Columbia City Of (Sc4010001)
PWSID SC4010001 · Columbia, South Carolina · serves 354,068 people · surface water source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| HFPO-DA | 9.2 ppt | 10 ppt | 12/19/2024 |
| PFOS | 8.6 ppt | 4 ppt | 9/23/2025 |
| PFOS | 8.3 ppt | 4 ppt | 8/21/2025 |
| HFPO-DA | 8.2 ppt | 10 ppt | 3/20/2025 |
| HFPO-DA | 7.8 ppt | 10 ppt | 9/23/2025 |
| HFPO-DA | 7.7 ppt | 10 ppt | 9/23/2025 |
| PFOS | 7.2 ppt | 4 ppt | 12/19/2024 |
| PFOS | 7.1 ppt | 4 ppt | 12/19/2024 |
| HFPO-DA | 7.1 ppt | 10 ppt | 6/25/2025 |
| PFOA | 6.9 ppt | 4 ppt | 9/23/2025 |
| PFPeA | 6.8 ppt | — | 9/23/2025 |
| PFOS | 6.6 ppt | 4 ppt | 3/20/2025 |
| PFOS | 6.2 ppt | 4 ppt | 3/20/2025 |
| PFOA | 6.1 ppt | 4 ppt | 12/19/2024 |
| PFPeA | 5.7 ppt | — | 12/19/2024 |
| PFHxA | 5.7 ppt | — | 9/23/2025 |
| PFHxA | 5.4 ppt | — | 12/19/2024 |
| PFOA | 5.4 ppt | 4 ppt | 8/21/2025 |
| PFPeA | 5.4 ppt | — | 8/21/2025 |
| PFBS | 5.2 ppt | — | 9/23/2025 |
| PFOA | 4.8 ppt | 4 ppt | 3/20/2025 |
| PFBS | 4.6 ppt | — | 12/19/2024 |
| PFHxA | 4.5 ppt | — | 8/21/2025 |
| PFOA | 4.5 ppt | 4 ppt | 12/19/2024 |
| PFOA | 4.2 ppt | 4 ppt | 3/20/2025 |
| PFPeA | 4.1 ppt | — | 12/19/2024 |
| PFBS | 3.9 ppt | — | 8/21/2025 |
| PFHxA | 3.9 ppt | — | 12/19/2024 |
| PFPeA | 3.9 ppt | — | 6/25/2025 |
| PFPeA | 3.8 ppt | — | 3/20/2025 |
| PFHxA | 3.7 ppt | — | 3/20/2025 |
| PFPeA | 3.6 ppt | — | 9/23/2025 |
| PFPeA | 3.5 ppt | — | 3/20/2025 |
| PFBS | 3.5 ppt | — | 3/20/2025 |
| PFHxA | 3.5 ppt | — | 3/20/2025 |
| PFHxA | 3.5 ppt | — | 9/23/2025 |
| PFHxA | 3.4 ppt | — | 6/25/2025 |
| PFHpA | 3 ppt | — | 9/23/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2024-12-01 | Chlorite | MCL | Yes | Resolved |