Is Long Island Lake Safe for Swimming?
Long Island Lake in Cook County, Minnesota has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 8 ft visibility. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 8 ft |
| Maximum Depth | 85 ft |
| Location | Cook County, Minnesota |
How does Long Island Lake compare?
With an overall water quality grade of C, Long Island Lake matches or beats the Minnesota state average of Grade C. It ranks #94 of 128 lakes in Cook County by water quality score.
Water clarity (Secchi depth) sits at 8 feet. That puts the lake in good clarity range, with limited algae interference.