Deer Lake
Iron County, Wisconsin33 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Deer Lake. Here is what has been measured.
- 18 ft max depth
- Public access
- Limited data
Deer Lake in Iron County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7.5 ft visibility. Maximum depth: 18 ft. Surface area: 33 acres.
Wisconsin DNR lists Panfish as present on Deer Lake. DNR survey details →
Deer Lake is a 33-acre lake in Iron County, Wisconsin with a maximum depth of 18 feet. Overall water quality is improving over recent sampling years. The lake supports 2 documented fish species including Panfish and Largemouth Bass. Public access is available.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2023-08-21. 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 Deer 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 Deer Lake
These are the measurements Wisconsin DNR publishes for Deer 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 7.5 ft. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7.5ft | 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. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Deer Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as present on Deer Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Deer 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. 1 station on file (most recent sample 2023).
Fish Species (DNR-rated)
Lake Details
Max depth
18 ft
Surface area
33 acres
Public access
Yes
Listed by Wisconsin DNR
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Fish Species
Click a species to see every lake where it is documented.
Fishing Deer Lake
Water Quality Trend: Improving
Based on 7 years of monitoring (2020–2026).
Water clarity
Improving7 years
Phosphorus
Stable+0.13 µg/L/yr7 years
Nearby Lakes in Iron County
Frequently asked questions about Deer Lake
Where is Deer Lake?
- Deer Lake is a lake in Iron County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Deer Lake?
- Deer Lake in Iron County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7.5 ft visibility. Maximum depth: 18 ft. Surface area: 33 acres.
Is Deer Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Deer Lake?
- Deer Lake has a maximum depth of 18 feet. The lake covers 33 acres.
What fish are in Deer Lake?
- Fish species found in Deer Lake include Panfish, Largemouth Bass. Deer Lake is located in Iron County, Wisconsin.
What did the DNR fisheries survey find at Deer Lake?
- Wisconsin DNR lists Panfish as present on Deer Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Deer 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.
Can I fish at Deer Lake?
- Public access to Deer 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
7 measurements from 1 monitoring station, 2021–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX7 samples · 2021–2023
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