Community Water System · PWS OK3002138
Delaware Co RWD # 7
Operator location Afton, Oklahoma - 79% of 98 violations are health-based (upper-third health share (> 23%)); surface water source; 400 served per SDWIS.
- 400
- People served (this PWS)
- 98
- EPA violations (this PWS)
- 77
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Delaware Co RWD # 7 standing, high SDWIS violation third
79% of 98 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 79% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected.
The verdict
Delaware Co RWD # 7 sits in the upper third of the sitemap cohort by violation count (98), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (400; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 79% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- 98
- Total EPA violations on record
- 79%
- Health-based (MCL / treatment failure)
- 400
- People served by this PWS (SDWIS)
- 0
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 433
- County
- Delaware
- School/Daycare
- No
- MCL Violations
- 77
- Monitoring Violations
- 21
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 61 | 2025 |
| TTHM | MCL | 16 | 2017 |
| Total Haloacetic Acids (HAA5) | MR | 8 | 2025 |
| Coliform (TCR) | MR | 7 | 2009 |
| Lead and Copper Rule | MR | 4 | 2017 |
| TTHM | MR | 2 | 2017 |
Violation Count vs. the National Corpus
Delaware Co RWD # 7 has 98 recorded EPA violations, 73% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 27% carry more. 79% of this system's own violations are health-based (77 of 98), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
98 Around the middle fewer violations than 27% 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. 0 of 62 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFOS | 9/22/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| HFPO-DA | 9/22/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/22/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/22/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 9/22/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 9/22/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 9/22/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 9/22/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDA | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 9/22/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 9/22/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 9/22/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 9/22/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 9/22/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFHpS | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/22/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 9/22/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 9/22/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 9/22/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 9/22/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTA | 5/19/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 5/19/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| NMeFOSAA | 5/19/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 5/19/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 1/14/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFDoA | 1/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 1/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 1/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 1/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 1/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 1/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 1/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 1/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 1/14/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 1/14/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| 4:2 FTS | 1/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 1/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 1/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 1/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 1/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 1/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
Health-based violations on Delaware Co RWD # 7
77 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OK3002138.
Sources: EPA SDWIS
Nationwide peers
98 violations · 400 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.
What to do with Delaware Co RWD # 7
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.