Stony Lake vs Webb Lake
Water quality, depth, fish species, and recreation comparison.
Stony Lake and Webb Lake read the same on nutrients and algae. Both are in Cass County, Minnesota.
Both Stony Lake and Webb 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. These two sit close on the readings, Stony Lake versus Webb Lake. The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
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.
Stony Lake
Crystal clear, you can see 23 ft down.
Webb Lake
Crystal clear, you can see 18 ft down.
Side-by-Side Metrics
| Metric | Stony Lake | Webb Lake |
|---|---|---|
| Water Clarity | 23 ft Better | 18 ft |
| Phosphorus | 7 µg/L Better | 9.5 µg/L |
| Chlorophyll-a (Algae) | 2 µg/L Better | 2.9 µg/L |
| Maximum Depth | 50 ft | 84 ft Better |
| Surface Area | 563 acres | 720 acres |
| Public Access | Yes | Yes |
| Fish Species | 12 | 12 |
| Trophic State | oligotrophic | oligotrophic |
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 Stony Lake or Webb Lake against a different lake.
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Stony Lake: 23 ft, Webb Lake: 18 ft) and what you want from the lake. Stony Lake matches its peer on species count.
Source: EPA National Aquatic Resource Surveys, 2026.