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LakeQuality

Geneva Lake Site B vs Outlet To Lake Geneva

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

Geneva Lake Site B has a higher water quality grade (A, Excellent) than Outlet To Lake Geneva (F, Very Poor). Both are in Walworth County, Wisconsin.

Geneva Lake Site B and Outlet To Lake Geneva 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 meaningfully apart: Geneva Lake Site B grades a A while Outlet To Lake Geneva grades a F. That two-letter spread reflects real underlying differences — different watershed inputs, different depth profiles, or different monitoring rigor.

For a recreational visitor, the wider grade gap is decisive — Geneva Lake Site B 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

Geneva Lake Site B

Walworth County, Wisconsin

Crystal clear, you can see 24.1 ft down.

F

Outlet To Lake Geneva

Walworth 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.

MetricGeneva Lake Site BOutlet To Lake Geneva
Overall GradeA (Excellent)F (Very Poor)
Water Clarity24.1 ftNo data
Phosphorus12.9 µg/L734.5 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth135 ft135 ft
Surface Area5.4K acres5.4K acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateoligotrophichypereutrophic

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

Verdict

Geneva Lake Site B wins on overall water quality with a Grade A versus Outlet To Lake Geneva's Grade F. For fishing diversity, Geneva Lake Site B also leads with 0 species.