Bass Lake vs South Twin Lake
Water quality, depth, fish species, and recreation comparison.
Bass Lake and South Twin Lake read the same on nutrients and algae. Both are in Mahnomen County, Minnesota.
Both Bass Lake and South Twin Lake sit in Minnesota. 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: Bass Lake and South Twin 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.
Bass Lake
Good clarity, visible to about 13.1 ft.
South Twin Lake
Good clarity, visible to about 10.2 ft.
Side-by-Side Metrics
| Metric | Bass Lake | South Twin Lake |
|---|---|---|
| Water Clarity | 13.1 ft Better | 10.2 ft |
| Phosphorus | 10 µg/L Better | 13.5 µg/L |
| Chlorophyll-a (Algae) | 4.9 µg/L | 3.1 µg/L Better |
| Maximum Depth | 26 ft | 29 ft Better |
| Surface Area | 735 acres | 1,127 acres |
| Public Access | Yes | Yes |
| Fish Species | 13 | 15 Better |
| Trophic State | mesotrophic | mesotrophic |
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 Bass Lake or South Twin Lake against a different lake.
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Bass Lake: 13.1 ft, South Twin Lake: 10.2 ft) and what you want from the lake. Bass Lake has fewer fish species than South Twin Lake.
Source: EPA National Aquatic Resource Surveys, 2026.