How Clean Is Upper Maple Lake?
Upper Maple Lake is among the cleanest lakes in Minnesota. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 17.2 ft. Phosphorus: 17 µg/L. Chlorophyll-a (algae): 3.6 µg/L. Trophic State Index: 41.
Cleanliness Snapshot
| Metric | Upper Maple Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 17.2 ft | — |
| Phosphorus | 17 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 3.6 µg/L | <10 = clean |
| Trophic State Index | 41 | <50 = clean |
How does Upper Maple Lake compare?
Upper Maple Lake's readings match or beat the Minnesota state average. It ranks #4 of 51 lakes in Wright County on nutrient and algae readings. Multi-year monitoring data shows water quality is declining based on 6 years of records.
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