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LakeQuality

Lake of Egypt vs One Horse Gap Lake

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

One Horse Gap Lake has a higher water quality grade (B, Good) than Lake of Egypt (C, Fair). Both are in Wisconsin.

Both Lake of Egypt and One Horse Gap Lake sit in Illinois. 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 — Lake of Egypt (C) versus One Horse Gap Lake (B). 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

Lake of Egypt

Williamson County, Wisconsin

Very murky, less than 3.2 ft of visibility.

B

One Horse Gap Lake

Pope County, Wisconsin

Murky, only visible to about 4 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.

MetricLake of EgyptOne Horse Gap Lake
Overall GradeC (Fair)B (Good)
Water Clarity3.2 ft4 ft
Phosphorus26 µg/L17 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth--
Surface Area2.3K acres29 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophiceutrophic

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

Verdict

One Horse Gap Lake wins on overall water quality with a Grade B versus Lake of Egypt's Grade C. Water clarity: 4 ft vs 3.2 ft. For fishing diversity, One Horse Gap Lake also leads with 0 species.