OLD UNION WATER SYSTEM
PWS ID: MS0410033 · SHANNON, Mississippi 38868
PFAS Detected
1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
3,749
Total Violations
787
Health-Based Violations
18
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Public/Private
- Connections
- 1,420
- County
- Lee
- School/Daycare
- No
- MCL Violations
- 18
- Monitoring Violations
- 750
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Uranium | MR | 216 | 2011 |
| Radium-228 | MR | 168 | 2012 |
| Radium-226 | MR | 148 | 2012 |
| Gross Alpha, Excl. Radon and U | MR | 84 | 2008 |
| Combined Radium (-226 and -228) | MR | 84 | 2008 |
| Coliform (TCR) | MCL | 18 | 2011 |
| Consumer Confidence Rule | Other | 14 | 2020 |
| Nitrate | MR | 11 | 2023 |
| Nitrite | MR | 11 | 2023 |
| Nitrate-Nitrite | MR | 11 | 2023 |
| Chlorine | MR | 6 | 2005 |
| Lead and Copper Rule | MR | 4 | 2022 |
| Coliform (TCR) | MR | 3 | 1995 |
| Public Notice | Other | 3 | 2025 |
| TTHM | MR | 2 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2024 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 105 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NMeFOSAA | 6/3/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTA | 6/3/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFTrDA | 6/3/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 6/3/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTA | 4/15/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFTrDA | 4/15/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NMeFOSAA | 4/15/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| lithium | 4/15/2025 | 24.8000 µg/L | 9 µg/L | Detected |
| NEtFOSAA | 4/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| lithium | 4/15/2025 | 24.6000 µg/L | 9 µg/L | Detected |
| PFTA | 4/15/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 4/15/2025 | 13.5000 µg/L | 9 µg/L | Detected |
| NMeFOSAA | 4/15/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 4/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 4/15/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| 6:2 FTS | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFEESA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 10/15/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFBA | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpS | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 10/15/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| NMeFOSAA | 10/15/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 10/15/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 10/15/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFPeS | 10/15/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDoA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 10/15/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFMBA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFPeA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 10/15/2025 | 21.7000 µg/L | 9 µg/L | Detected |
| PFHpA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOS | 10/15/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 10/15/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFMPA | 10/15/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 11Cl-PF3OUdS | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBS | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| ADONA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 10/15/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDoA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 10/15/2025 | <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.