Is Hanska Lake Safe for Swimming?
Hanska Lake in Brown County, Minnesota has a water quality grade of F (Very Poor). Avoid swimming, very poor water quality, potential algae toxins. Water clarity: 1 ft visibility. Phosphorus: 218 µg/L. Chlorophyll-a (algae): 99.6 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Very Poor) |
| Water Clarity (Secchi Depth) | 1 ft |
| Phosphorus | 218 μg/L |
| Chlorophyll-a (Algae) | 99.6 μg/L |
| Maximum Depth | 16 ft |
| Location | Brown County, Minnesota |
How does Hanska Lake compare?
With an overall water quality grade of F, Hanska Lake falls below the Minnesota state average of Grade C. It ranks #5 of 7 lakes in Brown County by water quality score.
Water clarity (Secchi depth) sits at 1 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff. Algae levels (chlorophyll-a) measure 99.6 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.