Is Lake Winnibigoshish Safe for Swimming?
Lake Winnibigoshish in Cass County, Minnesota has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 12.1 ft visibility. Chlorophyll-a (algae): 5.3 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 12.1 ft |
| Chlorophyll-a (Algae) | 5.3 μg/L |
| Maximum Depth | 69.8 ft |
| Location | Cass County, Minnesota |
How does Lake Winnibigoshish compare?
With an overall water quality grade of B, Lake Winnibigoshish matches or beats the Minnesota state average of Grade C. It ranks #110 of 132 lakes in Cass County by water quality score.
Water clarity (Secchi depth) sits at 12.1 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae. Algae levels (chlorophyll-a) measure 5.3 µg/L — low and well within safe swimming guidelines.