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LakeQuality

Delavan Lake vs Delavan Lake

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

Delavan Lake and Delavan Lake both received the same overall water quality grade of C (Fair). Both are in Walworth County, Wisconsin.

Both Delavan Lake and Delavan Lake 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. These two are within a letter of each other on the rubric — Delavan Lake (C) versus Delavan Lake (C). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.

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.

C

Delavan Lake

Walworth County, Wisconsin

Good clarity, visible to about 10 ft.

C

Delavan Lake

Walworth County, Wisconsin

Moderate clarity, visible to about 8 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.

MetricDelavan LakeDelavan Lake
Overall GradeC (Fair)C (Fair)
Water Clarity10 ft8 ft
Phosphorus73 µg/L49.5 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth--
Surface Area2.1K acres2.1K acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophiceutrophic

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

Verdict

Both lakes earn the same Grade C. The tiebreakers come down to clarity (Delavan Lake: 10 ft, Delavan Lake: 8 ft) and what you want from the lake. Delavan Lake matches its peer on species count.