Calhoun Lake vs Koronis Lake
Water quality, depth, fish species, and recreation comparison.
Calhoun Lake has a higher water quality grade (B, Good) than Koronis Lake (C, Fair). Both are in Minnesota.
Both Calhoun Lake and Koronis 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 close: Calhoun Lake (B) and Koronis Lake (C) are within one letter of each other on the LakeGrade rubric. 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.
Calhoun Lake
Moderate clarity, visible to about 7.3 ft.
Koronis Lake
Murky, only visible to about 6 ft.
Side-by-Side Metrics
| Metric | Calhoun Lake | Koronis Lake |
|---|---|---|
| Overall Grade | B (Good) | C (Fair) |
| Water Clarity | 7.3 ft | 6 ft |
| Phosphorus | 23.5 µg/L | 26 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | - | - |
| Surface Area | 617 acres | 3.0K acres |
| Public Access | Unknown | Unknown |
| Fish Species | 1 | 1 |
| Trophic State | mesotrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Calhoun Lake wins on overall water quality with a Grade B versus Koronis Lake's Grade C. Water clarity: 7.3 ft vs 6 ft. For fishing diversity, Calhoun Lake also leads with 1 species.