001-0000	ND
2018-11-14	0007-001-0655	ND
2018-11-14	9437-006-0000	ND
2018-11-14	0007-006-1025	ND
2018-11-14	9437-010-0000	ND
2018-11-14	0007-010-0745	ND
2018-11-14	9437-030-0000	ND
2019-05-08	9437-001-0000	ND
2019-05-08	9437-001-0000	ND
2019-05-08	9437-006-0000	ND
2019-05-08	9437-006-0000	ND
2019-05-08	9437-010-0000	ND
2019-05-08	9437-010-0000	ND
2019-08-07	9437-001-0000	ND
2019-08-07	9437-006-0000	ND
2019-08-07	9437-010-0000	ND