How Clean Is Spirit River Flowage Lake?
Spirit River Flowage 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: 49.1 µg/L. Trophic State Index: 61.
Cleanliness Snapshot
| Metric | Spirit River Flowage Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 3 ft | — |
| Phosphorus | 49.1 µg/L | <30 = clean |
| Trophic State Index | 61 | <50 = clean |
How does Spirit River Flowage Lake compare?
Spirit River Flowage Lake's grade of D falls below the Wisconsin state average of C. It ranks #18 of 18 lakes in Lincoln County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.