LAGUNA MADRE WATER DISTRICT
PWS ID: TX0310005 · PORT ISABEL, Texas 78578-2404
PFAS Detected
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
46,341
Total Violations
140
Health-Based Violations
98
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 6,474
- County
- Cameron
- School/Daycare
- No
- MCL Violations
- 79
- Monitoring Violations
- 15
- Treatment Tech Violations
- 19
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 55 | 2015 |
| Coliform (TCR) | MCL | 24 | 2014 |
| Interim Enhanced Surface Water Treatment Rule | TT | 17 | 2014 |
| Public Notice | Other | 12 | 2014 |
| Lead and Copper Rule | MR | 5 | 2016 |
| Chlorite | MR | 4 | 2019 |
| Surface Water Treatment Rule | MR | 2 | 2002 |
| Asbestos | MR | 2 | 2004 |
| Consumer Confidence Rule | Other | 2 | 2012 |
| Surface Water Treatment Rule | TT | 2 | 1993 |
| TTHM | MR | 1 | 2009 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2009 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 18 of 240 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFTA | 8/31/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFTrDA | 8/31/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 8/31/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 8/31/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 8/31/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| 9Cl-PF3ONS | 8/31/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 8/31/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 8/31/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| lithium | 8/31/2023 | 43.7000 µg/L | 9 µg/L | Detected |
| PFDoA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFUnA | 8/31/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/31/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHxA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 4:2 FTS | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 8/31/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 8/31/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDoA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 8/31/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFBS | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFTrDA | 8/31/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFOS | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| lithium | 8/31/2023 | 43.4000 µg/L | 9 µg/L | Detected |
| 6:2 FTS | 8/31/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/31/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFEESA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NEtFOSAA | 8/31/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 8/31/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 8/31/2023 | 0.0035 µg/L | 0.003 µg/L | Detected |
| PFMPA | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 8/31/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 4:2 FTS | 8/31/2023 | <0.003 µg/L | 0.003 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.