Dichlorodifluoromethane
Holliston 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.
39
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 | 9 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
ppb = parts per billion
All test results
| Date | Result |
|---|---|
| 2014-03-12 | ND |
| 2014-06-12 | ND |
| 2014-06-12 | ND |
| 2014-06-16 | ND |
| 2014-06-16 | ND |
| 2014-06-16 | ND |
| 2014-06-16 | ND |
| 2014-09-09 | ND |
| 2014-11-04 | ND |
| 2015-05-05 | ND |
| 2015-05-05 | ND |
| 2015-05-12 | ND |
| 2015-05-19 | ND |
| 2015-05-19 | ND |
| 2015-05-19 | ND |
| 2016-05-03 | ND |
| 2016-05-03 | ND |
| 2016-05-03 | ND |
| 2016-05-03 | ND |
| 2016-05-24 | ND |
| 2016-05-24 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2018-05-15 | ND |
| 2018-05-15 | ND |
| 2018-05-15 | ND |
| 2018-05-15 | ND |
| 2018-05-15 | ND |
| 2018-05-15 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |