Pleasant Lake
Pleasant Lake in Walworth County, Wisconsin has a water quality grade of B (Good). 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 →
- Clarity
- 12 ft
- Typical in August
- 78°F
- Max depth
- 29 ft
- Area
- 145 acres
- Type
- Mesotrophic
- Trend
- ↓ Declining
- Public access
- Yes
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Pleasant Lake is a 145-acre mesotrophic lake in Walworth County, Wisconsin with a maximum depth of 29 feet. Water quality is graded B based on 1 sampling years through 2026. 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. 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 12 ft. Phosphorus level: 15.1 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12 ft | Not graded |
| Phosphorus | 15.1 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay 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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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
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.
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 a water-quality grade. LakeQuality grades Pleasant Lake B from EPA Water Quality Portal chemistry, 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
| Characteristic | Value |
|---|---|
| Maximum Depth | 29 ft |
| Surface Area | 145 acres |
| Public Access | Yes |
Lake Size & Watershed
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
Fish Species
Click a species to see every graded 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: ↓ Declining
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -1.027 m/yr | 7 |
| Phosphorus | → Stable | -0.06 µg/L/yr | 7 |
County Ranking
Ranked #6 of 19 lakes in Walworth County
Nearby Lakes in Walworth County
Frequently asked questions about Pleasant Lake
Where is Pleasant Lake?
- Pleasant 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 Pleasant Lake?
- Pleasant Lake in Walworth County, Wisconsin has a water quality grade of B (Good). 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?
- Good for swimming, clear water with low algae levels. Pleasant Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
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 a water-quality grade. LakeQuality grades Pleasant Lake B from EPA Water Quality Portal chemistry, 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.
Explore Pleasant Lake across LakeQuality
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Fish species and best lakes in Walworth County
Species activity outlook by water temperature and season
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Moderate nutrients, good water quality
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Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
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)
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