Plummer Lake

On the LakeGrade rubric, Plummer Lake pulls an A: clarity at 59.1 ft and 12 µg/L of phosphorus put it in the top bracket for Wisconsin. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. The lake's 85 ft maximum depth is in the upper tier for Wisconsin — deep enough for cold-water fish to find refuge in summer. At 219 acres, Plummer Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. Within Vilas County's 202 graded waters, Plummer Lake sits at rank 30, near the top of the local distribution.

No invasive species are currently listed at Plummer Lake — the lake remains off the Wisconsin infested-waters roster. The fishery includes walleye alongside the lake's other 5 documented species — a notable draw for Wisconsin anglers. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.