City Of San Marcos
PWSID TX1050001 · San Marcos, Texas · serves 72,970 people · surface water source
C
Fair
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBA | 11.4 ppt | — | 2/26/2024 |
| PFBA | 8.8 ppt | — | 2/26/2024 |
| PFPeA | 4.2 ppt | — | 11/14/2023 |
| PFPeA | 4.2 ppt | — | 11/14/2023 |
| PFPeA | 3.8 ppt | — | 5/21/2024 |
| PFPeA | 3.7 ppt | — | 5/21/2024 |
| PFPeA | 3.7 ppt | — | 8/15/2024 |
| PFPeA | 3.6 ppt | — | 8/15/2024 |
| PFHxS | 3.4 ppt | 10 ppt | 5/21/2024 |
| PFHxS | 3 ppt | 10 ppt | 11/14/2023 |
| PFHxS | 3 ppt | 10 ppt | 2/26/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-10-01 | TTHM | MCL | Yes | Resolved |