Franklin Lake vs Prairie Lake
Water quality, depth, fish species, and recreation comparison.
Franklin Lake has a higher water quality grade (A, Excellent) than Prairie Lake (B, Good). Both are in Otter Tail County, Minnesota.
Both Franklin Lake and Prairie 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. These two are within a letter of each other on the rubric — Franklin Lake (A) versus Prairie Lake (B). 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.
Franklin Lake
Good clarity, visible to about 13.1 ft.
Prairie Lake
Moderate clarity, visible to about 8.9 ft.
Side-by-Side Metrics
| Metric | Franklin Lake | Prairie Lake |
|---|---|---|
| Overall Grade | A (Excellent) | B (Good) |
| Water Clarity | 13.1 ft | 8.9 ft |
| Phosphorus | 17 µg/L | 18 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 48 ft | 22 ft |
| Surface Area | 1.1K acres | 1.0K acres |
| Public Access | Yes | 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
Franklin Lake wins on overall water quality with a Grade A versus Prairie Lake's Grade B. Water clarity: 13.1 ft vs 8.9 ft. For fishing diversity, Franklin Lake also leads with 1 species.