Stewart County Lake Quality
Tennessee, 4 lakes, average grade C (Fair)
Only 4 lakes in Stewart 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 Nla Lake (C); the most-stressed is Cumberland River Lake (D).
Quick Answers for Stewart County
Planning a trip? Check special fishing regulations for Nla Lake — or check the official Tennessee fishing regulations.
All Lakes in Stewart County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Nla Lake | C | 4.1 ft | 39.8 µg/L |
| 2 | Kentucky Lake | C | - | 31 µg/L |
| 3 | Cumberland River Lake | C | - | 82.6 µg/L |
| 4 | Cumberland River Lake | D | - | 92.2 µg/L |
Other Counties in Tennessee
See how Stewart 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 Stewart County
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Source: EPA National Aquatic Resource Surveys, 2026.