Wolf Lake
Wolf Lake in Fond du Lac County, Wisconsin has a water quality grade of B (Good). Water clarity: 5 ft visibility. Phosphorus: 31 µg/L. Maximum depth: 47 ft. Surface area: 75 acres.
- Clarity
- 5 ft
- Max depth
- 47 ft
- Area
- 75 acres
- Type
- Eutrophic
- Trend
- ↓ Declining
- Public access
- Yes
Next lake in Fond du Lac County
Wolf Lake is a 75-acre productive, nutrient-rich eutrophic lake in Fond du Lac County, Wisconsin with a maximum depth of 47 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 8 other monitored lakes in Fond du Lac County, Wolf Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-16. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
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)
Murky, only visible to about 5 ft. Phosphorus level: 31 µg/L. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | Not graded |
| Phosphorus | 31 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Wolf Lake
Compare lakeside cabins, hotels, and vacation rentals near Wolf Lake in Fond du Lac 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 47 ft |
| Surface Area | 75 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Wolf Lake County ParkPublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Wolf 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.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 5 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Water Quality Trend: ↓ Declining
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.425 m/yr | 4 |
| Phosphorus | ↓ Declining | +14 µg/L/yr | 3 |
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Wolf Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- St Cloud Village Utility CommissionSaint Cloud · 3.9 mi away · NPDES WI0026867Recent violation
- Lisowe Acres LlcCalumet, Town Of · 4.6 mi away · NPDES WI0064840
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 #2 of 9 lakes in Fond du Lac County
Nearby Lakes in Fond du Lac County
Frequently asked questions about Wolf Lake
What is the water quality grade for Wolf Lake?
- Wolf Lake in Fond du Lac County, Wisconsin has a water quality grade of B (Good). Water clarity: 5 ft visibility. Phosphorus: 31 µg/L. Maximum depth: 47 ft. Surface area: 75 acres.
Is Wolf Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Wolf Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Wolf Lake?
- Wolf Lake has a maximum depth of 47 feet. The lake covers 75 acres.
What fish are in Wolf Lake?
- Fish species found in Wolf Lake include Panfish, Largemouth Bass, Northern Pike, Walleye. Wolf Lake is located in Fond du Lac County, Wisconsin.
Are there boat ramps on Wolf Lake?
- Wolf Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Wolf Lake County Park. Public access is listed as yes.
Explore Wolf Lake across LakeGrade
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High nutrients, frequent algae, reduced clarity
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Where this data comes from
60 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_WQX60 samples · 2020–2026
Analytical methods
- Total Phosphorus After Block Digestion
- 2130 B ~ Nephelometric Method
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
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