Adair County Lake Quality
Oklahoma, 1 lakes, average grade (Not rated)
Only 1 lakes in Adair 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 Stilwell City Lake (—); the most-stressed is Stilwell City Lake (—).
Quick Answers for Adair County
Planning a trip? Check special fishing regulations for Stilwell City Lake — or check the official Oklahoma fishing regulations.
All Lakes in Adair County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Stilwell City Lake | 3 ft | - |
Other Counties in Oklahoma
See how Adair 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 Adair County
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Source: EPA National Aquatic Resource Surveys, 2026.