Wilmington Water Department
PWSID DE0000663 · Wilmington, Delaware · serves 107,976 people · surface water source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFPeA | 32.2 ppt | — | 11/7/2023 |
| PFHxA | 21.1 ppt | — | 11/7/2023 |
| PFPeA | 19.8 ppt | — | 11/7/2023 |
| PFBA | 14.1 ppt | — | 1/31/2024 |
| PFHxA | 13.7 ppt | — | 11/7/2023 |
| PFHxA | 12.3 ppt | — | 1/31/2024 |
| PFPeA | 11.6 ppt | — | 1/31/2024 |
| PFBA | 10.5 ppt | — | 8/9/2023 |
| PFBA | 10.2 ppt | — | 8/9/2023 |
| PFOA | 9.9 ppt | 4 ppt | 1/31/2024 |
| PFOA | 9.1 ppt | 4 ppt | 11/7/2023 |
| PFPeA | 8.6 ppt | — | 8/9/2023 |
| PFOA | 8.5 ppt | 4 ppt | 11/7/2023 |
| PFHpA | 8.4 ppt | — | 1/31/2024 |
| PFPeA | 8.2 ppt | — | 8/9/2023 |
| PFHxA | 7.7 ppt | — | 8/9/2023 |
| PFHxA | 7.7 ppt | — | 8/9/2023 |
| PFOA | 6.8 ppt | 4 ppt | 8/9/2023 |
| PFOA | 6.7 ppt | 4 ppt | 8/9/2023 |
| PFBA | 6.6 ppt | — | 11/7/2023 |
| PFBA | 6.2 ppt | — | 11/7/2023 |
| PFBA | 5.6 ppt | — | 2/8/2023 |
| PFOA | 5.2 ppt | 4 ppt | 2/8/2023 |
| PFOA | 5.2 ppt | 4 ppt | 2/8/2023 |
| PFBA | 5.2 ppt | — | 2/8/2023 |
| PFOA | 5 ppt | 4 ppt | 1/31/2024 |
| PFPeA | 4.8 ppt | — | 2/8/2023 |
| PFPeA | 4.7 ppt | — | 2/8/2023 |
| PFHxA | 4.7 ppt | — | 2/8/2023 |
| PFHxA | 4.6 ppt | — | 2/8/2023 |
| PFHxA | 4.1 ppt | — | 1/31/2024 |
| PFHpA | 4 ppt | — | 8/9/2023 |
| PFPeA | 3.8 ppt | — | 1/31/2024 |
| PFHpA | 3.7 ppt | — | 8/9/2023 |
| PFBS | 3.6 ppt | — | 11/7/2023 |
| PFBS | 3.5 ppt | — | 11/7/2023 |
| PFHpA | 3.4 ppt | — | 11/7/2023 |
| PFHpA | 3.4 ppt | — | 11/7/2023 |
| PFBS | 3.3 ppt | — | 8/9/2023 |
| PFBS | 3 ppt | — | 2/8/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2023-08-01 | Revised Total Coliform Rule | MON | No | Resolved |