Dichlorodifluoromethane
City of Palo Alto
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.
9
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 |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-12-14 | 2706-013-0830 | ND |
| 2015-12-14 | 2706-014-0900 | ND |
| 2018-12-20 | 0007-013-1000 | ND |
| 2018-12-20 | 0007-014-0830 | ND |
| 2018-12-20 | 0007-015-0830 | ND |
| 2019-04-08 | 9588-013-1020 | ND |
| 2019-04-08 | 9588-014-0955 | ND |
| 2019-04-08 | 9588-015-0835 | ND |
| 2019-04-08 | 0007-015-0848 | ND |