Chlorodifluoromethane
Derry Water Department
NOTE: Derry Water Department purchases water from Manchester Water Works which is required to test for chlorodifluoromethane. Sample information shown below was taken by Manchester Water Works.
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.
4
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 | ND | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 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
NOTE: Derry Water Department purchases water from Manchester Water Works which is required to test for chlorodifluoromethane. Sample information shown below was taken by Manchester Water Works.
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-26 | 201403270197AM | ND |
| 2014-06-18 | 201406190252AM | ND |
| 2014-09-09 | 201409100994AM | ND |
| 2014-12-16 | 201412170480AM | ND |