How Clean Is Mule Lake?
Mule Lake is among the cleanest lakes in Minnesota. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 18 ft. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 2.4 µg/L. Trophic State Index: 37.
Cleanliness Snapshot
| Metric | Mule Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 18 ft | — |
| Phosphorus | 10 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 2.4 µg/L | <10 = clean |
| Trophic State Index | 37 | <50 = clean |
How does Mule Lake compare?
Mule Lake's readings match or beat the Minnesota state average. It ranks #57 of 104 lakes in Cass County by water quality score. Multi-year monitoring data shows water quality is declining based on 6 years of records.
Watch Mule Lake water quality
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