Willow Lake
Willow Lake in Oneida County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 410 acres.
Wisconsin DNR rates Panfish as abundant on Willow Lake. DNR survey details →
- Area
- 410 acres
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Why Willow Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Willow Lake, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Willow Lake is a 410-acre lake in Oneida County, Wisconsin.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Willow Lake water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Willow Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Willow Lake
Compare lakeside cabins, hotels, and vacation rentals near Willow Lake in Oneida 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 Willow Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Wisconsin DNR rates Panfish as abundant on Willow Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality does not assign an A–F grade on Willow Lake — official chemistry is on file, not a letter. 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 2019).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Willow Lake covering fish populations, stocking, water quality, and management. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2024Willow Flowage fisheries survey, 2024Fisheries Survey · WI DNR · 2024 (PDF)
- 2013Comprehensive Fisheries Survey of Willow Lake, 2013Comprehensive Survey · WI DNR · 2013 (PDF)
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 410 acres |
No bathymetric survey has been published for Willow Lake, so its depth is not documented here.
Fishing Willow Lake
Nearby Lakes in Oneida County
Frequently asked questions about Willow Lake
Where is Willow Lake?
- Willow Lake is a lake in Oneida County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Willow Lake?
- Willow Lake in Oneida County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 410 acres.
Is Willow Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Willow Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What did the DNR fisheries survey find at Willow Lake?
- Wisconsin DNR rates Panfish as abundant on Willow Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality does not assign an A–F grade on Willow Lake — official chemistry is on file, not a letter. Catch rate is not a swim clearance and is not a weekly bite report.
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Where this data comes from
Measurements for Willow Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.