Clear Lake

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

Trophically, Clear 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's surface area is not consistently recorded across state datasets — physical context remains partial. Clear Lake ranks 2 of 4 in Rock County — solidly in the upper half of the local distribution.

No invasive species are currently listed at Clear Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Clear Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. 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.