How Clean Is Long Lake?
Long 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 ft. Phosphorus: 88 µg/L. Trophic State Index: 65.
Cleanliness Snapshot
| Metric | Long Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 3 ft | — |
| Phosphorus | 88 µg/L | <30 = clean |
| Trophic State Index | 65 | <50 = clean |
How does Long Lake compare?
Long Lake's grade of D falls below the Minnesota state average of C. It ranks #19 of 35 lakes in Kandiyohi County by water quality score. Multi-year monitoring data shows water quality is stable based on 3 years of records.