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LakeQuality

Gile Flowage Lake vs Turtle Flambeau Flowage Lake

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

Turtle Flambeau Flowage Lake has a higher water quality grade (B, Good) than Gile Flowage Lake (C, Fair). Both are in Iron County, Wisconsin.

Both Gile Flowage Lake and Turtle Flambeau Flowage 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. The grades are close: Gile Flowage Lake (C) and Turtle Flambeau Flowage Lake (B) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.

With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.

C

Gile Flowage Lake

Iron County, Wisconsin

Murky, only visible to about 4.5 ft.

B

Turtle Flambeau Flowage Lake

Iron County, Wisconsin

Murky, only visible to about 6 ft.

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.

MetricGile Flowage LakeTurtle Flambeau Flowage Lake
Overall GradeC (Fair)B (Good)
Water Clarity4.5 ft6 ft
Phosphorus30.6 µg/L19.7 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth--
Surface Area3.3K acres13.8K acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophicmesotrophic

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

Verdict

Turtle Flambeau Flowage Lake wins on overall water quality with a Grade B versus Gile Flowage Lake's Grade C. Water clarity: 6 ft vs 4.5 ft. For fishing diversity, Turtle Flambeau Flowage Lake also leads with 0 species.