How Clean Is Margrethe Lake?
Margrethe Lake is among the cleanest lakes in Michigan. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 16 ft. Phosphorus: 8 µg/L. Chlorophyll-a (algae): 1 µg/L. Trophic State Index: 34.
Cleanliness Snapshot
| Metric | Margrethe Lake | Michigan avg |
|---|---|---|
| Water Clarity (Secchi) | 16 ft | — |
| Phosphorus | 8 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 1 µg/L | <10 = clean |
| Trophic State Index | 34 | <50 = clean |
How does Margrethe Lake compare?
Margrethe Lake's readings match or beat the Michigan state average. It ranks #1 of 3 lakes in Crawford County on nutrient and algae readings. Multi-year monitoring data shows water quality is stable based on 7 years of records.
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