Perry County Lake Quality
Wisconsin, 3 lakes, average grade B (Good)
Only 3 lakes in Perry 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, Perry County sits comfortably above the Missouri 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. Port Perry Lake (A) is the cleanest in the county.
Quick Answers for Perry County
Planning a trip? Check special fishing regulations for Port Perry Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Perry County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Port Perry Lake | A | 12 ft | - | 8.3 µg/L |
| 2 | Port Perry Lake North Arm | B | 7.4 ft | - | 9.5 µg/L |
| 3 | Port Perry Lake South Arm | B | 9.5 ft | - | 8.3 µg/L |
Source: EPA National Aquatic Resource Surveys, 2026.