Frances Lake vs Scotch Lake
Water quality, depth, fish species, and recreation comparison.
Frances Lake and Scotch Lake both received the same overall water quality grade of D (Poor). Both are in Le Sueur County, Minnesota.
Both Frances Lake and Scotch 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 — Frances Lake (D) versus Scotch Lake (D). 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.
Frances Lake
Murky, only visible to about 6 ft.
Scotch Lake
Very murky, less than 2.6 ft of visibility.
Side-by-Side Metrics
| Metric | Frances Lake | Scotch Lake |
|---|---|---|
| Overall Grade | D (Poor) | D (Poor) |
| Water Clarity | 6 ft | 2.6 ft |
| Phosphorus | 23 µg/L | 569 µg/L |
| Chlorophyll-a (Algae) | 20.6 µg/L | 9.7 µg/L |
| Maximum Depth | 60 ft | 11 ft |
| Surface Area | 927 acres | 598 acres |
| Public Access | Yes | Yes |
| Fish Species | 16 | 5 |
| Trophic State | eutrophic | hypereutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade D. The tiebreakers come down to clarity (Frances Lake: 6 ft, Scotch Lake: 2.6 ft) and what you want from the lake. Frances Lake supports more documented fish species.
Source: EPA National Aquatic Resource Surveys, 2026.