How Clean Is Round Lake?
Round 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): 14.5 ft. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Trophic State Index: 39.
Cleanliness Snapshot
| Metric | Round Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 14.5 ft | — |
| Phosphorus | 10 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 2.7 µg/L | <10 = clean |
| Trophic State Index | 39 | <50 = clean |
How does Round Lake compare?
Round Lake's grade of A matches or beats the Minnesota state average of C. It ranks #1 of 18 lakes in Aitkin County by water quality score. Multi-year monitoring data shows water quality is stable based on 6 years of records.