Greeley County Lake Quality
Nebraska, 1 lake, average grade A (Excellent)
Greeley County has 1 monitored lake — 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. Every one of those lake carries an A–F grade, so the county-level summary covers the full set rather than a monitored subset. On average, Greeley County lakes grade an A. That puts it near the top of the Nebraska county ranking.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Davis Creek Reservoir (A) is the cleanest in the county.
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Quick Answers for Greeley County
Planning a trip? Check special fishing regulations for Davis Creek Reservoir — or check the official Nebraska fishing regulations.
All Lakes in Greeley County
1 lake1 graded lake
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | ADavis Creek ReservoirGreeley | A | 3.9 ft | No recent samples | 4.1 µg/L | No recent samples | ✓ Public |
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Other Counties in Nebraska
See how Greeley County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: EPA National Aquatic Resource Surveys, 2026.