Gull Lake
Gull Lake in Washburn County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11 ft visibility. Phosphorus: 11.1 µg/L. Maximum depth: 19 ft. Surface area: 518 acres.
Wisconsin DNR rates Panfish as abundant on Gull Lake. DNR survey details →
- Clarity
- 11 ft
- Max depth
- 19 ft
- Area
- 518 acres
- Trend
- ↑ Improving
- Public access
- Yes
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Why Gull 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 Gull Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
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.
Gull Lake is a 518-acre lake in Washburn County, Wisconsin with a maximum depth of 19 feet. Overall water quality is improving over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-25. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Gull Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 11 ft. Phosphorus level: 11.1 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11 ft | Not graded |
| Phosphorus | 11.1 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Gull Lake
Compare lakeside cabins, hotels, and vacation rentals near Gull Lake 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 Gull 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 Gull 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 Gull Lake — official chemistry is on file, not a letter, and the water-quality trend over 2 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. 1 station on file (most recent sample 2024).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 19 ft |
| Surface Area | 518 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Gull LakePublic
- Gull LakePublic
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 Gull 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.
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.625 m/yr | 2 |
Graded lakes near Gull Lake
Gull Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Washburn County
Frequently asked questions about Gull Lake
Where is Gull Lake?
- Gull Lake is a lake in Washburn County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Gull Lake?
- Gull Lake in Washburn County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11 ft visibility. Phosphorus: 11.1 µg/L. Maximum depth: 19 ft. Surface area: 518 acres.
Is Gull Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Gull Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Gull Lake?
- Gull Lake has a maximum depth of 19 feet. The lake covers 518 acres.
What fish are in Gull Lake?
- Fish species found in Gull Lake include Panfish, Largemouth Bass, Northern Pike. Gull Lake is located in Washburn County, Wisconsin.
What did the DNR fisheries survey find at Gull Lake?
- Wisconsin DNR rates Panfish as abundant on Gull 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 Gull Lake — official chemistry is on file, not a letter, and the water-quality trend over 2 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Gull Lake?
- Gull Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Gull Lake, Gull Lake. Public access is listed as yes.
Explore Gull Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
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Fish species and best lakes in Washburn County
Species activity outlook by water temperature and season
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Where this data comes from
10 measurements from 1 monitoring station, 2022–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX10 samples · 2022–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
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