How Clean Is Lake St Croix?
Lake St Croix is a clean lake by Wisconsin standards. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 5.6 ft. Phosphorus: 30 µg/L. Trophic State Index: 53.
Cleanliness Snapshot
| Metric | Lake St Croix | Wisconsin avg |
|---|---|---|
| Water Clarity (Secchi) | 5.6 ft | — |
| Phosphorus | 30 µg/L | <30 = clean |
| Trophic State Index | 53 | <50 = clean |
How does Lake St Croix compare?
Lake St Croix's readings match or beat the Wisconsin state average. It ranks #1 of 5 lakes in St. Croix County by water quality score.
Watch Lake St Croix water quality
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