Lake Nancy
Lake Nancy in Washburn County, Wisconsin has a water quality grade of B (Good). Water clarity: 14 ft visibility. Phosphorus: 13.5 µg/L. Maximum depth: 39 ft. Surface area: 757 acres.
Wisconsin DNR rates Panfish as abundant on Lake Nancy. DNR survey details →
- Clarity
- 14 ft
- Max depth
- 39 ft
- Area
- 757 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
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Lake Nancy is a 757-acre mesotrophic lake in Washburn County, Wisconsin with a maximum depth of 39 feet. Water quality is graded B based on 1 sampling years through 2025. Overall water quality is improving over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 2 public boat landings. Compared to the 26 other monitored lakes in Washburn County, Lake Nancy ranks #15 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-08-17. Grade methodology: LakeQuality methodology.
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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)
Good clarity, visible to about 14 ft. Phosphorus level: 13.5 µg/L. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14 ft | Not graded |
| Phosphorus | 13.5 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Nancy
Compare lakeside cabins, hotels, and vacation rentals near Lake Nancy in Washburn 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 Lake Nancy
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Wisconsin DNR rates Panfish as abundant on Lake Nancy.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Lake Nancy B from EPA Water Quality Portal chemistry, and the water-quality trend over 6 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 2001. 4 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 39 ft |
| Surface Area | 757 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Nancy LakePublic
- Lake NancyPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Lake Nancy
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 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.136 m/yr | 6 |
| Phosphorus | ↑ Improving | -0.55 µg/L/yr | 6 |
County Ranking
Ranked #15 of 27 lakes in Washburn County
Nearby Lakes in Washburn County
Frequently asked questions about Lake Nancy
Where is Lake Nancy?
- Lake Nancy is a lake in Washburn County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Nancy?
- Lake Nancy in Washburn County, Wisconsin has a water quality grade of B (Good). Water clarity: 14 ft visibility. Phosphorus: 13.5 µg/L. Maximum depth: 39 ft. Surface area: 757 acres.
Is Lake Nancy safe to swim in?
- Good for swimming, clear water with low algae levels. Lake Nancy has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Lake Nancy?
- Lake Nancy has a maximum depth of 39 feet. The lake covers 757 acres.
What fish are in Lake Nancy?
- Fish species found in Lake Nancy include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Lake Nancy is located in Washburn County, Wisconsin.
What did the DNR fisheries survey find at Lake Nancy?
- Wisconsin DNR rates Panfish as abundant on Lake Nancy. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Lake Nancy B from EPA Water Quality Portal chemistry, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Lake Nancy?
- Lake Nancy has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Nancy Lake, Lake Nancy. Public access is listed as yes.
Explore Lake Nancy across LakeQuality
Depth, room, public access, and the state wake-sport rules
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Washburn County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Hayward Lakes area
Where to stay at Wisconsin's top lakes, each with its grade
Lakes in the Chippewa River Watershed, ranked by water quality
Moderate nutrients, good water quality
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Compare Lake Nancy With Nearby Lakes
Where this data comes from
71 measurements from 2 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX71 samples · 2020–2025
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
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