How Clean Is Trowbridge Lake?
Trowbridge Lake is among the cleanest lakes in Minnesota. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 11 ft. Phosphorus: 16 µg/L. Trophic State Index: 43.
Cleanliness Snapshot
| Metric | Trowbridge Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 11 ft | — |
| Phosphorus | 16 µg/L | <30 = clean |
| Trophic State Index | 43 | <50 = clean |
How does Trowbridge Lake compare?
Trowbridge Lake's grade of A matches or beats the Minnesota state average of C. It ranks #36 of 97 lakes in Otter Tail County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.