Middle Lake
Walworth County, Wisconsin259 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Middle Lake. Here is what has been measured.
- Mesotrophic
- 2 aquatic invasives
- 40 ft max depth
- Public access
Middle Lake in Walworth County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. 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 →
Middle Lake is a 259-acre mesotrophic lake in Walworth County, Wisconsin with a maximum depth of 40 feet. 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. Methodology: how these readings are compared.
What Middle Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10 ft of visibility
- Boat launch1 documented ramp
- Fishing4 species recorded
- Deep water40 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Middle Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Middle Lake
These are the measurements Wisconsin DNR publishes for Middle Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 10 ft. Phosphorus 12.8 µg/L. TSI 42.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 10ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 12.8µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 42 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Middle Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as common on Middle Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Middle Lake’s water-quality measurements separately, 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
Max depth
40 ft
Surface area
259 acres
Public access
Yes
Listed by Wisconsin DNR
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
Stays via Stay22
Stays near Middle Lake
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Fish Species
Click a species to see every 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 (2020–2026).
Water clarity
Improving7 years
Phosphorus
Stable+0.07 µg/L/yr7 years
Nearby Lakes in Walworth County
Frequently asked questions about Middle Lake
Where is Middle Lake?
- Middle Lake is a lake in Walworth County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Middle Lake?
- Middle Lake in Walworth County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. 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?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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 water quality. LakeQuality shows Middle Lake’s water-quality measurements separately, 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.
Can I fish at Middle Lake?
- Middle Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Explore Middle Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
Fish species and the cleanest 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 readings
Wisconsin's cleanest lakes, ranked on agency measurements
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Other 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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory