Tillman County Lake Quality
Oklahoma, 1 lakes, average grade (Not rated)
Only 1 lakes in Tillman County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Lake Frederick (—); the most-stressed is Lake Frederick (—).
Quick Answers for Tillman County
Planning a trip? Check special fishing regulations for Lake Frederick — or check the official Oklahoma fishing regulations.
All Lakes in Tillman County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Frederick | 1.3 ft | - |
Other Counties in Oklahoma
See how Tillman County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 36 states and 2 Canadian provinces.
Where to stay near Tillman County
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Source: EPA National Aquatic Resource Surveys, 2026.