Swan Lake

On the LakeGrade rubric, Swan Lake pulls an A: clarity at 22.1 ft and phosphorus readings still being added put it in the top bracket for Wisconsin. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Trophically, Swan Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake is compact at 27 acres, with partial shoreline records and little volume to buffer nutrient inputs. Among the 34 graded lakes in Walworth County, Swan Lake sits at rank 14, above the county median.

Swan Lake has no invasive species recorded in Wisconsin state databases as of 2022, though prevention practices still apply at all access points. The fishery is bass-led, with 2 documented species across the lake's records. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.