Big Doctor Lake

On the scoring rubric Big Doctor Lake grades a D: clarity at 4.3 ft and phosphorus readings still being added keep it in the lower bracket for Burnett County. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. 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. Big Doctor Lake ranks 54 of 57 in Burnett County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Big Doctor Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Big Doctor Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.