Lake Beulah vs Outlet To Lake Geneva
Water quality, depth, fish species, and recreation comparison.
Lake Beulah has a higher water quality grade (A, Excellent) than Outlet To Lake Geneva (D, Poor). Both are in Walworth County, Wisconsin.
Both Lake Beulah and Outlet To Lake Geneva 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. Lake Beulah (A) is materially cleaner than Outlet To Lake Geneva (D). 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 — Lake Beulah 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?
Lake Beulah
Good clarity, visible to about 10 ft.
Outlet To Lake Geneva
No clarity data.
Side-by-Side Metrics
| Metric | Lake Beulah | Outlet To Lake Geneva |
|---|---|---|
| Overall Grade | A (Excellent) | D (Poor) |
| Water Clarity | 10 ft | No data |
| Phosphorus | 13.4 µg/L | 658 µg/L |
| Chlorophyll-a (Algae) | 2.5 µg/L | No data |
| Maximum Depth | 58 ft | 135 ft |
| Surface Area | 812 acres | 5,401 acres |
| Public Access | Yes | Yes |
| Fish Species | 3 | 6 |
| Trophic State | mesotrophic | hypereutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Lake Beulah wins on overall water quality with a Grade A versus Outlet To Lake Geneva's Grade D. For more fish-species variety, Outlet To Lake Geneva edges ahead with 6 documented species.
Source: EPA National Aquatic Resource Surveys, 2026.