Community Water System · PWS OK2006362
Tri-County RWD #2
Operator location Earlsboro, Oklahoma - UCMR5 detected 2 PFAS compounds (lower-third PFAS panel (≤ 2 compounds)) on this PWS; SDWIS lists 167 violations and 5,172 people served.
- 5,172
- People served (this PWS)
- 167
- EPA violations (this PWS)
- 14
- Health-based (this PWS)
- 2 PFAS
- UCMR5 (this PWS)
Tri-County RWD #2 standing, high SDWIS violation third
UCMR5 detected 2 PFAS compounds - lower-third PFAS panel (≤ 2 compounds). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 8% is middle-third health share (≤ 23%). UCMR5: lower-third PFAS panel (≤ 2 compounds). Population rank #7,563 of 29,740 among systems serving 500+.
The verdict
Tri-County RWD #2 sits in the upper third of the sitemap cohort by violation count (167), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (5,172; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 8% (middle-third health share (≤ 23%)). UCMR5 detected 2 PFAS compounds (lower-third PFAS panel (≤ 2 compounds)).
- #7,563 of 29,740
- Population · /systems
- #96 of 558
- Population · OK
- 167
- Total EPA violations on record
- 8%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
2 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
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 |
Violation Count vs. the National Corpus
Tri-County RWD #2 has 167 recorded EPA violations, 83% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 17% carry more. 8% of this system's own violations are health-based (14 of 167), and it ranks #7,563 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
167 Higher than most more violations than 83% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 7 of 174 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NFDHA | 4/14/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFTA | 4/14/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFPeS | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 4:2 FTS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 4/14/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 4/14/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| 6:2 FTS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeS | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 6:2 FTS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 4/14/2025 | 22.00 ppt | 3.00 ppt | Detected |
| PFHpA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTA | 4/14/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFBA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 4/14/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTrDA | 4/14/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
UCMR5 PFAS record for Tri-County RWD #2
Open EPA SDWIS federal reports for PWS OK2006362 to cross-check UCMR5 detections and violation codes; state primacy agencies enforce the Safe Drinking Water Act locally.
Sources: EPA SDWIS
Nationwide peers
167 violations · 5,172 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Tri-County RWD #2
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Oklahoma compares on the same EPA violation measures. Oklahoma systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.