How Clean Is Shell Lake?
Shell 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): 7.3 ft. Phosphorus: 22 µg/L. Trophic State Index: 49.
Cleanliness Snapshot
| Metric | Shell Lake | Minnesota avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 7.3 ft | — |
| Phosphorus | 22 µg/L | <30 = clean |
| Trophic State Index | 49 | <50 = clean |
How does Shell Lake compare?
Shell Lake's grade of B matches or beats the Minnesota state average of C. It ranks #56 of 93 lakes in Becker County by water quality score. Multi-year monitoring data shows water quality is improving based on 2 years of records.