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LakeQuality

Little Muskego Lake vs Muskego Lake

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

Little Muskego Lake has a higher water quality grade (A, Excellent) than Muskego Lake (C, Fair). Both are in Waukesha County, Wisconsin.

Little Muskego Lake and Muskego Lake 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. Little Muskego Lake (A) is materially cleaner than Muskego Lake (C). A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.

For a recreational visitor, the wider grade gap is decisive — Little Muskego Lake is the better water-quality choice. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?

A

Little Muskego Lake

Waukesha County, Wisconsin

Crystal clear, you can see 15.5 ft down.

C

Muskego Lake

Waukesha County, Wisconsin

No clarity data.

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.

MetricLittle Muskego LakeMuskego Lake
Overall GradeA (Excellent)C (Fair)
Water Clarity15.5 ftNo data
PhosphorusNo data59.4 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth65 ft23 ft
Surface Area470 acres2.2K acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateoligotrophiceutrophic

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

Verdict

Little Muskego Lake wins on overall water quality with a Grade A versus Muskego Lake's Grade C. For fishing diversity, Little Muskego Lake also leads with 0 species.