CITY OF RED OAK
PWS ID: TX0700031 · RED OAK, Texas 75154-0393
PFAS Detected
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
18,577
Total Violations
75
Health-Based Violations
6
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 4,832
- County
- Ellis
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 54
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 42 | 2008 |
| Coliform (TCR) | MR | 6 | 2013 |
| E. COLI | MR | 6 | 2011 |
| Coliform (TCR) | MCL | 4 | 1991 |
| Consumer Confidence Rule | Other | 2 | 2004 |
| Fluoride | MCL | 2 | 1979 |
| Public Notice | Other | 1 | 2011 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 13 of 120 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFOS | 8/23/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| HFPO-DA | 8/23/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 8/23/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 8/23/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/23/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 8/23/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 8/23/2023 | 0.0053 µg/L | 0.003 µg/L | Detected |
| PFDoA | 8/23/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 8/23/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 8/23/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFBA | 8/23/2023 | 0.0102 µg/L | 0.005 µg/L | Detected |
| PFNA | 8/23/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDA | 8/23/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 8/23/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 8/23/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 8/23/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 8/23/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 8/23/2023 | 0.0061 µg/L | 0.003 µg/L | Detected |
| PFMBA | 8/23/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 8/23/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 8/23/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 8/23/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpS | 8/23/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 8/23/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| NEtFOSAA | 8/23/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 8/23/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFBS | 8/23/2023 | 0.0045 µg/L | 0.003 µg/L | Detected |
| NMeFOSAA | 8/23/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| lithium | 8/23/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFHxS | 8/23/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 5/3/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 5/3/2023 | <9 µg/L | 9 µg/L | Not Detected |
| NEtFOSAA | 5/3/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 5/3/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NMeFOSAA | 5/3/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFBA | 4/15/2024 | 0.0095 µg/L | 0.005 µg/L | Detected |
| PFMPA | 4/15/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| ADONA | 4/15/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 4/15/2024 | 0.0049 µg/L | 0.003 µg/L | Detected |
| PFHpS | 4/15/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 4/15/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 4/15/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 4/15/2024 | 0.0057 µg/L | 0.003 µg/L | Detected |
| PFHpA | 4/15/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 4/15/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 4/15/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 4/15/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| HFPO-DA | 4/15/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 4/15/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 4/15/2024 | <0.002 µg/L | 0.002 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.