St John's Water (Sc1020002)
PWSID SC1020002 · Johns Island, South Carolina · serves 22,592 people · surface water source
C
Fair
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 8.5 ppt | 4 ppt | 7/24/2025 |
| PFOS | 7.2 ppt | 4 ppt | 10/1/2025 |
| PFOS | 6.7 ppt | 4 ppt | 4/22/2025 |
| PFOS | 6.4 ppt | 4 ppt | 1/6/2025 |
| PFPeA | 5.6 ppt | — | 10/1/2025 |
| PFOA | 5.4 ppt | 4 ppt | 10/1/2025 |
| PFPeA | 5.2 ppt | — | 7/24/2025 |
| PFOA | 5.1 ppt | 4 ppt | 4/22/2025 |
| PFOA | 5 ppt | 4 ppt | 7/24/2025 |
| PFHxA | 4.9 ppt | — | 10/1/2025 |
| PFPeA | 4.8 ppt | — | 4/22/2025 |
| PFBS | 4.5 ppt | — | 10/1/2025 |
| PFPeA | 4.4 ppt | — | 1/6/2025 |
| PFBS | 4.4 ppt | — | 7/24/2025 |
| PFHxA | 4.3 ppt | — | 4/22/2025 |
| PFOA | 4.2 ppt | 4 ppt | 1/6/2025 |
| PFBS | 4.2 ppt | — | 4/22/2025 |
| PFHxA | 4.2 ppt | — | 7/24/2025 |
| PFHxA | 4.1 ppt | — | 1/6/2025 |
| PFBS | 3.9 ppt | — | 1/6/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
No violations on record in the period covered. 🎉