Davis County Lake Quality
Iowa, 2 lakes, average grade D (Poor)
Only 2 lakes in Davis 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. On average, Davis County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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 Wapello (C); the most-stressed is Lake Fisher (F).
Quick Answers for Davis County
Planning a trip? Check special fishing regulations for Lake Wapello — or check the official Iowa fishing regulations.
All Lakes in Davis County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Wapello | C | 7.5 ft | - |
| 2 | Lake Fisher | F | 2 ft | - |
Other Counties in Iowa
See how Davis County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 15 states.
Where to stay near Davis County
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Source: EPA National Aquatic Resource Surveys, 2026.