Steuben County Lake Quality
Wisconsin, 4 lakes, average grade C (Fair)
Only 4 lakes in Steuben 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. Steuben County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
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 Loon Lake (A); the most-stressed is Smith Pond (D).
Quick Answers for Steuben County
Planning a trip? Check special fishing regulations for Loon Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Steuben County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Loon Lake | A | 14.8 ft | - | - |
| 2 | Lake Demons | B | 11.8 ft | - | - |
| 3 | Smith Pond | D | 3.9 ft | - | - |
| 4 | Lake Salubria | D | 5.8 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.