Pomroy Lake

Pomroy Lake earns a D — measurements through 2022 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.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. At only 11 ft deep, Pomroy Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. At 412 acres, Pomroy Lake fits the Minnesota median for monitored lakes, with 6.1 miles of shoreline. Among the 7 graded lakes in Kanabec County, Pomroy Lake sits at rank 3, above the county median.

Pomroy Lake has no invasive species recorded in Minnesota state databases as of 2022, though prevention practices still apply at all access points. Walleye are documented at Pomroy Lake, one of 9 fish species on record for the lake. Public access is available — the lake is on the Minnesota PCA public-access list. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.