Dichlorodifluoromethane
Concord Water Department
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.
14
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 | N/A | 0 | 0 | N/A |
| 2014 | ND | 4 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 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 |
|---|---|---|
| 2014-10-31 | 137495.01 | ND |
| 2014-10-31 | 137495.02 | ND |
| 2014-10-31 | 137495.03 | ND |
| 2014-10-31 | 137495.04 | ND |
| 2015-08-07 | 146612.01 | ND |
| 2015-10-15 | 149110.01 | ND |
| 2015-10-15 | 149110.02 | ND |
| 2015-10-15 | 149110.03 | ND |
| 2015-10-15 | 149110.04 | ND |
| 2016-08-05 | 159131.01 | ND |
| 2016-10-07 | 161374.02 | ND |
| 2016-10-07 | 161374.03 | ND |
| 2016-10-07 | 161374.04 | ND |
| 2016-10-07 | 161374.05 | ND |