How Clean Is Geneva Lake?
Geneva Lake is among the cleanest lakes in Wisconsin. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 20.2 ft. Phosphorus: 13 µg/L. Trophic State Index: 37.
Cleanliness Snapshot
| Metric | Geneva Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 20.2 ft | — |
| Phosphorus | 13 µg/L | <30 = clean |
| Trophic State Index | 37 | <50 = clean |
How does Geneva Lake compare?
Geneva Lake's grade of A matches or beats the Wisconsin state average of C. It ranks #1 of 34 lakes in Walworth County by water quality score. Multi-year monitoring data shows water quality is stable based on 6 years of records.