How Clean Is Lake Kegonsa?
Lake Kegonsa has fair water quality — typical of lakes with moderate nutrient enrichment. It received a water quality grade of C (Fair) based on EPA monitoring data. Water clarity (Secchi depth): 3.7 ft. Phosphorus: 59.5 µg/L. Trophic State Index: 61.
Cleanliness Snapshot
| Metric | Lake Kegonsa | Wisconsin avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 3.7 ft | — |
| Phosphorus | 59.5 µg/L | <30 = clean |
| Trophic State Index | 61 | <50 = clean |
How does Lake Kegonsa compare?
Lake Kegonsa's grade of C matches or beats the Wisconsin state average of C. It ranks #3 of 21 lakes in Dane County by water quality score. Multi-year monitoring data shows water quality is stable based on 6 years of records.