Lake Beulah vs Outlet To Lake Geneva
Water quality, depth, fish species, and recreation comparison.
Lake Beulah reads lower on nutrients and algae than Outlet To Lake Geneva. 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 differences in the readings here are about the lakes themselves, not the agencies sampling them. Lake Beulah reads materially cleaner than Outlet To Lake Geneva on nutrients and algae. 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 gap in the readings is decisive: Lake Beulah has the lower nutrient and algae numbers. 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 |
|---|---|---|
| Water Clarity | 10 ft | No data |
| Phosphorus | 13.4 µg/L Better | 658 µg/L |
| Chlorophyll-a (Algae) | 2.5 µg/L | No data |
| Maximum Depth | 58 ft | 135 ft Better |
| Surface Area | 812 acres | 5,401 acres |
| Public Access | Yes | Yes |
| Fish Species | 3 | 6 Better |
| Trophic State | mesotrophic | hypereutrophic |
A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.
Swap a lake
Compare Lake Beulah or Outlet To Lake Geneva against a different lake.
Verdict
Lake Beulah reads lower on nutrients and algae than Outlet To Lake Geneva. For more fish-species variety, Outlet To Lake Geneva edges ahead with 6 documented species.
Source: EPA National Aquatic Resource Surveys, 2026.