How Clean Is Oak Lake?
Oak 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): 3.8 ft. Trophic State Index: 58.
Cleanliness Snapshot
| Metric | Oak Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 3.8 ft | — |
| Trophic State Index | 58 | <50 = clean |
How does Oak Lake compare?
Oak Lake's grade of D falls below the Minnesota state average of C. It ranks #15 of 19 lakes in Pine County by water quality score. Multi-year monitoring data shows water quality is declining based on 5 years of records.