Sammamish Plateau Water & Sewer
PWSID WA5340900 · Sammamish, Washington · serves 79,362 people · surface water source
C
Fair
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFHxS | 16.5 ppt | 10 ppt | 6/26/2023 |
| PFHxS | 13.1 ppt | 10 ppt | 11/21/2023 |
| PFOS | 11.1 ppt | 4 ppt | 6/26/2023 |
| PFBS | 8.8 ppt | — | 6/26/2023 |
| PFOS | 8.2 ppt | 4 ppt | 11/21/2023 |
| PFHxS | 7.1 ppt | 10 ppt | 5/15/2023 |
| PFHxS | 6.8 ppt | 10 ppt | 11/21/2023 |
| PFBS | 6.7 ppt | — | 11/21/2023 |
| PFHxS | 6 ppt | 10 ppt | 6/26/2023 |
| PFBS | 5.3 ppt | — | 6/26/2023 |
| PFBS | 5.3 ppt | — | 11/21/2023 |
| PFOS | 4.3 ppt | 4 ppt | 5/15/2023 |
| PFHxS | 4.3 ppt | 10 ppt | 11/6/2023 |
| PFHxA | 4.3 ppt | — | 6/26/2023 |
| PFOS | 4.2 ppt | 4 ppt | 11/6/2023 |
| PFPeS | 4.1 ppt | — | 6/26/2023 |
| PFBS | 4 ppt | — | 5/15/2023 |
| PFPeA | 3.9 ppt | — | 6/26/2023 |
| PFHxS | 3.7 ppt | 10 ppt | 8/7/2023 |
| PFBS | 3.5 ppt | — | 11/6/2023 |
| PFHxS | 3.4 ppt | 10 ppt | 2/12/2024 |
| PFHxA | 3.2 ppt | — | 11/21/2023 |
| PFHxS | 3.1 ppt | 10 ppt | 11/6/2023 |
| PFPeA | 3 ppt | — | 11/21/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
No violations on record in the period covered. 🎉