Greene County Lake Quality
Wisconsin, 3 lakes, average grade C (Fair)
Only 3 lakes in Greene 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. Greene 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 Fellows Lake (B); the most-stressed is Lake Springfield (D).
Quick Answers for Greene County
Planning a trip? Check special fishing regulations for Fellows 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 | Fellows Lake | B | 7.2 ft | - | 12 µg/L |
| 2 | James R. Just Ab. Lake Springfield | B | 4.2 ft | - | 23.8 µg/L |
| 3 | Lake Springfield | D | 1.6 ft | - | 67.8 µg/L |
Source: EPA National Aquatic Resource Surveys, 2026.