Wilke Lake
Wilke Lake in Manitowoc County, Wisconsin has a water quality grade of B (Good). Water clarity: 7 ft visibility. Phosphorus: 17.1 µg/L. Maximum depth: 21 ft. Surface area: 93 acres.
- Clarity
- 7 ft
- Max depth
- 21 ft
- Area
- 93 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Manitowoc County
Wilke Lake is a 93-acre mesotrophic lake in Manitowoc County, Wisconsin with a maximum depth of 21 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 5 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 1 public boat landing. Compared to the 15 other monitored lakes in Manitowoc County, Wilke Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-04-13. Grade methodology: LakeGrade methodology.
Watch Wilke Lake water quality
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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: 17.1 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | Not graded |
| Phosphorus | 17.1 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Wilke Lake
Compare lakeside cabins, hotels, and vacation rentals near Wilke Lake in Manitowoc 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 | 21 ft |
| Surface Area | 93 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Wilke LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Wilke 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. Monitored by volunteers since 2003. 1 station on file (most recent sample 2026).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Wilke Lake covering fish populations, stocking, water quality, and management. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2018Wilke Lake comprehensive survey 2018Comprehensive Survey · WI DNR · 2018 (PDF)
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.157 m/yr | 6 |
| Phosphorus | ↑ Improving | -0.55 µg/L/yr | 6 |
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Wilke Lake under Clean Water Act (NPDES) discharge permits.
- Henning'S Cheese IncSchleswig, Town Of · 0.4 mi away · NPDES WI0070572
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 16 lakes in Manitowoc County
Nearby Lakes in Manitowoc County
Frequently asked questions about Wilke Lake
What is the water quality grade for Wilke Lake?
- Wilke Lake in Manitowoc County, Wisconsin has a water quality grade of B (Good). Water clarity: 7 ft visibility. Phosphorus: 17.1 µg/L. Maximum depth: 21 ft. Surface area: 93 acres.
Is Wilke Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Wilke Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Wilke Lake?
- Wilke Lake has a maximum depth of 21 feet. The lake covers 93 acres.
What fish are in Wilke Lake?
- Fish species found in Wilke Lake include Musky, Panfish, Largemouth Bass, Northern Pike, Walleye. Wilke Lake is located in Manitowoc County, Wisconsin.
Are there boat ramps on Wilke Lake?
- Wilke Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Wilke Lake. Public access is listed as yes.
Explore Wilke Lake across LakeGrade
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Moderate nutrients, good water quality
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Where this data comes from
51 measurements from 2 monitoring stations, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX51 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
- Total Phosphorus After Block Digestion
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (2)
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