Is Lake St. Croix Safe for Swimming?
Lake St. Croix in St. Croix County, Wisconsin has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 5.6 ft visibility. Phosphorus: 16.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 5.6 ft |
| Phosphorus | 16.5 μg/L |
| Maximum Depth | 60 ft |
| Location | St. Croix County, Wisconsin |
How does Lake St. Croix compare?
With an overall water quality grade of B, Lake St. Croix matches or beats the Wisconsin state average of Grade B. It ranks #3 of 7 lakes in St. Croix County by water quality score.
Water clarity (Secchi depth) sits at 5.6 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment.