How Clean Is Tulaby Lake?
Tulaby Lake is a clean lake by Minnesota standards. It received a water quality grade of B (Good) based on EPA monitoring data. Water clarity (Secchi depth): 7.5 ft. Phosphorus: 23.5 µg/L. Trophic State Index: 49.
Cleanliness Snapshot
| Metric | Tulaby Lake | Minnesota avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 7.5 ft | — |
| Phosphorus | 23.5 µg/L | <30 = clean |
| Trophic State Index | 49 | <50 = clean |
How does Tulaby Lake compare?
Tulaby Lake's grade of B matches or beats the Minnesota state average of C. It ranks #7 of 16 lakes in Mahnomen County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.