How Clean Is Maple Lake?
Maple 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): 3.3 ft. Phosphorus: 38.5 µg/L. Trophic State Index: 58.
Cleanliness Snapshot
| Metric | Maple Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 3.3 ft | — |
| Phosphorus | 38.5 µg/L | <30 = clean |
| Trophic State Index | 58 | <50 = clean |
How does Maple Lake compare?
Maple Lake's grade of D falls below the Minnesota state average of C. It ranks #13 of 21 lakes in Polk County by water quality score. Multi-year monitoring data shows water quality is stable based on 6 years of records.