How Clean Is Ml-Garrison Lake?
Ml-Garrison 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): 12.5 ft. Phosphorus: 26 µg/L. Chlorophyll-a (algae): 5.4 µg/L. Trophic State Index: 46.
Cleanliness Snapshot
| Metric | Ml-Garrison Lake | Minnesota avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 12.5 ft | — |
| Phosphorus | 26 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 5.4 µg/L | <10 = clean |
| Trophic State Index | 46 | <50 = clean |
How does Ml-Garrison Lake compare?
Ml-Garrison Lake's grade of B matches or beats the Minnesota state average of C. It ranks #26 of 53 lakes in Aitkin County by water quality score. Multi-year monitoring data shows water quality is stable based on 6 years of records.