Ralls County Pwsd 1
PWSID MO2024499 · Hannibal, Missouri · serves 7,662 people · groundwater source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBA | 79.9 ppt | — | 12/15/2025 |
| PFBA | 70.1 ppt | — | 8/12/2025 |
| PFBS | 11.4 ppt | — | 8/12/2025 |
| PFBS | 11 ppt | — | 12/15/2025 |
| PFOA | 6.3 ppt | 4 ppt | 12/15/2025 |
| PFOA | 4.3 ppt | 4 ppt | 8/12/2025 |
| PFPeA | 3.5 ppt | — | 12/15/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2023-01-01 | TTHM | MCL | Yes | Resolved |
| 2022-10-01 | TTHM | MCL | Yes | Resolved |
| 2022-07-01 | TTHM | MCL | Yes | Resolved |
| 2022-04-01 | TTHM | MCL | Yes | Resolved |