Is Rainy Lake Safe for Swimming?
Rainy Lake in St. Louis County, Minnesota has a water quality grade of D (Poor). Swimming not recommended, poor water quality with high algae risk. Water clarity: 5.9 ft visibility. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | D (Poor) |
| Water Clarity (Secchi Depth) | 5.9 ft |
| Maximum Depth | 161 ft |
| Location | St. Louis County, Minnesota |
How does Rainy Lake compare?
With an overall water quality grade of D, Rainy Lake falls below the Minnesota state average of Grade C. It ranks #146 of 187 lakes in St. Louis County by water quality score.
Water clarity (Secchi depth) sits at 5.9 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment.