Wiley Lake
Bayfield County, WisconsinView mapDirections
No nutrient or algae sampling on record from Wisconsin DNR for this lake.
- Public access
- Limited data
Wiley Lake in Bayfield County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported.
Wiley Lake is a lake in Bayfield County, Wisconsin. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-11-15. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Wiley 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 Wiley Lake
These are the measurements Wisconsin DNR publishes for Wiley Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Wiley Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Wiley Lake
Compare lakeside cabins, hotels, and vacation rentals near Wiley Lake in Bayfield 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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Fishing Wiley Lake
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Worsening+0.3 µg/L/yr3 years
Nearby Lakes in Bayfield County
Frequently asked questions about Wiley Lake
Where is Wiley Lake?
- Wiley 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 Wiley Lake?
- Wiley Lake in Bayfield County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported.
Is Wiley Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Can I fish at Wiley Lake?
- Public access to Wiley Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
6 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX6 samples · 2024–2025
Analytical methods
- Total Phosphorus After Block Digestion
- 2130 B ~ Nephelometric Method
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.