Kimball County Lake Quality
Nebraska, 1 lakes, average grade C (Fair)
Only 1 lakes in Kimball 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 average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.
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 Oliver Reservoir (C); the most-stressed is Oliver Reservoir (C).
Quick Answers for Kimball County
Planning a trip? Check special fishing regulations for Oliver Reservoir — or check the official Nebraska fishing regulations.
All Lakes in Kimball County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Oliver Reservoir | C | 1.7 ft | 71.9 µg/L |
Other Counties in Nebraska
See how Kimball County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
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Source: EPA National Aquatic Resource Surveys, 2026.