How Clean Is Man Lake?
Man 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): 11.2 ft. Phosphorus: 9.5 µg/L. Trophic State Index: 39.
Cleanliness Snapshot
| Metric | Man Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 11.2 ft | — |
| Phosphorus | 9.5 µg/L | <30 = clean |
| Trophic State Index | 39 | <50 = clean |
How does Man Lake compare?
Man Lake's grade of A matches or beats the Minnesota state average of C. It ranks #69 of 133 lakes in Cass County by water quality score. Multi-year monitoring data shows water quality is stable based on 5 years of records.