Swan Lake
Walworth County, Wisconsin27 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Swan Lake. Here is what has been measured.
- 7 ft max depth
- Limited data
Swan Lake in Walworth County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 6.8 ft visibility. Maximum depth: 7 ft. Surface area: 27 acres.
Wisconsin DNR lists Panfish as common on Swan Lake. DNR survey details →
Swan Lake is a 27-acre lake in Walworth County, Wisconsin with a maximum depth of 7 feet. Overall water quality is declining over recent sampling years. The lake supports 2 documented fish species including Panfish and Largemouth Bass.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-07-27. 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 Swan 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 Swan Lake
These are the measurements Wisconsin DNR publishes for Swan 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 6.8 ft. TSI 50.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6.8ft | 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. | 50 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Swan Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as common on Swan Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Swan 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. 1 station on file (most recent sample 2022).
Fish Species (DNR-rated)
Lake Details
Max depth
7 ft
Surface area
27 acres
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Fish Species
Click a species to see every lake where it is documented.
Fishing Swan Lake
Water Quality Trend: Worsening
Based on 7 years of monitoring (2020–2026).
Water clarity
Stable7 years
Phosphorus
Stable+0.09 µg/L/yr7 years
Chlorophyll-a
Worsening+1.05 µg/L/yr3 years
Nearby Lakes in Walworth County
Frequently asked questions about Swan Lake
Where is Swan Lake?
- Swan Lake is a lake in Walworth County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Swan Lake?
- Swan Lake in Walworth County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 6.8 ft visibility. Maximum depth: 7 ft. Surface area: 27 acres.
Is Swan Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Swan Lake?
- Swan Lake has a maximum depth of 7 feet. The lake covers 27 acres.
What fish are in Swan Lake?
- Fish species found in Swan Lake include Panfish, Largemouth Bass. Swan Lake is located in Walworth County, Wisconsin.
What did the DNR fisheries survey find at Swan Lake?
- Wisconsin DNR lists Panfish as common on Swan Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Swan 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
1 measurement from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX1 sample · 2022
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