German Lake vs Jefferson Lake
Water quality, depth, fish species, and recreation comparison.
German Lake and Jefferson Lake read the same on nutrients and algae. Both are in Le Sueur County, Minnesota.
German Lake and Jefferson Lake are both in Minnesota — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. These two sit close on the readings, German Lake versus Jefferson Lake. The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
With readings 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.
German Lake
Murky, only visible to about 3.5 ft.
Jefferson Lake
Very murky, less than 2 ft of visibility.
Side-by-Side Metrics
| Metric | German Lake | Jefferson Lake |
|---|---|---|
| Water Clarity | 3.5 ft Better | 2 ft |
| Phosphorus | 74 µg/L Better | 86.5 µg/L |
| Chlorophyll-a (Algae) | 61.9 µg/L Better | 72 µg/L |
| Maximum Depth | 51 ft | - |
| Surface Area | 889 acres | 700 acres |
| Public Access | Yes | Yes |
| Fish Species | 19 Better | 0 |
| Trophic State | eutrophic | eutrophic |
A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.
Swap a lake
Compare German Lake or Jefferson Lake against a different lake.
Verdict
Both lakes earn the same Grade F. The tiebreakers come down to clarity (German Lake: 3.5 ft, Jefferson Lake: 2 ft) and what you want from the lake. German Lake supports more documented fish species.
Source: EPA National Aquatic Resource Surveys, 2026.