DeKalb County Lake Quality
Wisconsin, 6 lakes, average grade F (Very Poor)
Only 6 lakes in DeKalb 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. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.
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 Pony Express Lake (D); the most-stressed is Cameron Lake Deep Site (F).
Quick Answers for DeKalb County
Planning a trip? Check special fishing regulations for Pony Express Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in DeKalb County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Pony Express Lake | D | 1.3 ft | - | 53.2 µg/L |
| 2 | Buffalo Bill Lake Nr. Access | D | - | - | 71.3 µg/L |
| 3 | Buffalo Bill Lake 0.4 Mi From Dam | D | 2.2 ft | - | 50 µg/L |
| 4 | Cameron Lake Deep Site | F | 1.9 ft | - | 103 µg/L |
| 5 | King Lake | F | 0.6 ft | - | 186 µg/L |
| 6 | Cameron Lake Nr. Dam | F | 1.6 ft | - | 128.5 µg/L |
Source: EPA National Aquatic Resource Surveys, 2026.