How Clean Is Ottawa Lake?
Ottawa Lake is a clean lake by Michigan standards. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 19.3 ft. Phosphorus: 10 µg/L. Trophic State Index: 36.
Cleanliness Snapshot
| Metric | Ottawa Lake | Michigan avg |
|---|---|---|
| Water Clarity (Secchi) | 19.3 ft | — |
| Phosphorus | 10 µg/L | <30 = clean |
| Trophic State Index | 36 | <50 = clean |
How does Ottawa Lake compare?
Ottawa Lake's readings match or beat the Michigan state average. It ranks #14 of 21 lakes in Iron County on nutrient and algae readings. Multi-year monitoring data shows water quality is stable based on 6 years of records.
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