Chlorodifluoromethane
City of Daly City
Chlorodifluoromethane (Freon 22) 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.
20
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | ND | 5 | 0 | ND |
| 2014 | ND | 15 | 0 | ND |
| 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
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2013-11-05 | 1311130-001A | ND |
| 2013-11-05 | 1311127-001A | ND |
| 2013-11-05 | 1311131-001A | ND |
| 2013-11-05 | 1311129-001A | ND |
| 2013-11-05 | 1311128-001A | ND |
| 2014-02-04 | 1402099-001A | ND |
| 2014-02-04 | 1402098-001A | ND |
| 2014-02-04 | 1402097-001A | ND |
| 2014-02-04 | 1402100-001A | ND |
| 2014-02-04 | 1402101-001A | ND |
| 2014-05-07 | 1405258-001A | ND |
| 2014-05-07 | 1405256-001A | ND |
| 2014-05-07 | 1405255-001A | ND |
| 2014-05-07 | 1405259-001A | ND |
| 2014-05-07 | 1405257-001A | ND |
| 2014-08-13 | 1408515-001A | ND |
| 2014-08-13 | 1408520-001A | ND |
| 2014-08-13 | 1408518-001A | ND |
| 2014-08-13 | 1408517-001A | ND |
| 2014-08-13 | 1408519-001A | ND |