Middle Lake
Middle Lake in Walworth County, Wisconsin has a water quality grade of B (Good). Water clarity: 10 ft visibility. Phosphorus: 12.8 µg/L. Maximum depth: 40 ft. Surface area: 259 acres.
Wisconsin DNR lists Panfish as common on Middle Lake. DNR survey details →
- Clarity
- 10 ft
- Max depth
- 40 ft
- Area
- 259 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
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Middle Lake is a 259-acre mesotrophic lake in Walworth County, Wisconsin with a maximum depth of 40 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing. Compared to the 18 other monitored lakes in Walworth County, Middle Lake ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-12. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLow algae
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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Good clarity, visible to about 10 ft. Phosphorus level: 12.8 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10 ft | Not graded |
| Phosphorus | 12.8 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Middle Lake
Compare lakeside cabins, hotels, and vacation rentals near Middle Lake 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.
Top-rated places to stay near Middle Lake
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Wisconsin DNR lists Panfish as common on Middle Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Middle Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 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. Monitored by volunteers since 2006. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 40 ft |
| Surface Area | 259 acres |
| Public Access | Yes |
Recreation & Access
- Lauderdale Lakes - Westshore DrivePublic
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 Middle Lake
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 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.307 m/yr | 7 |
| Phosphorus | → Stable | +0.07 µg/L/yr | 7 |
County Ranking
Ranked #10 of 19 lakes in Walworth County
Nearby Lakes in Walworth County
Frequently asked questions about Middle Lake
Where is Middle Lake?
- Middle Lake is a lake in Walworth County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Middle Lake?
- Middle Lake in Walworth County, Wisconsin has a water quality grade of B (Good). Water clarity: 10 ft visibility. Phosphorus: 12.8 µg/L. Maximum depth: 40 ft. Surface area: 259 acres.
Is Middle Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Middle Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Middle Lake?
- Middle Lake has a maximum depth of 40 feet. The lake covers 259 acres.
What fish are in Middle Lake?
- Fish species found in Middle Lake include Panfish, Largemouth Bass, Northern Pike, Walleye. Middle Lake is located in Walworth County, Wisconsin.
What did the DNR fisheries survey find at Middle Lake?
- Wisconsin DNR lists Panfish as common on Middle Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Middle Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Middle Lake?
- Middle Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lauderdale Lakes - Westshore Drive. Public access is listed as yes.
Explore Middle Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Walworth County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Moderate nutrients, good water quality
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
State Parks Near Middle Lake
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
64 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX64 samples · 2020–2026
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
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