How Clean Is Long Lake?
Long Lake is among the cleanest lakes in Michigan. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 14 ft. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 1 µg/L. Trophic State Index: 37.
Cleanliness Snapshot
| Metric | Long Lake | Michigan avg |
|---|---|---|
| Water Clarity (Secchi) | 14 ft | — |
| Phosphorus | 14 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 1 µg/L | <10 = clean |
| Trophic State Index | 37 | <50 = clean |
How does Long Lake compare?
Long Lake's readings match or beat the Michigan state average. It ranks #3 of 5 lakes in Iosco 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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