TRI-COUNTY RWD #2
PWS ID: OK2006362 · EARLSBORO, Oklahoma 74840
PFAS Detected
3 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
5,172
Total Violations
167
Health-Based Violations
14
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 2,332
- County
- Pottawatomie
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 144
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 48 | 2013 |
| Coliform (TCR) | MCL | 12 | 2013 |
| Lead and Copper Rule | MR | 9 | 2011 |
| Nitrate-Nitrite | MR | 7 | 2024 |
| E. COLI | MR | 6 | 2017 |
| Arsenic | MR | 6 | 2011 |
| Chromium | MR | 4 | 2011 |
| Nickel | MR | 4 | 2011 |
| Gross Alpha, Excl. Radon and U | MR | 4 | 2008 |
| Combined Uranium | MR | 4 | 2008 |
| Gross Beta Particle Activity | MR | 4 | 2008 |
| Fluoride | MR | 4 | 2011 |
| Combined Radium (-226 and -228) | MR | 4 | 2008 |
| Revised Total Coliform Rule | MON | 4 | 2021 |
| Consumer Confidence Rule | Other | 4 | 2016 |
| Beryllium, Total | MR | 4 | 2011 |
| Cadmium | MR | 4 | 2011 |
| Chlorine | MR | 4 | 2021 |
| Barium | MR | 4 | 2011 |
| CYANIDE | MR | 4 | 2011 |
| Mercury | MR | 4 | 2011 |
| Thallium, Total | MR | 4 | 2011 |
| Antimony, Total | MR | 4 | 2011 |
| Selenium | MR | 4 | 2011 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 8 of 180 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NFDHA | 4/14/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFTA | 4/14/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFPeS | 4/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFEESA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 4/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 4:2 FTS | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTrDA | 4/14/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 4/14/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| 6:2 FTS | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpS | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 4/14/2025 | 17.0000 µg/L | 9 µg/L | Detected |
| PFDoA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 4/14/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 8:2 FTS | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 4/14/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFBA | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBS | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 4/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 4/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 4/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| ADONA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 4/14/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 4/14/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 4/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeS | 4/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 4/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 6:2 FTS | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBS | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 4/14/2025 | 0.0220 µg/L | 0.003 µg/L | Detected |
| PFHpA | 4/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOS | 4/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFTA | 4/14/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFBA | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| HFPO-DA | 4/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 4/14/2025 | <0.006 µg/L | 0.006 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.