Sandy Lake

On the LakeGrade scale Sandy Lake grades a B, with clarity readings still being added and 21 µg/L of phosphorus placing it above the Minnesota median. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI near 48 places Sandy Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. 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. Among the 187 graded lakes in St. Louis County, Sandy Lake sits at rank 54, above the county median.

No invasive species are currently listed at Sandy Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Sandy Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Sandy Lake — most use is by shoreline residents and their guests. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.