Community Water System · PWS OK2004207
Logan Co RWD #1
Operator location Guthrie, Oklahoma - 34% of 316 violations are health-based (upper-third health share (> 23%)); surface water source; 8,907 served per SDWIS.
- 8,907
- People served (this PWS)
- 316
- EPA violations (this PWS)
- 107
- Health-based (this PWS)
- 5 PFAS
- UCMR5 (this PWS)
Logan Co RWD #1 standing, high SDWIS violation third
34% of 316 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 34% is upper-third health share (> 23%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #5,175 of 29,740 among systems serving 500+.
The verdict
Logan Co RWD #1 sits in the upper third of the sitemap cohort by violation count (316), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (8,907; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 34% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 detected 5 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- #5,175 of 29,740
- Population · /systems
- #57 of 558
- Population · OK
- 316
- Total EPA violations on record
- 34%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
5 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 4,424
- County
- Logan
- School/Daycare
- No
- MCL Violations
- 105
- Monitoring Violations
- 193
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Uranium | MCL | 60 | 2012 |
| Gross Alpha, Excl. Radon and U | MCL | 36 | 2011 |
| Coliform (TCR) | MCL | 9 | 1991 |
| 1,2,4-Trichlorobenzene | MR | 9 | 2012 |
| Xylenes, Total | MR | 9 | 2012 |
| o-Dichlorobenzene | MR | 9 | 2012 |
| p-Dichlorobenzene | MR | 9 | 2012 |
| 1,1-Dichloroethylene | MR | 9 | 2012 |
| 1,2-Dichloroethane | MR | 9 | 2012 |
| 1,1,1-Trichloroethane | MR | 9 | 2012 |
| 1,2-Dichloropropane | MR | 9 | 2012 |
| 1,1,2-Trichloroethane | MR | 9 | 2012 |
| Tetrachloroethylene | MR | 9 | 2012 |
| CHLOROBENZENE | MR | 9 | 2012 |
| Ethylbenzene | MR | 9 | 2012 |
| cis-1,2-Dichloroethylene | MR | 9 | 2012 |
| DICHLOROMETHANE | MR | 9 | 2012 |
| trans-1,2-Dichloroethylene | MR | 9 | 2012 |
| Carbon tetrachloride | MR | 9 | 2012 |
| Trichloroethylene | MR | 9 | 2012 |
| Benzene | MR | 9 | 2012 |
| Styrene | MR | 9 | 2012 |
| Vinyl chloride | MR | 9 | 2012 |
| Toluene | MR | 9 | 2012 |
| Glyphosate | MR | 4 | 2005 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
Violation Count vs. the National Corpus
Logan Co RWD #1 has 316 recorded EPA violations, 91% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 9% carry more. 34% of this system's own violations are health-based (107 of 316), and it ranks #5,175 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)
316 Higher than most more violations than 91% 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. 17 of 812 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 11Cl-PF3OUdS | 9/9/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 9/9/2024 | 5.90 ppt | 3.00 ppt | Detected |
| PFHpA | 9/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 9/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 9/9/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/9/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 9/9/2024 | 4.10 ppt | 4.00 ppt | Detected |
| PFDA | 9/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 9/9/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 9/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/9/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| HFPO-DA | 9/9/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 9/9/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 9/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/9/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 9/9/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 9/9/2024 | 7.40 ppt | 3.00 ppt | Detected |
| PFMBA | 9/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 9/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/9/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 9/9/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 9/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 9/9/2024 | 6.30 ppt | 3.00 ppt | Detected |
| PFBA | 9/9/2024 | 8.90 ppt | 5.00 ppt | Detected |
| PFTrDA | 7/9/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 7/9/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| NMeFOSAA | 7/9/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 7/9/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 7/9/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 7/9/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 7/9/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTA | 7/9/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/9/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 7/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 7/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 7/9/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 7/9/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 7/9/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 7/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 7/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 7/9/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 7/9/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/9/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBS | 7/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 7/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 7/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 7/9/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 7/9/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 7/9/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Logan Co RWD #1
107 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OK2004207.
Sources: EPA SDWIS
Nationwide peers
316 violations · 8,907 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 Logan Co RWD #1
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.