Dyers Lake

The LakeGrade rubric puts Dyers Lake at a C: clarity at 4.9 ft, 22 µg/L of phosphorus, and a TSI of 51 signal an intermediate trophic state. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

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 bottoms out at 23 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 70 acres, Dyers Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Dyers Lake sits at rank 88 of 128 in Cook County, in the lower half of the local distribution.

No invasive species are currently listed at Dyers Lake — the lake remains off the Minnesota infested-waters roster. The fishery is panfish-dominated — bluegill, crappie, and sunfish among the 7 species documented for the lake. The lake lacks a documented public access point, so visitor use is limited. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.