Wilson County Lake Quality
North Carolina, 4 lakes, average grade D (Poor)
Wilson County has 4 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. The county-wide average grade is D — water quality issues are persistent across most of the monitored basins. 1 lakes fall into the F bracket outright.
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 Toisnot Reservoir (C); the most-stressed is Lake Wilson (F).
Quick Answers for Wilson County
Planning a trip? Check special fishing regulations for Toisnot Reservoir — or check the official North Carolina fishing regulations.
All Lakes in Wilson County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Toisnot Reservoir | C | - | 90 µg/L |
| 2 | Buckhorn Reservoir | D | - | 40 µg/L |
| 3 | Wiggins Mill Reservoir | D | - | 70 µg/L |
| 4 | Lake Wilson | F | - | 100 µg/L |
Other Counties in North Carolina
See how Wilson 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 Wilson County
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Source: EPA National Aquatic Resource Surveys, 2026.