Krohns Lake
Kewaunee County, Wisconsin19 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Krohns Lake. Here is what has been measured.
- Mesotrophic
- Curly-Leaf Pondweed
- 38 ft max depth
- Public access
- Limited data
Krohns Lake in Kewaunee County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 8 ft visibility. Phosphorus: 11.6 µg/L. Maximum depth: 38 ft. Surface area: 19 acres.
Wisconsin DNR lists Panfish as common on Krohns Lake. DNR survey details →
Krohns Lake is a 19-acre mesotrophic lake in Kewaunee County, Wisconsin with a maximum depth of 38 feet. Overall water quality is improving over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Trout. Public access is available with 1 public boat landing. Compared to the 2 other monitored lakes in Kewaunee County, Krohns Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-10-18. Methodology: how these readings are compared.
What Krohns Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing3 species recorded
- Deep water38 ft surveyed max depth
Swimming conditions
Readings onlyLimited data
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. Check local advisories before you swim.
Whether Krohns Lake 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 Krohns Lake
These are the measurements Wisconsin DNR publishes for Krohns Lake, 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 8 ft. Phosphorus 11.6 µg/L. TSI 43.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 11.6µg/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. | 43 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Krohns Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as common on Krohns Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Krohns Lake’s water-quality measurements separately, and the water-quality trend over 5 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 2004. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Krohns 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).
- 2021Krohns Lake spring shocking survey, 2021Spring Shocking Survey · WI DNR · 2021 (PDF)
Lake Details
Max depth
38 ft
Surface area
19 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Krohns LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Krohns Lake
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Top-rated places to stay near Krohns Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Krohns 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: Improving
Based on 5 years of monitoring (2020–2025).
Water clarity
Improving5 years
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Krohns Lake under Clean Water Act (NPDES) discharge permits. 2 facilities have a reported Clean Water Act violation in the past three years.
- Ebert Dairy Enterprises LlcPierce, Town Of · 0.8 mi away · NPDES WI0062235Recent violation
- El Na Farms LlcLincoln, Town Of · 3.9 mi away · NPDES WI0063061Recent violation
- Algoma Lumber Company IncAlgoma · 2.3 mi away · NPDES WI0052337
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 Kewaunee County
Frequently asked questions about Krohns Lake
Where is Krohns Lake?
- Krohns Lake is a lake in Kewaunee County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Krohns Lake?
- Krohns Lake in Kewaunee County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 8 ft visibility. Phosphorus: 11.6 µg/L. Maximum depth: 38 ft. Surface area: 19 acres.
Is Krohns Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Krohns Lake?
- Krohns Lake has a maximum depth of 38 feet. The lake covers 19 acres.
What fish are in Krohns Lake?
- Fish species found in Krohns Lake include Panfish, Largemouth Bass, Trout. Krohns Lake is located in Kewaunee County, Wisconsin.
What did the DNR fisheries survey find at Krohns Lake?
- Wisconsin DNR lists Panfish as common on Krohns Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Krohns Lake’s water-quality measurements separately, and the water-quality trend over 5 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Krohns Lake?
- Krohns Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Krohns Lake. Public access is listed as yes.
Can I fish at Krohns Lake?
- Krohns Lake 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 Krohns Lake across LakeQuality
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Where this data comes from
53 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX53 samples · 2020–2025
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory