Fawn Lake
Vilas County, Wisconsin19 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Fawn Lake. Here is what has been measured.
- 10 ft max depth
- Limited data
Fawn Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 9 ft visibility. Maximum depth: 10 ft. Surface area: 19 acres.
Wisconsin DNR lists Panfish as common on Fawn Lake. DNR survey details →
Fawn Lake is a 19-acre lake in Vilas County, Wisconsin with a maximum depth of 10 feet. Overall water quality is declining over recent sampling years. The lake supports 5 documented fish species including Musky, Panfish, and Largemouth Bass.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-10-21. Methodology: how these readings are compared.
What Fawn Lake is good for
From access and monitoring records, not editorial picks.
- Fishing5 species recorded
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Fawn 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 Fawn Lake
These are the measurements Wisconsin DNR publishes for Fawn Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 9 ft. TSI 45.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| 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. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Fawn Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as common on Fawn Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Fawn Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is declining. 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. 2 stations on file (most recent sample 2024).
Fish Species (DNR-rated)
Lake Details
Max depth
10 ft
Surface area
19 acres
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Fish Species
Click a species to see every lake where it is documented.
Fishing Fawn Lake
Water Quality Trend: Worsening
Based on 7 years of monitoring (2020–2026).
Water clarity
Stable5 years
Phosphorus
Worsening+1.4 µg/L/yr3 years
Reservoir Info (USACE NID)
Fawn Lake is a man-made reservoir impounded by the Big St Germain (completed 1923), built primarily for hydroelectric on the St Germain River; gravity-type dam, 7 ft tall and 117 ft long.
- Max storage
- 33,655 ac-ft
- Drainage area
- 73.1 sq mi
- Hazard class
- Low
- Owner
- Wisconsin Valley Improvement Company
All listed purposes: Hydroelectric;Flood Risk Reduction.
Source: USACE National Inventory of Dams, NID ID WI01146 · Operator website · Matched by proximity (0.29 km)
Nearby Lakes in Vilas County
Frequently asked questions about Fawn Lake
Where is Fawn Lake?
- Fawn Lake is a lake in Vilas County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Fawn Lake?
- Fawn Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 9 ft visibility. Maximum depth: 10 ft. Surface area: 19 acres.
Is Fawn Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Fawn Lake?
- Fawn Lake has a maximum depth of 10 feet. The lake covers 19 acres.
What fish are in Fawn Lake?
- Fish species found in Fawn Lake include Musky, Panfish, Largemouth Bass, Northern Pike, Walleye. Fawn Lake is located in Vilas County, Wisconsin.
What did the DNR fisheries survey find at Fawn Lake?
- Wisconsin DNR lists Panfish as common on Fawn Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Fawn Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
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Where this data comes from
30 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX30 samples · 2020–2024
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