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LakeQuality

Oconomowoc Lake No. 1 vs Okauchee Lake-Site No. 2-at Okauchee

Water quality, depth, fish species, and recreation comparison.

Oconomowoc Lake No. 1 has a higher water quality grade (A, Excellent) than Okauchee Lake-Site No. 2-at Okauchee (B, Good). Both are in Waukesha County, Wisconsin.

Both Oconomowoc Lake No. 1 and Okauchee Lake-Site No. 2-at Okauchee sit in Wisconsin. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. The grades are close: Oconomowoc Lake No. 1 (A) and Okauchee Lake-Site No. 2-at Okauchee (B) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.

With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.

A

Oconomowoc Lake No. 1

Waukesha County, Wisconsin

Good clarity, visible to about 13.8 ft.

B

Okauchee Lake-Site No. 2-at Okauchee

Waukesha County, Wisconsin

Murky, only visible to about 5.9 ft.

Side-by-Side Metrics

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

MetricOconomowoc Lake No. 1Okauchee Lake-Site No. 2-at Okauchee
Overall GradeA (Excellent)B (Good)
Water Clarity13.8 ft5.9 ft
Phosphorus16 µg/L18 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth60 ft90 ft
Surface Area818 acres1.2K acres
Public AccessUnknownUnknown
Fish Species00
Trophic Statemesotrophicmesotrophic

Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).

Verdict

Oconomowoc Lake No. 1 wins on overall water quality with a Grade A versus Okauchee Lake-Site No. 2-at Okauchee's Grade B. Water clarity: 13.8 ft vs 5.9 ft. For fishing diversity, Oconomowoc Lake No. 1 also leads with 0 species.