St. Francois County Lake Quality
Wisconsin, 4 lakes, average grade B (Good)
Only 4 lakes in St. Francois 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. With an average grade of B, St. Francois County sits comfortably above the Missouri 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 Lake Capri (A); the most-stressed is Hemitite Lake (F).
Quick Answers for St. Francois County
Planning a trip? Check special fishing regulations for Lake Capri, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in St. Francois County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Lake Capri | A | 16.3 ft | - | 5.7 µg/L |
| 2 | Lake Marseilles-Terre du Lac Lakes | A | 14.1 ft | - | 7.4 µg/L |
| 3 | Timberline Lakes | A | 14.3 ft | - | 5.5 µg/L |
| 4 | Hemitite Lake | F | 1.1 ft | - | 186.9 µg/L |
Source: EPA National Aquatic Resource Surveys, 2026.