How Clean Is Flat Lake?
Flat Lake is among the cleanest lakes in Minnesota. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 11.2 ft. Phosphorus: 13 µg/L. Chlorophyll-a (algae): 3.7 µg/L. Trophic State Index: 42.
Cleanliness Snapshot
| Metric | Flat Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 11.2 ft | — |
| Phosphorus | 13 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 3.7 µg/L | <10 = clean |
| Trophic State Index | 42 | <50 = clean |
How does Flat Lake compare?
Flat Lake's readings match or beat the Minnesota state average. It ranks #53 of 84 lakes in Becker County on nutrient and algae readings. Multi-year monitoring data shows water quality is improving based on 2 years of records.
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