Is German Lake Safe for Swimming?
German Lake in Le Sueur County, Minnesota has a water quality grade of F (Very Poor). Avoid swimming, very poor water quality, potential algae toxins. Water clarity: 3.5 ft visibility. Phosphorus: 74 µg/L. Chlorophyll-a (algae): 61.9 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Very Poor) |
| Water Clarity (Secchi Depth) | 3.5 ft |
| Phosphorus | 74 μg/L |
| Chlorophyll-a (Algae) | 61.9 μg/L |
| Maximum Depth | 51 ft |
| Location | Le Sueur County, Minnesota |
How does German Lake compare?
With an overall water quality grade of F, German Lake falls below the Minnesota state average of Grade C. It ranks #11 of 13 lakes in Le Sueur County by water quality score.
Water clarity (Secchi depth) sits at 3.5 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 61.9 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.