Is Lake St Croix Safe for Swimming?
Lake St Croix in St. Croix County, Wisconsin has nutrient and algae measurements on record from state and federal monitoring. A water-quality reading is not a swimming clearance. The state water agency and county health departments post current advisories; check them before you swim.. Water clarity: 5.6 ft visibility. Phosphorus: 30 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Water Clarity (Secchi Depth) | 5.6 ft |
| Phosphorus | 30 μg/L |
| Maximum Depth | 60 ft |
| Location | St. Croix County, Wisconsin |
How does Lake St Croix compare?
With an overall water-quality readings of —, Lake St Croix matches or beats the Wisconsin state average. It ranks #1 of 5 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.
Watch Lake St Croix water quality
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