City Of San Juan
PWSID TX1080010 · San Juan, Texas · serves 30,000 people · surface water source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFPeA | 9.2 ppt | — | 2/10/2025 |
| PFHxA | 9 ppt | — | 2/10/2025 |
| PFBA | 8.2 ppt | — | 6/11/2025 |
| PFBA | 7.9 ppt | — | 11/12/2024 |
| PFBA | 7.8 ppt | — | 11/12/2024 |
| PFPeA | 6.8 ppt | — | 11/12/2024 |
| PFBA | 6.8 ppt | — | 2/10/2025 |
| PFPeA | 6.3 ppt | — | 11/12/2024 |
| PFBA | 6.1 ppt | — | 8/27/2025 |
| PFHxA | 6 ppt | — | 11/12/2024 |
| PFHxA | 6 ppt | — | 11/12/2024 |
| PFBA | 5.9 ppt | — | 5/27/2025 |
| PFBA | 5.9 ppt | — | 8/27/2025 |
| PFPeA | 5.7 ppt | — | 8/27/2025 |
| PFPeA | 5.6 ppt | — | 8/27/2025 |
| PFBA | 5.1 ppt | — | 5/27/2025 |
| PFHxA | 5.1 ppt | — | 8/27/2025 |
| PFHxA | 5.1 ppt | — | 8/27/2025 |
| PFPeA | 4.8 ppt | — | 6/11/2025 |
| PFHxA | 4.5 ppt | — | 6/11/2025 |
| PFOS | 4.5 ppt | 4 ppt | 2/10/2025 |
| PFPeA | 3.9 ppt | — | 5/27/2025 |
| PFHxS | 3.9 ppt | 10 ppt | 2/10/2025 |
| PFPeA | 3.7 ppt | — | 5/27/2025 |
| PFHxA | 3.6 ppt | — | 5/27/2025 |
| PFHpA | 3.5 ppt | — | 2/10/2025 |
| PFHxA | 3.5 ppt | — | 5/27/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | LEAD AND COPPER RULE REVISIONS | RPT | No | Resolved |