How Clean Is Stephens Lake?
Stephens 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): 2.6 ft. Phosphorus: 39.7 µg/L. Chlorophyll-a (algae): 19.9 µg/L. Trophic State Index: 60.
Cleanliness Snapshot
| Metric | Stephens Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 2.6 ft | — |
| Phosphorus | 39.7 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 19.9 µg/L | <10 = clean |
| Trophic State Index | 60 | <50 = clean |
How does Stephens Lake compare?
Stephens Lake's grade of D falls below the Wisconsin state average of C. It ranks #7 of 12 lakes in Boone County by water quality score.