How Clean Is Irene Lake?
Irene 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): 9.8 ft. Phosphorus: 24 µg/L. Chlorophyll-a (algae): 7.4 µg/L. Trophic State Index: 48.
Cleanliness Snapshot
| Metric | Irene Lake | Minnesota avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 9.8 ft | — |
| Phosphorus | 24 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 7.4 µg/L | <10 = clean |
| Trophic State Index | 48 | <50 = clean |
How does Irene Lake compare?
Irene Lake's grade of B matches or beats the Minnesota state average of C. It ranks #26 of 37 lakes in Douglas County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.