Johnston Co-West
PWSID NC0351070 · Smithfield, North Carolina · serves 99,027 people · surface water source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBA | 15.6 ppt | — | 12/4/2024 |
| PFOS | 14.1 ppt | 4 ppt | 12/4/2024 |
| PFOS | 10.7 ppt | 4 ppt | 9/3/2025 |
| PFOS | 10.2 ppt | 4 ppt | 9/3/2025 |
| PFBA | 9.2 ppt | — | 12/4/2024 |
| PFHxA | 9.2 ppt | — | 12/4/2024 |
| PFPeA | 9.2 ppt | — | 12/4/2024 |
| PFOS | 8.5 ppt | 4 ppt | 12/4/2024 |
| PFOS | 8.5 ppt | 4 ppt | 3/18/2025 |
| PFBA | 8.4 ppt | — | 12/4/2024 |
| PFOS | 8.3 ppt | 4 ppt | 9/3/2025 |
| PFOS | 8.1 ppt | 4 ppt | 12/4/2024 |
| PFBA | 7.9 ppt | — | 4/30/2025 |
| PFOA | 7.6 ppt | 4 ppt | 12/4/2024 |
| PFOS | 7.5 ppt | 4 ppt | 4/16/2025 |
| PFHxA | 6.7 ppt | — | 12/4/2024 |
| PFOA | 6.6 ppt | 4 ppt | 12/4/2024 |
| PFOA | 6.3 ppt | 4 ppt | 12/4/2024 |
| PFOS | 6.2 ppt | 4 ppt | 4/16/2025 |
| PFOS | 6 ppt | 4 ppt | 3/18/2025 |
| PFOA | 5.8 ppt | 4 ppt | 3/18/2025 |
| PFPeA | 5.6 ppt | — | 12/4/2024 |
| PFOS | 5.5 ppt | 4 ppt | 3/18/2025 |
| PFOA | 5.5 ppt | 4 ppt | 9/3/2025 |
| PFPeA | 5.5 ppt | — | 12/4/2024 |
| PFHxS | 5.3 ppt | 10 ppt | 12/4/2024 |
| PFOS | 5.2 ppt | 4 ppt | 4/30/2025 |
| PFHxA | 5.2 ppt | — | 12/4/2024 |
| PFOA | 5.1 ppt | 4 ppt | 9/3/2025 |
| PFHxA | 5.1 ppt | — | 3/18/2025 |
| PFBA | 5 ppt | — | 4/16/2025 |
| PFHpA | 5 ppt | — | 12/4/2024 |
| PFPeA | 4.9 ppt | — | 9/3/2025 |
| PFOA | 4.9 ppt | 4 ppt | 9/3/2025 |
| PFHxS | 4.8 ppt | 10 ppt | 12/4/2024 |
| PFPeA | 4.8 ppt | — | 3/18/2025 |
| PFPeA | 4.7 ppt | — | 9/3/2025 |
| PFBS | 4.5 ppt | — | 12/4/2024 |
| PFHpA | 4.5 ppt | — | 4/30/2025 |
| PFHxS | 4.4 ppt | 10 ppt | 4/30/2025 |
| PFHxA | 4.4 ppt | — | 9/3/2025 |
| PFBS | 4.4 ppt | — | 12/4/2024 |
| PFHxA | 4.4 ppt | — | 9/3/2025 |
| PFHxA | 4.3 ppt | — | 4/16/2025 |
| PFPeA | 4.2 ppt | — | 4/16/2025 |
| PFOA | 4.2 ppt | 4 ppt | 4/16/2025 |
| PFOA | 4.1 ppt | 4 ppt | 3/18/2025 |
| PFPeA | 4 ppt | — | 4/30/2025 |
| PFHxA | 3.8 ppt | — | 4/16/2025 |
| PFBS | 3.8 ppt | — | 12/4/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-02-11 | Revised Total Coliform Rule | RPT | No | Resolved |