Eagle Lake vs North Turtle Lake
Water quality, depth, fish species, and recreation comparison.
Eagle Lake has a higher water quality grade (A, Excellent) than North Turtle Lake (C, Fair). Both are in Otter Tail County, Minnesota.
Both Eagle Lake and North Turtle 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. The grades are meaningfully apart: Eagle Lake grades a A while North Turtle Lake grades a C. That two-letter spread reflects real underlying differences — different watershed inputs, different depth profiles, or different monitoring rigor.
For a recreational visitor, the wider grade gap is decisive — Eagle 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?
Eagle Lake
Crystal clear, you can see 22.6 ft down.
North Turtle Lake
Murky, only visible to about 4 ft.
Side-by-Side Metrics
| Metric | Eagle Lake | North Turtle Lake |
|---|---|---|
| Overall Grade | A (Excellent) | C (Fair) |
| Water Clarity | 22.6 ft | 4 ft |
| Phosphorus | 5 µg/L | 54.5 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 46 ft | 19 ft |
| Surface Area | 907.4 acres | 1.8K acres |
| Public Access | Yes | Yes |
| Fish Species | 10 | 12 |
| Trophic State | oligotrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Eagle Lake wins on overall water quality with a Grade A versus North Turtle Lake's Grade C. Water clarity: 22.6 ft vs 4 ft. For more fish-species variety, North Turtle Lake edges ahead with 12 documented species.