Richland County Lake Quality
Wisconsin, 2 lakes, average grade D (Poor)
Richland County has 2 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, Richland 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 Sites Lake (D); the most-stressed is Pleasant Hill Reservoir (F).
Quick Answers for Richland County
Planning a trip? Check special fishing regulations for Sites Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
All Lakes in Richland County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Sites Lake | D | 5.2 ft | - | - |
| 2 | Pleasant Hill Reservoir | F | 3 ft | - | - |
Source: EPA National Aquatic Resource Surveys, 2026.