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LakeQuality

Tiger Cat Flowage Lake has a higher water quality grade (B, Good) than Moose Lake (C, Fair). Both are in Sawyer County, Wisconsin.

Reviewed by LakeQuality Editorial Team · Updated

Both Moose Lake and Tiger Cat 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: Moose Lake (C) and Tiger Cat Flowage Lake (B) are within one letter of each other on our A–F scale. 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

Moose Lake

Sawyer County, Wisconsin

Very murky, less than 2 ft of visibility.

B

Tiger Cat Flowage Lake

Sawyer County, Wisconsin

Good clarity, visible to about 10.8 ft.

Side-by-Side Metrics

MetricMoose LakeTiger Cat Flowage Lake
Overall GradeC (Fair)B (Good) Better
Water Clarity2 ft10.8 ft Better
Phosphorus28.9 µg/L13.4 µg/L Better
Chlorophyll-a (Algae)No dataNo data
Maximum Depth21 ft30 ft Better
Surface Area1,559 acres819 acres
Public AccessYesYes
Fish Species5 Better4
Trophic Stateeutrophicmesotrophic

A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.

Verdict

Tiger Cat Flowage Lake wins on overall water quality with a Grade B versus Moose Lake's Grade C. Water clarity: 10.8 ft vs 2 ft. For more fish-species variety, Moose Lake edges ahead with 5 documented species.

Source: EPA National Aquatic Resource Surveys, 2026.