Halfmoon Lake

On the scoring rubric Halfmoon Lake grades a D: clarity at 5.1 ft and phosphorus readings still being added keep it in the lower bracket for Wabasha County.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. 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 2 graded lakes in Wabasha County, Halfmoon Lake sits at rank 1, above the county median.

Halfmoon Lake has no invasive species recorded in Minnesota state databases as of 2023, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Halfmoon 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.