Benson County Lake Quality
Wisconsin, 4 lakes, average grade B (Good)
Only 4 lakes in Benson 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. With an average grade of B, Benson County sits comfortably above the North Dakota 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 Wood Lake (A); the most-stressed is Devils Lake (C).
Quick Answers for Benson County
Planning a trip? Check special fishing regulations for Wood Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Benson County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Wood Lake | A | - | - | 10.9 µg/L |
| 2 | Free Peoples Lake | A | - | - | 18.7 µg/L |
| 3 | Fort Totten Bay Lake | A | - | - | 15.5 µg/L |
| 4 | Devils Lake | C | 3.7 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.