Korth Lake
Shawano County, Wisconsin22 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Korth Lake. Here is what has been measured.
- Mesotrophic
- Impaired · Cause unknown
- 2 aquatic invasives
- 48 ft max depth
- Public access
- Limited data
Korth Lake in Shawano County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 12 ft visibility. Phosphorus: 13.5 µg/L. Maximum depth: 48 ft. Surface area: 22 acres.
Wisconsin DNR lists Largemouth Bass as common on Korth Lake. DNR survey details →
Korth Lake is a 22-acre mesotrophic lake in Shawano County, Wisconsin with a maximum depth of 48 feet. 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 20 other monitored lakes in Shawano County, Korth Lake ranks #13 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2020-09-02. Methodology: how these readings are compared.
What Korth Lake is good for
From access and monitoring records, not editorial picks.
- Clear water12 ft of visibility
- Boat launch1 documented ramp
- Fishing4 species recorded
- Deep water48 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. Korth Lake is listed impaired under Clean Water Act §303(d) (IR 5) for cause unknown. Check local advisories before you swim.
Whether Korth 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 Korth Lake
These are the measurements Wisconsin DNR publishes for Korth Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 12 ft. Phosphorus 13.5 µg/L. TSI 41.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 12ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 13.5µg/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. | 41 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Korth Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Largemouth Bass as common on Korth Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Korth Lake’s water-quality measurements separately. 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. 1 station on file (most recent sample 2020).
Fish Species (DNR-rated)
Lake Details
Max depth
48 ft
Surface area
22 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Korth 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 Korth Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Korth 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.
EPA Impairment Status
Korth Lake 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: Aquatic life.
Source: EPA ATTAINS assessment unit WI10009456 · Official waterbody report
Nearby Lakes in Shawano County
Frequently asked questions about Korth Lake
Where is Korth Lake?
- Korth Lake is a lake in Shawano County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Korth Lake?
- Korth Lake in Shawano County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 12 ft visibility. Phosphorus: 13.5 µg/L. Maximum depth: 48 ft. Surface area: 22 acres.
Is Korth Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Korth Lake is listed impaired under Clean Water Act §303(d) (IR 5) for cause unknown. Check local advisories before you swim.
How deep is Korth Lake?
- Korth Lake has a maximum depth of 48 feet. The lake covers 22 acres.
What fish are in Korth Lake?
- Fish species found in Korth Lake include Panfish, Largemouth Bass, Northern Pike, Trout. Korth Lake is located in Shawano County, Wisconsin.
What did the DNR fisheries survey find at Korth Lake?
- Wisconsin DNR lists Largemouth Bass as common on Korth Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Korth Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Korth Lake?
- Korth Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Korth Lake. Public access is listed as yes.
Can I fish at Korth Lake?
- Korth 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 Korth Lake across LakeQuality
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Where this data comes from
7 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX7 samples · 2020
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
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory