Sargent County Lake Quality
Wisconsin, 3 lakes, average grade D (Poor)
Sargent County has 3 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. On average, Sargent County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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 Silver Lake (C); the most-stressed is Sprague Lake (F).
Quick Answers for Sargent County
Planning a trip? Check special fishing regulations for Silver Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Sargent County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Silver Lake | C | 5.9 ft | - | - |
| 2 | Alkali Lake | C | 4.6 ft | - | - |
| 3 | Sprague Lake | F | 1.6 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.