How Clean Is Upper Hay Lake?
Upper Hay Lake is among the cleanest lakes in Minnesota. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 10.9 ft. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 4.8 µg/L. Trophic State Index: 45.
Cleanliness Snapshot
| Metric | Upper Hay Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 10.9 ft | — |
| Phosphorus | 20 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 4.8 µg/L | <10 = clean |
| Trophic State Index | 45 | <50 = clean |
How does Upper Hay Lake compare?
Upper Hay Lake's readings match or beat the Minnesota state average. It ranks #47 of 85 lakes in Crow Wing County on nutrient and algae readings. Multi-year monitoring data shows water quality is improving based on 6 years of records.
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