How Clean Is Geneva Lake?
Geneva Lake is among the cleanest lakes in Minnesota. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 14.1 ft. Phosphorus: 21.5 µg/L. Chlorophyll-a (algae): 4.9 µg/L. Trophic State Index: 45.
Cleanliness Snapshot
| Metric | Geneva Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 14.1 ft | — |
| Phosphorus | 21.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 4.9 µg/L | <10 = clean |
| Trophic State Index | 45 | <50 = clean |
How does Geneva Lake compare?
Geneva Lake's readings match or beat the Minnesota state average. It ranks #13 of 37 lakes in Douglas 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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