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LakeQuality

Oconomowoc Lake 2 vs Oconomowoc Lake Site

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

Oconomowoc Lake 2 and Oconomowoc Lake Site both received the same overall water quality grade of A (Excellent). Both are in Waukesha County, Wisconsin.

Oconomowoc Lake 2 and Oconomowoc Lake Site are both in Wisconsin — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. The grades are close: Oconomowoc Lake 2 (A) and Oconomowoc Lake Site (A) 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 2

Waukesha County, Wisconsin

Good clarity, visible to about 14.2 ft.

A

Oconomowoc Lake Site

Waukesha County, Wisconsin

Good clarity, visible to about 13 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 2Oconomowoc Lake Site
Overall GradeA (Excellent)A (Excellent)
Water Clarity14.2 ft13 ft
Phosphorus15.5 µg/L13.8 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth60 ft60 ft
Surface Area818 acres818 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Statemesotrophicmesotrophic

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

Verdict

Both lakes earn the same Grade A. The tiebreakers come down to clarity (Oconomowoc Lake 2: 14.2 ft, Oconomowoc Lake Site: 13 ft) and what you want from the lake. Oconomowoc Lake 2 matches its peer on species count.