How Clean Is Feldtmann Lake?
Feldtmann Lake is a clean lake by Michigan standards. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 7.5 ft. Phosphorus: 11.5 µg/L. Trophic State Index: 44.
Cleanliness Snapshot
| Metric | Feldtmann Lake | Michigan avg |
|---|---|---|
| Water Clarity (Secchi) | 7.5 ft | — |
| Phosphorus | 11.5 µg/L | <30 = clean |
| Trophic State Index | 44 | <50 = clean |
How does Feldtmann Lake compare?
Feldtmann Lake's readings match or beat the Michigan state average. It ranks #7 of 11 lakes in Keweenaw County on nutrient and algae readings. Multi-year monitoring data shows water quality is declining based on 9 years of records.
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