Perch Lake
Oneida County, Wisconsin34 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Perch Lake. Here is what has been measured.
- Mesotrophic
- 56 ft max depth
- Public access
Perch Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 15 ft visibility. Phosphorus: 14.8 µg/L. Maximum depth: 56 ft. Surface area: 34 acres.
Wisconsin DNR lists Panfish as present on Perch Lake. DNR survey details →
Perch Lake is a 34-acre mesotrophic lake in Oneida County, Wisconsin with a maximum depth of 56 feet. The lake supports 2 documented fish species including Panfish and Largemouth Bass. Public access is available. Compared to the 66 other monitored lakes in Oneida County, Perch Lake ranks #19 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-28. Methodology: how these readings are compared.
What Perch Lake is good for
From access and monitoring records, not editorial picks.
- Clear water15 ft of visibility
- Deep water56 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 Perch 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 Perch Lake
These are the measurements Wisconsin DNR publishes for Perch 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 15 ft down. Phosphorus 14.8 µg/L. TSI 41.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 15ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 14.8µg/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. | 41 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Perch Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Perch Lake typically sits around 75°F at the surface in July. Summer average is about 77°F. Usually warmest in Jun (about 79°F) and coldest in May (about 47°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (47°F) to its warmest (79°F).
Typical surface water temperature by month, from 18 field readings (2024–2025) via the EPA Water Quality Portal. See the full Perch Lake water temperature breakdown →
Wisconsin DNR lists Panfish as present on Perch Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Perch Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is stable. 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 2002. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
56 ft
Surface area
34 acres
Public access
Yes
Listed by Wisconsin DNR
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Stays near Perch Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Perch 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: Stable
Based on 7 years of monitoring (2020–2026).
Water clarity
Stable7 years
Phosphorus
Stable+0.32 µg/L/yr7 years
Nearby Lakes in Oneida County
Frequently asked questions about Perch Lake
Where is Perch Lake?
- Perch Lake is a lake in Oneida County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Perch Lake?
- Perch Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 15 ft visibility. Phosphorus: 14.8 µg/L. Maximum depth: 56 ft. Surface area: 34 acres.
Is Perch Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Perch Lake?
- Perch Lake typically sits around 75°F at the surface in July, from 18 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Perch Lake?
- Perch Lake has a maximum depth of 56 feet. The lake covers 34 acres.
What fish are in Perch Lake?
- Fish species found in Perch Lake include Panfish, Largemouth Bass. Perch Lake is located in Oneida County, Wisconsin.
What did the DNR fisheries survey find at Perch Lake?
- Wisconsin DNR lists Panfish as present on Perch Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Perch Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Perch Lake?
- Public access to Perch 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
45 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_WQX45 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