Round Lake

Round Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Waushara County. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. 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 74 acres, with partial shoreline records and little volume to buffer nutrient inputs. Among the 30 graded lakes in Waushara County, Round Lake ranks 7 — in the top quartile locally.

Eurasian watermilfoil is established at Round Lake, which can dampen recreational access and pressure the native plant community. Walleye are documented at Round Lake, one of 4 fish species on record for the lake. Public access is available — the lake is on the Wisconsin DNR public-access list. 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.