Ynp-Old Faithful
PWSID WY5680085 · Yellowstone, Wyoming · serves 7,745 people · surface water source
F
Failing
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-01-01 | CYANIDE | MR | No | Archived |
| 2024-07-01 | Lead and Copper Rule | MR | No | Resolved |
| 2024-07-01 | Lead and Copper Rule | TT | Yes | Resolved |
| 2024-06-01 | Lead and Copper Rule | TT | Yes | Resolved |
| 2024-03-01 | Lead and Copper Rule | TT | Yes | Resolved |
| 2023-12-30 | Lead and Copper Rule | MR | No | Resolved |
| 2023-11-30 | Lead and Copper Rule | TT | Yes | Resolved |
| 2023-10-01 | Lead and Copper Rule | MR | No | Resolved |
| 2023-10-01 | Arsenic | MCL | Yes | Resolved |
| 2023-07-01 | Arsenic | MCL | Yes | Resolved |
| 2023-07-01 | TTHM | MR | No | Resolved |
| 2023-07-01 | Total Haloacetic Acids (HAA5) | MR | No | Resolved |
| 2023-04-01 | Arsenic | MCL | Yes | Resolved |
| 2022-09-17 | Long Term 2 Enhanced Surface Water Treatment Rule | TT | Yes | Resolved |
| 2022-06-01 | Interim Enhanced Surface Water Treatment Rule | TT | Yes | Resolved |
| 2022-04-01 | Surface Water Treatment Rule | MR | No | Resolved |
| 2022-04-01 | Revised Total Coliform Rule | MON | No | Resolved |