Keith County Lake Quality
Nebraska, 2 lakes, average grade C (Fair)
Keith County has 2 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. Keith County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
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 C W Mcconaughy (B); the most-stressed is Lake Ogallala (C).
Quick Answers for Keith County
Planning a trip? Check special fishing regulations for Lake C W Mcconaughy — or check the official Nebraska fishing regulations.
All Lakes in Keith County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake C W Mcconaughy | B | 7.2 ft | 56.6 µg/L |
| 2 | Lake Ogallala | C | 4.9 ft | 52.2 µg/L |
Other Counties in Nebraska
See how Keith County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
Where to stay near Keith County
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Source: EPA National Aquatic Resource Surveys, 2026.