How Clean Is Namakan Lake?
Namakan Lake has poor water quality, with elevated phosphorus and algae. It received a water quality grade of D (Poor) based on EPA monitoring data. Water clarity (Secchi depth): 4.1 ft. Trophic State Index: 57.
Cleanliness Snapshot
| Metric | Namakan Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 4.1 ft | — |
| Trophic State Index | 57 | <50 = clean |
How does Namakan Lake compare?
Namakan Lake's grade of D falls below the Minnesota state average of C. It ranks #154 of 187 lakes in St. Louis County by water quality score.