How Clean Is Oconomowoc Lake No. 1?
Oconomowoc Lake No. 1 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): 13.8 ft. Phosphorus: 16 µg/L. Trophic State Index: 42.
Cleanliness Snapshot
| Metric | Oconomowoc Lake No. 1 | Wisconsin avg |
|---|---|---|
| Overall Grade | A | B |
| Water Clarity (Secchi) | 13.8 ft | — |
| Phosphorus | 16 µg/L | <30 = clean |
| Trophic State Index | 42 | <50 = clean |
How does Oconomowoc Lake No. 1 compare?
Oconomowoc Lake No. 1's grade of A matches or beats the Wisconsin state average of B. It ranks #32 of 48 lakes in Waukesha County by water quality score. Multi-year monitoring data shows water quality is improving based on 7 years of records.