Polk County Lake Quality
North Carolina, 1 lakes, average grade B (Good)
Polk County has 1 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. With an average grade of B, Polk County sits comfortably above the {{stateName}} median.
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 Adger (B); the most-stressed is Lake Adger (B).
Quick Answers for Polk County
Planning a trip? Check special fishing regulations for Lake Adger — or check the official North Carolina fishing regulations.
All Lakes in Polk County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Adger | B | - | - |
Other Counties in North Carolina
See how Polk County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 12 states.
Where to stay near Polk County
Top-rated places to stay near Polk County
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Source: EPA National Aquatic Resource Surveys, 2026.