Oglala Lakota County Lake Quality
South Dakota, 3 lakes, average grade (Not rated)
Oglala Lakota County has 3 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 Kyle Reservoir (—); the most-stressed is Kyle Reservoir (—).
Quick Answers for Oglala Lakota County
Planning a trip? Check special fishing regulations for Kyle Reservoir — or check the official South Dakota fishing regulations.
All Lakes in Oglala Lakota County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Kyle Reservoir | - | - | |
| 2 | White Clay Reservoir | - | - | |
| 3 | Denby Reservoir | - | - |
Other Counties in South Dakota
See how Oglala Lakota 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 Oglala Lakota County
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Source: EPA National Aquatic Resource Surveys, 2026.