Scott County Lake Quality
Wisconsin, 5 lakes, average grade C (Fair)
Only 5 lakes in Scott 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. Scott 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 Lambach Lake (B); the most-stressed is Lost Grove Lake (C).
Quick Answers for Scott County
Planning a trip? Check special fishing regulations for Lambach Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Scott County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Lambach Lake | B | 7.9 ft | - | - |
| 2 | Railroad Lake | C | 5.1 ft | - | - |
| 3 | Lost Grove Lake | C | 3.9 ft | - | - |
| 4 | Blue Grass Lake | C | 4.5 ft | - | - |
| 5 | Lake of the Hills | C | 5.1 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.