Indian Lake

Indian Lake earns a D — measurements through 2025 show persistent nutrient pressure that limits clarity through the summer. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

The hypereutrophic status — TSI 72 — reflects sustained heavy nutrient loading from the surrounding watershed and frequent algal pressure. 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. Within Dane County's 23 graded lakes, Indian Lake ranks 13 — below the local median, though not at the bottom.

No invasive species are currently listed at Indian Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Indian 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.