Blackwater Lake vs Long Lake
Water quality, depth, fish species, and recreation comparison.
Long Lake has a higher water quality grade (A, Excellent) than Blackwater Lake (A, Excellent). Both are in Cass County, Minnesota.
A
Blackwater Lake
Cass County, Minnesota
Good clarity, visible to about 14.1 ft.
A
Long Lake
Cass County, Minnesota
Crystal clear, you can see 21.8 ft down.
Side-by-Side Metrics
| Metric | Blackwater Lake | Long Lake |
|---|---|---|
| Overall Grade | A (Excellent) | A (Excellent) |
| Water Clarity | 14.1 ft | 21.8 ft |
| Phosphorus | 11 µg/L | 9 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 67 ft | 115 ft |
| Surface Area | 771.45 acres | 1.0K acres |
| Public Access | Yes | Yes |
| Fish Species | 16 | 14 |
| Trophic State | oligotrophic | oligotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Long Lake wins on overall water quality with a Grade A versus Blackwater Lake's Grade A. Water clarity: 21.8 ft vs 14.1 ft. For more fish-species variety, Blackwater Lake edges ahead with 16 documented species.