Trichlorofluoromethane
City of Puyallup
NOTE: City of Puyallup purchases water from City of Tacoma which is required to test for trichlorofluoromethane. Sample information shown below was taken by City of Tacoma.
Trichlorofluoromethane (Freon 11) 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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 1,300 ppb
The EWG Health Guideline of 1,300 ppb for trichlorofluoromethane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.
ppb = parts per billion
All test results
NOTE: City of Puyallup purchases water from City of Tacoma which is required to test for trichlorofluoromethane. Sample information shown below was taken by City of Tacoma.
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-07 | ND | |
| 2018-03-12 | ND | |
| 2018-03-19 | ND | |
| 2019-01-02 | ND | |
| 2019-07-24 | ND | |
| 2019-12-03 | ND | |
| 2021-06-21 | 4137307 | ND |
| 2021-06-21 | 4137308 | ND |
| 2021-06-21 | 4137309 | ND |
| 2021-06-21 | 4233773 | ND |
| 2021-06-30 | 4142811 | ND |
| 2022-09-15 | 4368469 | ND |
| 2022-09-23 | 4368470 | ND |
| 2022-10-11 | 4363364 | ND |
| 2022-11-15 | 4428454 | ND |
| 2022-11-16 | 4388597 | ND |
| 2023-06-20 | 4542958 | ND |
| 2023-07-12 | 4542960 | ND |
| 2023-07-12 | 4542959 | ND |