Clearwater Lake vs Isabella Lake
Water quality, depth, fish species, and recreation comparison.
Clearwater Lake has a higher water quality grade (A, Excellent) than Isabella Lake (D, Poor). Both are in Lake County, Minnesota.
Both Clearwater Lake and Isabella 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. Clearwater Lake (A) is materially cleaner than Isabella Lake (D). A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.
For a recreational visitor, the wider grade gap is decisive — Clearwater 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?
Clearwater Lake
Crystal clear, you can see 18 ft down.
Isabella Lake
Murky, only visible to about 5.8 ft.
Side-by-Side Metrics
| Metric | Clearwater Lake | Isabella Lake |
|---|---|---|
| Overall Grade | A (Excellent) | D (Poor) |
| Water Clarity | 18 ft | 5.8 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 46 ft | 19 ft |
| Surface Area | 640.18 acres | 1.3K acres |
| Public Access | No | Yes |
| Fish Species | 0 | 1 |
| Trophic State | oligotrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Clearwater Lake wins on overall water quality with a Grade A versus Isabella Lake's Grade D. Water clarity: 18 ft vs 5.8 ft. For more fish-species variety, Isabella Lake edges ahead with 1 documented species.