Namakan Lake vs Rainy Lake
Water quality, depth, fish species, and recreation comparison.
Namakan Lake and Rainy Lake both received the same overall water quality grade of C (Fair). Both are in St. Louis County, Minnesota.
Namakan Lake and Rainy 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. These two are within a letter of each other on the rubric — Namakan Lake (C) versus Rainy Lake (C). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
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.
Namakan Lake
Moderate clarity, visible to about 9.8 ft.
Rainy Lake
Moderate clarity, visible to about 9.5 ft.
Side-by-Side Metrics
| Metric | Namakan Lake | Rainy Lake |
|---|---|---|
| Overall Grade | C (Fair) | C (Fair) |
| Water Clarity | 9.8 ft | 9.5 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 150 ft | 161 ft |
| Surface Area | 24.1K acres | 210.2K acres |
| Public Access | No | Yes |
| Fish Species | 1 | 1 |
| Trophic State | mesotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade C. The tiebreakers come down to clarity (Namakan Lake: 9.8 ft, Rainy Lake: 9.5 ft) and what you want from the lake. Namakan Lake matches its peer on species count.