Lk Superior Siskiwit Bay 0.15 Mi Siskiwit R Mouth Lake

Lk Superior Siskiwit Bay 0.15 Mi Siskiwit R Mouth Lake sits at the top of the Wisconsin DNR grading rubric with an A, a mark reached by the cleanest lakes in Wisconsin. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

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. Within the 55 graded lakes of Bayfield County, Lk Superior Siskiwit Bay 0.15 Mi Siskiwit R Mouth Lake sits at rank 42, near the bottom of the county list.

No invasive species are currently listed at Lk Superior Siskiwit Bay 0.15 Mi Siskiwit R Mouth Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Lk Superior Siskiwit Bay 0.15 Mi Siskiwit R Mouth 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.