Long Lake vs Minong Flowage Lake
Water quality, depth, fish species, and recreation comparison.
Long Lake reads lower on nutrients and algae than Minong Flowage Lake. Both are in Washburn County, Wisconsin.
Both Long Lake and Minong Flowage Lake sit in Wisconsin. A same-state comparison strips out the state-level water-quality regime as a variable: any differences in the readings here are about the lakes themselves, not the agencies sampling them. The readings are close: Long Lake and Minong Flowage Lake sit within a narrow band of each other on phosphorus, chlorophyll-a and clarity. The per-parameter table below shows where the small differences actually live.
With readings 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.
Long Lake
Moderate clarity, visible to about 9.5 ft.
Minong Flowage Lake
Murky, only visible to about 3.5 ft.
Side-by-Side Metrics
| Metric | Long Lake | Minong Flowage Lake |
|---|---|---|
| Water Clarity | 9.5 ft Better | 3.5 ft |
| Phosphorus | 17.3 µg/L Better | 37.2 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | - | 21 ft |
| Surface Area | 3,290 acres | 1,587 acres |
| Public Access | Yes | Yes |
| Fish Species | 0 | 5 Better |
| Trophic State | mesotrophic | eutrophic |
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.
Swap a lake
Compare Long Lake or Minong Flowage Lake against a different lake.
Verdict
Long Lake reads lower on nutrients and algae than Minong Flowage Lake. Water clarity: 9.5 ft vs 3.5 ft. For more fish-species variety, Minong Flowage Lake edges ahead with 5 documented species.
Source: EPA National Aquatic Resource Surveys, 2026.