Silverthorne Town Of
PWSID CO0159095 · Silverthorne, Colorado · serves 8,400 people · groundwater source
B
Good
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBS | 5.9 ppt | — | 10/6/2025 |
| PFBS | 4.5 ppt | — | 4/7/2025 |
| PFBS | 4.4 ppt | — | 4/7/2025 |
| PFHxS | 3.7 ppt | 10 ppt | 10/6/2025 |
| PFHxS | 3.6 ppt | 10 ppt | 4/7/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-07-01 | Consumer Confidence Rule | Other | No | Resolved |
| 2024-01-01 | TTHM | MR | No | Resolved |
| 2024-01-01 | Total Haloacetic Acids (HAA5) | MR | No | Resolved |