Clinton County Lake Quality
Wisconsin, 6 lakes, average grade C (Fair)
Only 6 lakes in Clinton 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. Clinton 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 Park Lake (B); the most-stressed is Lake Ovid (D).
Quick Answers for Clinton County
Planning a trip? Check special fishing regulations for Park Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Clinton County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Park Lake | B | 10.5 ft | - | - |
| 2 | Park Lake North Central Basin; Bath Township | B | 9.5 ft | - | - |
| 3 | Lake Victoria | C | 9 ft | - | - |
| 4 | Victoria Lake North of Central Island; Victor Township | C | 9 ft | - | - |
| 5 | Lake Ovid North Basin; Ovid Township | C | 6 ft | - | - |
| 6 | Lake Ovid | D | 6.5 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.