Is Birch Lake Safe for Swimming?
Birch Lake in Cook County, Minnesota has a water quality grade of A (Excellent). Excellent for swimming — crystal clear water with minimal algae. Water clarity: 18 ft visibility. Phosphorus: 8 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 18 ft |
| Phosphorus | 8 μg/L |
| Maximum Depth | 69 ft |
| Location | Cook County, Minnesota |