Tuma Lake

Tuma Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Manitowoc County. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Trophically, Tuma Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. A maximum depth of 36 ft puts Tuma Lake in the middle of Wisconsin's depth distribution. The lake is compact at 14 acres, with partial shoreline records and little volume to buffer nutrient inputs. Among the 18 graded lakes in Manitowoc County, Tuma Lake ranks 3 — in the top quartile locally.

Eurasian watermilfoil is established at Tuma Lake, which can dampen recreational access and pressure the native plant community. The fishery is bass-led, with 3 documented species across the lake's records. A documented public access point at Tuma Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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.