How Clean Is Salem Lake?
Salem Lake has very poor water quality and a high algae bloom risk. It received a water quality grade of F (Very Poor) based on EPA monitoring data. Water clarity (Secchi depth): 1 ft. Phosphorus: 197 µg/L. Trophic State Index: 79.
Cleanliness Snapshot
| Metric | Salem Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | F | D |
| Water Clarity (Secchi) | 1 ft | — |
| Phosphorus | 197 µg/L | <30 = clean |
| Trophic State Index | 79 | <50 = clean |
How does Salem Lake compare?
Salem Lake's grade of F falls below the Wisconsin state average of D. It ranks #4 of 6 lakes in Marion County by water quality score.