How Clean Is Upper Estuary Lake?
Upper Estuary Lake has fair water quality — typical of lakes with moderate nutrient enrichment. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 1.9 ft. Phosphorus: 49.5 µg/L. Chlorophyll-a (algae): 1.7 µg/L. Trophic State Index: 55.
Cleanliness Snapshot
| Metric | Upper Estuary Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 1.9 ft | — |
| Phosphorus | 49.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 1.7 µg/L | <10 = clean |
| Trophic State Index | 55 | <50 = clean |
How does Upper Estuary Lake compare?
Upper Estuary Lake's readings match or beat the Minnesota state average. It ranks #62 of 68 lakes in St. Louis County on nutrient and algae readings.
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