PFOS + PFOA + PFHxS + PFNA
Sammamish Plateau Water and Sewer
12
Samples
0
Samples exceeding legal limit (MCL)
12
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 33.1 ppt | 8 | 8 | 8.80 ppt - 88.1 ppt |
| 2023 | 16.4 ppt | 4 | 4 | 10.7 ppt - 30.0 ppt |
ppt = parts per trillion
State, National, and Health Guidelines for Drinking Water
ppt = parts per trillion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2022-02-16 | 4260279 | 37.7 ppt |
| 2022-02-16 | 4260285 | 8.80 ppt |
| 2022-02-16 | 4260285 | 8.80 ppt |
| 2022-02-16 | 4260210 | 83.9 ppt |
| 2022-02-16 | 4260224 | 13.1 ppt |
| 2022-02-16 | 4260216 | 88.1 ppt |
| 2022-02-16 | 4260267 | 10.9 ppt |
| 2022-02-16 | 4260284 | 13.3 ppt |
| 2023-03-13 | 4455244 | 13.7 ppt |
| 2023-03-13 | 4455246 | 11.3 ppt |
| 2023-03-13 | 4455245 | 30.0 ppt |
| 2023-03-13 | 4455243 | 10.7 ppt |