Sioux City Water Supply
PWSID IA9778054 · Sioux City, Iowa · serves 85,791 people · surface water source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFHxS | 35 ppt | 10 ppt | 1/16/2024 |
| PFHxS | 35 ppt | 10 ppt | 4/16/2024 |
| PFHxA | 33 ppt | — | 1/16/2024 |
| PFHxS | 29 ppt | 10 ppt | 7/15/2024 |
| PFHxA | 28 ppt | — | 7/15/2024 |
| PFHxA | 23 ppt | — | 10/16/2023 |
| PFHxS | 22 ppt | 10 ppt | 10/16/2023 |
| PFPeA | 22 ppt | — | 1/16/2024 |
| PFPeA | 22 ppt | — | 4/16/2024 |
| PFBS | 21 ppt | — | 1/16/2024 |
| PFBS | 20 ppt | — | 4/16/2024 |
| PFPeA | 18 ppt | — | 7/15/2024 |
| PFBS | 17 ppt | — | 7/15/2024 |
| PFBS | 14 ppt | — | 10/16/2023 |
| PFPeA | 14 ppt | — | 10/16/2023 |
| PFPeS | 14 ppt | — | 1/16/2024 |
| PFPeS | 12 ppt | — | 4/16/2024 |
| PFPeS | 11 ppt | — | 7/15/2024 |
| PFBA | 9.2 ppt | — | 7/15/2024 |
| PFBA | 8.4 ppt | — | 1/16/2024 |
| PFPeS | 8.1 ppt | — | 10/16/2023 |
| PFBA | 7.9 ppt | — | 4/16/2024 |
| PFOA | 6 ppt | 4 ppt | 1/16/2024 |
| PFBA | 5.8 ppt | — | 10/16/2023 |
| PFOA | 5.4 ppt | 4 ppt | 4/16/2024 |
| PFHpA | 4.8 ppt | — | 1/16/2024 |
| PFOS | 4.3 ppt | 4 ppt | 1/16/2024 |
| PFHpA | 4.3 ppt | — | 7/15/2024 |
| PFOS | 4.1 ppt | 4 ppt | 4/16/2024 |
| PFHxA | 3.4 ppt | — | 4/16/2024 |
| PFHpA | 3.2 ppt | — | 10/16/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2024-05-01 | Total Haloacetic Acids (HAA5) | MR | No | Resolved |
| 2024-05-01 | TTHM | MR | No | Resolved |