How Clean Is Third River Flowage Lake?
Third River Flowage Lake has fair water quality — typical of lakes with moderate nutrient enrichment. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 6.9 ft. Phosphorus: 28.5 µg/L. Chlorophyll-a (algae): 5.5 µg/L. Trophic State Index: 50.
Cleanliness Snapshot
| Metric | Third River Flowage Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 6.9 ft | — |
| Phosphorus | 28.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 5.5 µg/L | <10 = clean |
| Trophic State Index | 50 | <50 = clean |
How does Third River Flowage Lake compare?
Third River Flowage Lake's readings match or beat the Minnesota state average. It ranks #61 of 72 lakes in Itasca County on nutrient and algae readings. Multi-year monitoring data shows water quality is declining based on 2 years of records.
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