Duck Lake
Duck Lake in Langlade County, Wisconsin has a water quality grade of C (Fair). Water clarity: 3.7 ft visibility. Phosphorus: 28.4 µg/L. Maximum depth: 19 ft. Surface area: 120 acres.
- Clarity
- 3.7 ft
- Max depth
- 19 ft
- Area
- 120 acres
- Type
- Eutrophic
- Trend
- ↑ Improving
Next lake in Langlade County
Duck Lake is a 120-acre productive, nutrient-rich eutrophic lake in Langlade County, Wisconsin with a maximum depth of 19 feet. Water quality is graded C based on 1 sampling years through 2026. 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. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyModerate
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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Murky, only visible to about 3.7 ft. Phosphorus level: 28.4 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.7 ft | Not graded |
| Phosphorus | 28.4 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Duck Lake
Compare lakeside cabins, hotels, and vacation rentals near Duck Lake in Langlade 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.
Top-rated places to stay near Duck Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 19 ft |
| Surface Area | 120 acres |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Duck Lake
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)
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | 0 m/yr | 7 |
| Phosphorus | ↑ Improving | -1.14 µg/L/yr | 7 |
EPA Impairment Status
Duck Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10007039 · Official waterbody report · Matched by proximity (2.13 km)
County Ranking
Ranked #8 of 11 lakes in Langlade County
Nearby Lakes With Higher Grades
Duck Lake holds Grade C. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Langlade County
Frequently asked questions about Duck Lake
What is the water quality grade for Duck Lake?
- Duck Lake in Langlade County, Wisconsin has a water quality grade of C (Fair). 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?
- Generally safe for swimming, moderate water quality. Duck Lake has a water quality grade of C (Fair). Always check local health department advisories before swimming.
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.
Explore Duck Lake across LakeGrade
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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)
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes