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LakeQuality

Minong Flowage Lake vs Stone Lake

Water quality, depth, fish species, and recreation comparison.

Stone Lake has a higher water quality grade (A, Excellent) than Minong Flowage Lake (C, Fair). Both are in Washburn County, Wisconsin.

Both Minong Flowage Lake and Stone Lake sit in Wisconsin. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. Stone Lake (A) is materially cleaner than Minong Flowage Lake (C). A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.

For a recreational visitor, the wider grade gap is decisive — Stone Lake is the better water-quality choice. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?

C

Minong Flowage Lake

Washburn County, Wisconsin

Murky, only visible to about 3.5 ft.

A

Stone Lake

Washburn County, Wisconsin

Crystal clear, you can see 23 ft down.

Side-by-Side Metrics

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

MetricMinong Flowage LakeStone Lake
Overall GradeC (Fair)A (Excellent)
Water Clarity3.5 ft23 ft
Phosphorus37.2 µg/L10.8 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth21 ft49 ft
Surface Area1.6K acres490 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophicoligotrophic

Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).

Verdict

Stone Lake wins on overall water quality with a Grade A versus Minong Flowage Lake's Grade C. Water clarity: 23 ft vs 3.5 ft. For fishing diversity, Stone Lake also leads with 0 species.