CITY OF WESLACO
PWS ID: TX1080011 · WESLACO, Texas 78596-6158
PFAS Detected
7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
40,033
Total Violations
27
Health-Based Violations
3
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 12,361
- County
- Hidalgo
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 11
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 5 | 2022 |
| TTHM | MR | 4 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2014 |
| Public Notice | Other | 4 | 2025 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
| Interim Enhanced Surface Water Treatment Rule | MR | 1 | 2008 |
| Chlorite | MR | 1 | 2014 |
| Surface Water Treatment Rule | TT | 1 | 1993 |
| Lead and Copper Rule | MR | 1 | 2013 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 18 of 95 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFDA | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 9/2/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 9/2/2025 | 36.1000 µg/L | 9 µg/L | Detected |
| PFBS | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 9/2/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 9/2/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDoA | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 9/2/2025 | 0.0062 µg/L | 0.003 µg/L | Detected |
| PFUnA | 9/2/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 9/2/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 9/2/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NMeFOSAA | 9/2/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTrDA | 9/2/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFOS | 9/2/2025 | 0.0050 µg/L | 0.004 µg/L | Detected |
| NEtFOSAA | 9/2/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| HFPO-DA | 9/2/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpS | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 9/2/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NFDHA | 9/2/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 9/2/2025 | 0.0059 µg/L | 0.003 µg/L | Detected |
| PFMPA | 9/2/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 8:2 FTS | 9/2/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 9/2/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 9/2/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 9/2/2025 | 0.0063 µg/L | 0.005 µg/L | Detected |
| PFDoA | 5/6/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 5/6/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTrDA | 5/6/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 5/6/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 5/6/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| lithium | 5/6/2025 | 29.8000 µg/L | 9 µg/L | Detected |
| PFHxS | 5/6/2025 | 0.0041 µg/L | 0.003 µg/L | Detected |
| PFOS | 5/6/2025 | 0.0051 µg/L | 0.004 µg/L | Detected |
| PFHxA | 5/6/2025 | 0.0048 µg/L | 0.003 µg/L | Detected |
| PFBA | 5/6/2025 | 0.0076 µg/L | 0.005 µg/L | Detected |
| PFBS | 5/6/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 5/6/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFTA | 5/6/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| 6:2 FTS | 5/6/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpS | 5/6/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 5/6/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 5/6/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 5/6/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 5/6/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 5/6/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
PFAS data from EPA UCMR5 monitoring program (2023-2025).
This data is provided for informational purposes only.