How Clean Is Lake St Croix?
Lake St Croix is a clean lake by Minnesota standards. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 7.2 ft. Phosphorus: 32.5 µg/L. Trophic State Index: 51.
Cleanliness Snapshot
| Metric | Lake St Croix | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 7.2 ft | — |
| Phosphorus | 32.5 µg/L | <30 = clean |
| Trophic State Index | 51 | <50 = clean |
How does Lake St Croix compare?
Lake St Croix's readings match or beat the Minnesota state average. It ranks #1 of 1 lakes in Pierce County on nutrient and algae readings. Multi-year monitoring data shows water quality is stable based on 5 years of records.
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