Jefferson Lake vs Scotch Lake
Water quality, depth, fish species, and recreation comparison.
Scotch Lake has a higher water quality grade (D, Poor) than Jefferson Lake (F, Very Poor). Both are in Le Sueur County, Minnesota.
Both Jefferson 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. The grades are close: Jefferson Lake (F) and Scotch Lake (D) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.
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.
Jefferson Lake
Very murky, less than 2 ft of visibility.
Scotch Lake
Murky, only visible to about 4.1 ft.
Side-by-Side Metrics
| Metric | Jefferson Lake | Scotch Lake |
|---|---|---|
| Overall Grade | F (Very Poor) | D (Poor) |
| Water Clarity | 2 ft | 4.1 ft |
| Phosphorus | 90 µg/L | 569 µg/L |
| Chlorophyll-a (Algae) | No data | 9.7 µg/L |
| Maximum Depth | - | 11 ft |
| Surface Area | 700 acres | 598.21 acres |
| Public Access | Yes | Yes |
| Fish Species | 0 | 1 |
| Trophic State | eutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Scotch Lake wins on overall water quality with a Grade D versus Jefferson Lake's Grade F. Water clarity: 4.1 ft vs 2 ft. For fishing diversity, Scotch Lake also leads with 1 species.