How Clean Is Big Fish Lake?
Big Fish Lake is among the cleanest lakes in Minnesota. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 20 ft. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 1.8 µg/L. Trophic State Index: 35.
Cleanliness Snapshot
| Metric | Big Fish Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 20 ft | — |
| Phosphorus | 9 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 1.8 µg/L | <10 = clean |
| Trophic State Index | 35 | <50 = clean |
How does Big Fish Lake compare?
Big Fish Lake's readings match or beat the Minnesota state average. It ranks #4 of 32 lakes in Stearns County on nutrient and algae readings. Multi-year monitoring data shows water quality is declining based on 6 years of records.
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