Pleasant Lake
Walworth County, Wisconsin145 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Pleasant Lake. Here is what has been measured.
- Mesotrophic
- 2 aquatic invasives
- 29 ft max depth
- Public access
Pleasant Lake in Walworth County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 12 ft visibility. Phosphorus: 15.1 µg/L. Maximum depth: 29 ft. Surface area: 145 acres.
Wisconsin DNR rates Largemouth Bass as abundant on Pleasant Lake. DNR survey details →
Pleasant Lake is a 145-acre mesotrophic lake in Walworth County, Wisconsin with a maximum depth of 29 feet. Overall water quality is declining 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, Pleasant Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-07-10. Methodology: how these readings are compared.
What Pleasant Lake is good for
From access and monitoring records, not editorial picks.
- Clear water12 ft of visibility
- Boat launch1 documented ramp
- Fishing4 species recorded
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 Pleasant 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 Pleasant Lake
These are the measurements Wisconsin DNR publishes for Pleasant 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 12 ft. Phosphorus 15.1 µg/L. TSI 42.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 12ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 15.1µg/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 Pleasant Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Pleasant Lake typically sits around 78°F at the surface in August. Summer average is about 76°F. Usually warmest in Jul (about 81°F) and coldest in Jun (about 70°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (70°F) to its warmest (81°F).
Typical surface water temperature by month, from 23 field readings (2024–2025) via the EPA Water Quality Portal. See the full Pleasant Lake water temperature breakdown →
Wisconsin DNR rates Largemouth Bass as abundant on Pleasant Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Pleasant Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is declining. 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 1986. 6 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
29 ft
Surface area
145 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.2 mi
HydroLAKES / HydroSHEDS
Elevation
883 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Pleasant LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Pleasant Lake
Compare lakeside cabins, hotels, and vacation rentals near Pleasant 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 Pleasant Lake
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Follow Pleasant Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Pleasant 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: Worsening
Based on 7 years of monitoring (2020–2026).
Water clarity
Worsening7 years
Phosphorus
Stable-0.06 µg/L/yr7 years
Nearby Lakes in Walworth County
Frequently asked questions about Pleasant Lake
Where is Pleasant Lake?
- Pleasant 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 Pleasant Lake?
- Pleasant Lake in Walworth County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 12 ft visibility. Phosphorus: 15.1 µg/L. Maximum depth: 29 ft. Surface area: 145 acres.
Is Pleasant Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Pleasant Lake?
- Pleasant Lake typically sits around 78°F at the surface in August, from 23 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Pleasant Lake?
- Pleasant Lake has a maximum depth of 29 feet. The lake covers 145 acres.
What fish are in Pleasant Lake?
- Fish species found in Pleasant Lake include Panfish, Largemouth Bass, Northern Pike, Walleye. Pleasant Lake is located in Walworth County, Wisconsin.
What did the DNR fisheries survey find at Pleasant Lake?
- Wisconsin DNR rates Largemouth Bass as abundant on Pleasant Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Pleasant Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Pleasant Lake?
- Pleasant Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pleasant Lake. Public access is listed as yes.
Can I fish at Pleasant Lake?
- Pleasant 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 Pleasant Lake across LakeQuality
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Where this data comes from
34 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_WQX34 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
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