Greene County Lake Quality
Wisconsin, 1 lakes, average grade B (Good)
Greene County has 1 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. With an average grade of B, Greene County sits comfortably above the Indiana 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 Wwl-04 Lake (B); the most-stressed is Wwl-04 Lake (B).
Quick Answers for Greene County
Planning a trip? Check special fishing regulations for Wwl-04 Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Greene County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Wwl-04 Lake | B | 5.7 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.