How Clean Is Trowbridge Lake?
Trowbridge Lake is among the cleanest lakes in Minnesota. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 13.5 ft. Phosphorus: 16 µg/L. Chlorophyll-a (algae): 3.5 µg/L. Trophic State Index: 42.
Cleanliness Snapshot
| Metric | Trowbridge Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 13.5 ft | — |
| Phosphorus | 16 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 3.5 µg/L | <10 = clean |
| Trophic State Index | 42 | <50 = clean |
How does Trowbridge Lake compare?
Trowbridge Lake's readings match or beat the Minnesota state average. It ranks #25 of 66 lakes in Otter Tail County on nutrient and algae readings. Multi-year monitoring data shows water quality is improving based on 6 years of records.
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