Duck Lake
Langlade County, Wisconsin120 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Duck Lake. Here is what has been measured.
- Eutrophic
- 19 ft max depth
Duck Lake in Langlade County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 3.7 ft visibility. Phosphorus: 28.4 µg/L. Maximum depth: 19 ft. Surface area: 120 acres.
Wisconsin DNR rates Panfish as abundant on Duck Lake. DNR survey details →
Duck Lake is a 120-acre productive, nutrient-rich eutrophic lake in Langlade County, Wisconsin with a maximum depth of 19 feet. Overall water quality is improving over recent sampling years. The lake supports 4 documented fish species including Musky, Panfish, and Largemouth Bass. Compared to the 10 other monitored lakes in Langlade County, Duck Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-07-12. Methodology: how these readings are compared.
What Duck Lake is good for
From access and monitoring records, not editorial picks.
- Fishing4 species recorded
Swimming conditions
Readings onlyModerate algae
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 Duck 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 Duck Lake
These are the measurements Wisconsin DNR publishes for Duck Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 3.7 ft. Phosphorus 28.4 µg/L. TSI 55.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 28.4µg/L | Fair 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. | 55 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Duck Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR rates Panfish as abundant on Duck Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Duck Lake’s water-quality measurements separately, and the water-quality trend over 7 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 1993. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
19 ft
Surface area
120 acres
Lake Size & Watershed
Watershed (drainage) area
0 sq mi
HydroLAKES / HydroSHEDS
Shoreline
1.9 mi
HydroLAKES / HydroSHEDS
Elevation
1,719 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Duck Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Duck Lake
Water Quality Trend: Improving
Based on 7 years of monitoring (2020–2026).
Water clarity
Stable7 years
Phosphorus
Improving-1.14 µg/L/yr7 years
Nearby Lakes in Langlade County
Frequently asked questions about Duck Lake
Where is Duck Lake?
- Duck Lake is a lake in Langlade County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Duck Lake?
- Duck Lake in Langlade County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 3.7 ft visibility. Phosphorus: 28.4 µg/L. Maximum depth: 19 ft. Surface area: 120 acres.
Is Duck Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Duck Lake?
- Duck Lake has a maximum depth of 19 feet. The lake covers 120 acres.
What fish are in Duck Lake?
- Fish species found in Duck Lake include Musky, Panfish, Largemouth Bass, Northern Pike. Duck Lake is located in Langlade County, Wisconsin.
What did the DNR fisheries survey find at Duck Lake?
- Wisconsin DNR rates Panfish as abundant on Duck Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Duck Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Duck Lake across LakeQuality
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Where this data comes from
42 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_WQX42 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (2)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes