North Lake

North Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. 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's surface area is not consistently recorded across state datasets — physical context remains partial. North Lake ranks 59 of 70 in Burnett County — at the lower end of the locally monitored distribution.

North Lake has no invasive species recorded in Wisconsin state databases as of 2019, though prevention practices still apply at all access points. The state fisheries records do not list documented species for North 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.