Outlet To Lake Geneva
Outlet To Lake Geneva in Walworth County, Wisconsin has a water quality grade of D (Nutrient-rich). Phosphorus: 658 µg/L. Maximum depth: 135 ft. Surface area: 5401 acres.
Wisconsin DNR rates Smallmouth Bass as abundant on Outlet To Lake Geneva. DNR survey details →
- Max depth
- 135 ft
- Area
- 5,401 acres
- Type
- Hypereutrophic
- Trend
- ↑ Improving
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Outlet To Lake Geneva →
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Outlet To Lake Geneva is a 5,401-acre highly nutrient-loaded hypereutrophic lake in Walworth County, Wisconsin with a maximum depth of 135 feet. Water quality is graded D based on 1 sampling years through 2020. Overall water quality is improving over recent sampling years. The lake supports 6 documented fish species including Panfish, Largemouth Bass, and Smallmouth Bass. Public access is available with 1 public boat landing and 6 public beaches. Compared to the 18 other monitored lakes in Walworth County, Outlet To Lake Geneva ranks #19 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2020-10-27. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyBacteria B
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Based on E. coli testing, Outlet To Lake Geneva rarely exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 2.8% of 500 samples across 9 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Wisconsin’s current beach and health-department advisories before swimming.
Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus level: 658 µg/L. Trophic State Index: 98.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 658 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 98 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Outlet To Lake Geneva
Compare lakeside cabins, hotels, and vacation rentals near Outlet To Lake Geneva in Walworth County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Outlet To Lake Geneva are listed below.
Top-rated places to stay near Outlet To Lake Geneva
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Planning a trip? Cabins and lodging at Outlet To Lake Geneva → · more Wisconsin lake trips
Wisconsin DNR rates Smallmouth Bass as abundant on Outlet To Lake Geneva.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Outlet To Lake Geneva D from EPA Water Quality Portal chemistry, and the water-quality trend over 2 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 15 stations on file (most recent sample 2026).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 135 ft |
| Surface Area | 5,401 acres |
| Public Access | Yes |
Recreation & Access
- Lake Geneva - Hillside RoadPublic
- Lake GenevaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Outlet To Lake Geneva
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -89.82 µg/L/yr | 2 |
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Outlet To Lake Geneva under Clean Water Act (NPDES) discharge permits. 2 facilities have a reported Clean Water Act violation in the past three years.
- Lake Geneva Wastewater Treatment PltLake Geneva, City Of · 2.6 mi away · NPDES WI0021130Recent violation
- Merry Water Farms IncLinn, Town Of · 4.6 mi away · NPDES WI0061883Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
County Ranking
Ranked #19 of 19 lakes in Walworth County
Nearby Lakes With Higher Grades
Outlet To Lake Geneva holds Grade D. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Walworth County
Frequently asked questions about Outlet To Lake Geneva
Where is Outlet To Lake Geneva?
- Outlet To Lake Geneva is a lake in Walworth County, Wisconsin. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Outlet To Lake Geneva?
- Outlet To Lake Geneva in Walworth County, Wisconsin has a water quality grade of D (Nutrient-rich). Phosphorus: 658 µg/L. Maximum depth: 135 ft. Surface area: 5401 acres.
Is Outlet To Lake Geneva safe to swim in?
- Based on E. coli testing, Outlet To Lake Geneva rarely exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 2.8% of 500 samples across 9 seasons. That works out to a bacteria swim-safety grade of B — a historical summary of past testing, not a current reading. Outlet To Lake Geneva has a water quality grade of D (Nutrient-rich). Bacteria levels can spike quickly after heavy rain, so always check Wisconsin's current beach and health-department advisories before you swim.
How deep is Outlet To Lake Geneva?
- Outlet To Lake Geneva has a maximum depth of 135 feet. The lake covers 5401 acres.
What fish are in Outlet To Lake Geneva?
- Fish species found in Outlet To Lake Geneva include Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Trout, Walleye. Outlet To Lake Geneva is located in Walworth County, Wisconsin.
What did the DNR fisheries survey find at Outlet To Lake Geneva?
- Wisconsin DNR rates Smallmouth Bass as abundant on Outlet To Lake Geneva. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Outlet To Lake Geneva D from EPA Water Quality Portal chemistry, and the water-quality trend over 2 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Outlet To Lake Geneva?
- Outlet To Lake Geneva has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Geneva - Hillside Road, Lake Geneva. Public access is listed as yes.
Explore Outlet To Lake Geneva across LakeQuality
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Species activity outlook by water temperature and season
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Very high nutrients, dense algae, poor clarity
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Where this data comes from
4 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX4 samples · 2020
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory