How Clean Is Oconomowoc Lake?
Oconomowoc Lake is a clean lake by Wisconsin standards. It received a water quality grade of B (Good) based on EPA monitoring data. Water clarity (Secchi depth): 12.5 ft. Phosphorus: 11.9 µg/L. Trophic State Index: 40.
Cleanliness Snapshot
| Metric | Oconomowoc Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | B |
| Water Clarity (Secchi) | 12.5 ft | — |
| Phosphorus | 11.9 µg/L | <30 = clean |
| Trophic State Index | 40 | <50 = clean |
How does Oconomowoc Lake compare?
Oconomowoc Lake's grade of B matches or beats the Wisconsin state average of B. It ranks #19 of 35 lakes in Waukesha County by water quality score. Multi-year monitoring data shows water quality is improving based on 7 years of records.
Watch Oconomowoc Lake water quality
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