How Clean Is Marion Lake?
Marion Lake is algae-prone, with a higher bloom risk in warm months. Its nutrient and algae readings come from EPA monitoring data. Phosphorus: 71 µg/L. Chlorophyll-a (algae): 73 µg/L. Trophic State Index: 69.
Cleanliness Snapshot
| Metric | Marion Lake | Minnesota avg |
|---|---|---|
| Phosphorus | 71 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 73 µg/L | <10 = clean |
| Trophic State Index | 69 | <50 = clean |
How does Marion Lake compare?
Marion Lake's readings run above the Minnesota state average. It ranks #3 of 5 lakes in McLeod County on nutrient and algae readings.
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