McClain County Lake Quality
Oklahoma, 1 lakes, average grade (Not rated)
McClain County has 1 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters.
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 Wiley Post Memorial Lake (—); the most-stressed is Wiley Post Memorial Lake (—).
Quick Answers for McClain County
Planning a trip? Check special fishing regulations for Wiley Post Memorial Lake — or check the official Oklahoma fishing regulations.
All Lakes in McClain County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Wiley Post Memorial Lake | 0.5 ft | - |
Other Counties in Oklahoma
See how McClain 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 McClain County
Top-rated places to stay near McClain County
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Source: EPA National Aquatic Resource Surveys, 2026.