Clearwater Lake vs Ossawinnamakee Lake
Water quality, depth, fish species, and recreation comparison.
Clearwater Lake and Ossawinnamakee Lake both received the same overall water quality grade of A (Excellent). Both are in Crow Wing County, Minnesota.
Clearwater Lake and Ossawinnamakee Lake are both in Minnesota — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. The grades are close: Clearwater Lake (A) and Ossawinnamakee Lake (A) 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.
Clearwater Lake
Good clarity, visible to about 13 ft.
Ossawinnamakee Lake
Crystal clear, you can see 20 ft down.
Side-by-Side Metrics
| Metric | Clearwater Lake | Ossawinnamakee Lake |
|---|---|---|
| Overall Grade | A (Excellent) | A (Excellent) |
| Water Clarity | 13 ft | 20 ft |
| Phosphorus | 12 µg/L | 9 µg/L |
| Chlorophyll-a (Algae) | 3.7 µg/L | 1.8 µg/L |
| Maximum Depth | 54 ft | 63 ft |
| Surface Area | 905 acres | 711 acres |
| Public Access | Yes | Yes |
| Fish Species | 16 | 18 |
| Trophic State | mesotrophic | oligotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Clearwater Lake: 13 ft, Ossawinnamakee Lake: 20 ft) and what you want from the lake. Clearwater Lake has fewer fish species than Ossawinnamakee Lake.
Source: EPA National Aquatic Resource Surveys, 2026.