Belle Lake vs Preston Lake
Water quality, depth, fish species, and recreation comparison.
Belle Lake has a higher water quality grade (C, Fair) than Preston Lake (F, Very Poor). Both are in Minnesota.
Both Belle Lake and Preston Lake sit in Minnesota. 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 meaningfully apart: Belle Lake grades a C while Preston Lake grades a F. That two-letter spread reflects real underlying differences — different watershed inputs, different depth profiles, or different monitoring rigor.
For a recreational visitor, the wider grade gap is decisive — Belle Lake is the better water-quality choice. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?
Belle Lake
Murky, only visible to about 3.9 ft.
Preston Lake
Murky, only visible to about 5 ft.
Side-by-Side Metrics
| Metric | Belle Lake | Preston Lake |
|---|---|---|
| Overall Grade | C (Fair) | F (Very Poor) |
| Water Clarity | 3.9 ft | 5 ft |
| Phosphorus | 42 µg/L | 222 µg/L |
| Chlorophyll-a (Algae) | No data | 44.1 µg/L |
| Maximum Depth | 25 ft | 11 ft |
| Surface Area | 863.92 acres | 654.96 acres |
| Public Access | Yes | Yes |
| Fish Species | 1 | 1 |
| Trophic State | eutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Belle Lake wins on overall water quality with a Grade C versus Preston Lake's Grade F. Water clarity: 3.9 ft vs 5 ft. For fishing diversity, Belle Lake also leads with 1 species.