Eagle Lake
Bayfield County, Wisconsin163 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Eagle Lake. Here is what has been measured.
- Oligotrophic
- 52 ft max depth
Eagle Lake in Bayfield County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 17 ft visibility. Phosphorus: 14.6 µg/L. Maximum depth: 52 ft. Surface area: 163 acres.
Wisconsin DNR rates Largemouth Bass as abundant on Eagle Lake. DNR survey details →
Eagle Lake is a 163-acre cold, clear oligotrophic lake in Bayfield County, Wisconsin with a maximum depth of 52 feet. Overall water quality is improving over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Compared to the 23 other monitored lakes in Bayfield County, Eagle Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-14. Methodology: how these readings are compared.
What Eagle Lake is good for
From access and monitoring records, not editorial picks.
- Clear water17 ft of visibility
- Fishing6 species recorded
- Deep water52 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Eagle Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Eagle Lake
These are the measurements Wisconsin DNR publishes for Eagle Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 17 ft down. Phosphorus 14.6 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 17ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 14.6µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 40 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Eagle Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR rates Largemouth Bass as abundant on Eagle Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Eagle Lake’s water-quality measurements separately, and the water-quality trend over 7 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 1991. 5 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
52 ft
Surface area
163 acres
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Stays near Eagle Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Eagle 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 7 years of monitoring (2020–2026).
Water clarity
Improving6 years
Phosphorus
Stable0 µg/L/yr7 years
Nearby Lakes in Bayfield County
Frequently asked questions about Eagle Lake
Where is Eagle Lake?
- Eagle Lake is a lake in Bayfield County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Eagle Lake?
- Eagle Lake in Bayfield County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 17 ft visibility. Phosphorus: 14.6 µg/L. Maximum depth: 52 ft. Surface area: 163 acres.
Is Eagle Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Eagle Lake?
- Eagle Lake has a maximum depth of 52 feet. The lake covers 163 acres.
What fish are in Eagle Lake?
- Fish species found in Eagle Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Eagle Lake is located in Bayfield County, Wisconsin.
What did the DNR fisheries survey find at Eagle Lake?
- Wisconsin DNR rates Largemouth Bass as abundant on Eagle Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Eagle Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Eagle Lake across LakeQuality
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Where this data comes from
70 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX70 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Fish and recreation data from Wisconsin DNR Lakes