Otsego County Lake Quality
Wisconsin, 1 lakes, average grade B (Good)
Only 1 lakes in Otsego 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, Otsego County sits comfortably above the New York median.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Canadarago Lake (B) is the cleanest in the county.
Quick Answers for Otsego County
Planning a trip? Check special fishing regulations for Canadarago Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Otsego County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Canadarago Lake | B | 10.3 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.