Bass Lake: Northwest Basin

Bass Lake: Northwest Basin sits at the top of the Minnesota PCA grading rubric with an A, a mark reached by the cleanest lakes in Minnesota. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI value of 33 puts Bass Lake: Northwest Basin in the oligotrophic range, where biological productivity stays low and the water column remains clear. 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. Bass Lake: Northwest Basin ranks 28 of 86 in Beltrami County — solidly in the upper half of the local distribution.

No invasive species are currently listed at Bass Lake: Northwest Basin — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Bass Lake: Northwest Basin, 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.