Gaslyn Lake
Gaslyn Lake in Burnett County, Wisconsin has a water quality grade of A (Excellent). Water clarity: 4.5 ft visibility. Phosphorus: 31.5 µg/L. Chlorophyll-a (algae): 4.2 µg/L. Maximum depth: 12 ft. Surface area: 161 acres.
- Clarity
- 4.5 ft
- Typical in August
- 71°F
- Max depth
- 12 ft
- Area
- 161 acres
- Type
- Eutrophic
- Trend
- → Stable
- Public access
- Yes
Next lake in Burnett County
Gaslyn Lake is a 161-acre productive, nutrient-rich eutrophic lake in Burnett County, Wisconsin with a maximum depth of 12 feet. Water quality is graded A based on 2 sampling years through 2025. Water clarity 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. Compared to the 29 other monitored lakes in Burnett County, Gaslyn Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-10-27. Grade methodology: LakeGrade 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.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Murky, only visible to about 4.5 ft. Phosphorus level: 31.5 µg/L. Chlorophyll-a: 4.2 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.5 ft | Not graded |
| Phosphorus | 31.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 4.2 µg/L | Good |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Gaslyn Lake
Compare lakeside cabins, hotels, and vacation rentals near Gaslyn Lake in Burnett 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.
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Water Temperature
Gaslyn Lake typically sits around 71°F at the surface in August. Summer average is about 74°F. Usually warmest in Jul (about 77°F) and coldest in Oct (about 50°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 72 field readings (2024–2025) via the EPA Water Quality Portal. See the full Gaslyn Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 12 ft |
| Surface Area | 161 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Gaslyn LakePublic
Showing 1 of 2 documented landings from the USGS National Boat Ramps inventory.
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Gaslyn 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.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 1979).
Fish Species (DNR-rated)
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.114 m/yr | 6 |
| Phosphorus | → Stable | -0.56 µg/L/yr | 6 |
| Chlorophyll-a | ↓ Declining | +0.14 µg/L/yr | 6 |
County Ranking
Ranked #2 of 30 lakes in Burnett County
Nearby Lakes in Burnett County
Frequently asked questions about Gaslyn Lake
What is the water quality grade for Gaslyn Lake?
- Gaslyn Lake in Burnett County, Wisconsin has a water quality grade of A (Excellent). Water clarity: 4.5 ft visibility. Phosphorus: 31.5 µg/L. Chlorophyll-a (algae): 4.2 µg/L. Maximum depth: 12 ft. Surface area: 161 acres.
Is Gaslyn Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Gaslyn Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 4.2 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Gaslyn Lake?
- Gaslyn Lake typically sits around 71°F at the surface in August, from 72 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Gaslyn Lake?
- Gaslyn Lake has a maximum depth of 12 feet. The lake covers 161 acres.
What fish are in Gaslyn Lake?
- Fish species found in Gaslyn Lake include Panfish, Largemouth Bass, Northern Pike. Gaslyn Lake is located in Burnett County, Wisconsin.
Are there boat ramps on Gaslyn Lake?
- Gaslyn Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Gaslyn Lake, among others. Public access is listed as yes.
Explore Gaslyn Lake across LakeGrade
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Species activity outlook by water temperature and season
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High nutrients, frequent algae, reduced clarity
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Where this data comes from
274 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- St. Croix Chippewa Indians of Wisconsin
STCROIX_WQX274 samples · 2020–2025
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 4500 P F ~ Phosphorus in Water by Colorimetry Automated Ascorbic Acid Method
- 10200 H ~ Chlorophyll a-b-c Determination
- Calculation
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