Is Lake St Croix Safe for Swimming?
Lake St Croix in Pierce County, Minnesota has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 7.2 ft visibility. Phosphorus: 32.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 7.2 ft |
| Phosphorus | 32.5 μg/L |
| Maximum Depth | 78 ft |
| Location | Pierce County, Minnesota |
How does Lake St Croix compare?
With an overall water quality grade of B, Lake St Croix matches or beats the Minnesota state average of Grade C. It ranks #1 of 1 lakes in Pierce County by water quality score.
Water clarity (Secchi depth) sits at 7.2 feet. That puts the lake in good clarity range, with limited algae interference.