How Clean Is Lake Koshkonong?
Lake Koshkonong is nutrient-rich, with elevated phosphorus and algae. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 1.7 ft. Phosphorus: 287 µg/L. Trophic State Index: 77.
Cleanliness Snapshot
| Metric | Lake Koshkonong | Wisconsin avg |
|---|---|---|
| Water Clarity (Secchi) | 1.7 ft | — |
| Phosphorus | 287 µg/L | <30 = clean |
| Trophic State Index | 77 | <50 = clean |
How does Lake Koshkonong compare?
Lake Koshkonong's readings run above the Wisconsin state average. It ranks #7 of 7 lakes in Jefferson County on nutrient and algae readings. Multi-year monitoring data shows water quality is improving based on 4 years of records.
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