Lake Pesobic
Lincoln County, Wisconsin147 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Lake Pesobic. Here is what has been measured.
- Mesotrophic
- Impaired · Mercury
- 11 ft max depth
- Public access
Lake Pesobic in Lincoln County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7 ft visibility. Phosphorus: 22.2 µg/L. Maximum depth: 11 ft. Surface area: 147 acres.
Wisconsin DNR lists Panfish as common on Lake Pesobic. DNR survey details →
Lake Pesobic is a 147-acre mesotrophic lake in Lincoln County, Wisconsin with a maximum depth of 11 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 12 other monitored lakes in Lincoln County, Lake Pesobic ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-27. Methodology: how these readings are compared.
What Lake Pesobic is good for
From access and monitoring records, not editorial picks.
- 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. Lake Pesobic is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Lake Pesobic 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 Lake Pesobic
These are the measurements Wisconsin DNR publishes for Lake Pesobic, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7 ft. Phosphorus 22.2 µg/L. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 22.2µg/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. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lake Pesobic
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lake Pesobic typically sits around 76°F at the surface in August. Summer average is about 76°F. Usually warmest in Jul (about 78°F) and coldest in Apr (about 60°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (60°F) to its warmest (78°F).
Typical surface water temperature by month, from 18 field readings (2024–2026) via the EPA Water Quality Portal. See the full Lake Pesobic water temperature breakdown →
Wisconsin DNR lists Panfish as common on Lake Pesobic.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lake Pesobic’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 1986. 1 station on file (most recent sample 2026).
Fish Species (DNR-rated)
Lake Details
Max depth
11 ft
Surface area
147 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
23 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2 mi
HydroLAKES / HydroSHEDS
Elevation
1,302 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Pesobic 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 Lake Pesobic
Compare lakeside cabins, hotels, and vacation rentals near Lake Pesobic in Lincoln 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 Lake Pesobic
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Follow Lake Pesobic’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Lake Pesobic
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
Stable7 years
Phosphorus
Improving-0.97 µg/L/yr6 years
EPA Impairment Status
Lake Pesobic is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit WI10008934 · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Lake Pesobic under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Merrill City OfMerrill · 3.4 mi away · NPDES WI0020150MajorRecent 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.
Nearby Lakes in Lincoln County
Frequently asked questions about Lake Pesobic
Where is Lake Pesobic?
- Lake Pesobic is a lake in Lincoln County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Lake Pesobic?
- Lake Pesobic in Lincoln County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7 ft visibility. Phosphorus: 22.2 µg/L. Maximum depth: 11 ft. Surface area: 147 acres.
Is Lake Pesobic safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Pesobic is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
What is the water temperature of Lake Pesobic?
- Lake Pesobic typically sits around 76°F at the surface in August, from 18 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Lake Pesobic?
- Lake Pesobic has a maximum depth of 11 feet. The lake covers 147 acres.
What fish are in Lake Pesobic?
- Fish species found in Lake Pesobic include Panfish, Largemouth Bass, Northern Pike, Walleye. Lake Pesobic is located in Lincoln County, Wisconsin.
What did the DNR fisheries survey find at Lake Pesobic?
- Wisconsin DNR lists Panfish as common on Lake Pesobic. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lake Pesobic’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 Lake Pesobic?
- Lake Pesobic has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pesobic Lake. Public access is listed as yes.
Can I fish at Lake Pesobic?
- Lake Pesobic 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 Lake Pesobic across LakeQuality
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Fish species and best lakes in Lincoln County
Species activity outlook by water temperature and season
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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
44 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_WQX44 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
Impairment status from EPA ATTAINS 303(d) database
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