Lake Pesobic
Lake Pesobic in Lincoln County, Wisconsin has a water quality grade of B (Good). Water clarity: 7 ft visibility. Phosphorus: 22.2 µg/L. Maximum depth: 11 ft. Surface area: 147 acres.
- Clarity
- 7 ft
- Typical in August
- 76°F
- Max depth
- 11 ft
- Area
- 147 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Lincoln County
Lake Pesobic is a 147-acre mesotrophic lake in Lincoln County, Wisconsin with a maximum depth of 11 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 2 public boat landings. 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. Grade methodology: LakeGrade 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)
Moderate clarity, visible to about 7 ft. Phosphorus level: 22.2 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | Not graded |
| Phosphorus | 22.2 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay 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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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.
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 →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 11 ft |
| Surface Area | 147 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Riverside ParkPublic
- Pesobic LakePublic
Fish Species
Click a species to see every graded 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.
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)
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.071 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.97 µg/L/yr | 6 |
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
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.
County Ranking
Ranked #7 of 13 lakes in Lincoln County
Nearby Lakes in Lincoln County
Frequently asked questions about Lake Pesobic
What is the water quality grade for Lake Pesobic?
- Lake Pesobic in Lincoln County, Wisconsin has a water quality grade of B (Good). 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?
- Good for swimming, clear water with low algae levels. Lake Pesobic has a water quality grade of B (Good). Always check local health department advisories before swimming.
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.
Are there boat ramps on Lake Pesobic?
- Lake Pesobic has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Riverside Park, Pesobic Lake. Public access is listed as yes.
Explore Lake Pesobic across LakeGrade
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Moderate nutrients, good water quality
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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)
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
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