Round Lake

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

Trophically, Round Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. A maximum depth of 31 ft puts Round Lake in the middle of Wisconsin's depth distribution. Round Lake is small — 31 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Among the 66 graded lakes in Oconto County, Round Lake ranks 4 — in the top quartile locally.

Eurasian watermilfoil is established at Round Lake, which can dampen recreational access and pressure the native plant community. The lake's fish records list 1 species — a varied community without one dominant gamefish. A documented public access point at Round Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.