Sumter County Lake Quality
Alabama, 3 lakes, average grade C (Fair)
Only 3 lakes in Sumter 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 Dems Lake (B); the most-stressed is Gaig Lake (C).
Quick Answers for Sumter County
Planning a trip? Check special fishing regulations for Dems Lake — or check the official Alabama fishing regulations.
All Lakes in Sumter County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Dems Lake | B | 2.7 ft | 24 µg/L |
| 2 | Gaig Lake | C | 3 ft | 25 µg/L |
| 3 | Cofc Lake | C | 2.9 ft | 26 µg/L |
Other Counties in Alabama
See how Sumter 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 Sumter County
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Source: EPA National Aquatic Resource Surveys, 2026.