La Salle
PWSID IL0990300 · La Salle, Illinois · serves 9,700 people · groundwater source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBA | 6.7 ppt | — | 10/15/2025 |
| PFBA | 5.2 ppt | — | 4/7/2025 |
| PFBS | 3.1 ppt | — | 10/15/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-10-01 | Total Haloacetic Acids (HAA5) | MR | No | Resolved |
| 2024-06-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2024-04-01 | Chlorine | MR | No | Resolved |
| 2023-10-01 | Lead and Copper Rule | MR | No | Resolved |
| 2022-07-01 | TTHM | MCL | Yes | Resolved |
| 2022-04-01 | TTHM | MCL | Yes | Resolved |
| 2022-01-01 | TTHM | MCL | Yes | Resolved |