Perch Lake
Langlade County, Wisconsin25 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Perch Lake. Here is what has been measured.
- Oligotrophic
- 21 ft max depth
- Public access
- Limited data
Perch Lake in Langlade County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 17.3 ft visibility. Phosphorus: 13.4 µg/L. Maximum depth: 21 ft. Surface area: 25 acres.
Wisconsin DNR lists Panfish as common on Perch Lake. DNR survey details →
Perch Lake is a 25-acre cold, clear oligotrophic lake in Langlade County, Wisconsin with a maximum depth of 21 feet. Water clarity is improving over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 2 public boat landings. Compared to the 10 other monitored lakes in Langlade County, Perch Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-02. Methodology: how these readings are compared.
What Perch Lake is good for
From access and monitoring records, not editorial picks.
- Clear water17.3 ft of visibility
- Boat launch2 documented ramps
- Fishing3 species recorded
Swimming conditions
Readings onlyLimited data
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 17.3 ft down. Phosphorus 13.4 µg/L. TSI 39.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 17.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 13.4µg/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. | 39 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Perch Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Perch Lake typically sits around 66°F at the surface in September. Summer average is about 70°F. Usually warmest in Jun (about 70°F) and coldest in May (about 58°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (58°F) to its warmest (70°F).
Typical surface water temperature by month, from 10 field readings (2024–2025) via the EPA Water Quality Portal. See the full Perch Lake water temperature breakdown →
Wisconsin DNR lists Panfish as common 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 4 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 2006. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
21 ft
Surface area
25 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Highway UPublic
- Perch Lake RoadPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Perch Lake
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Top-rated places to stay near Perch Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Perch Lake
Water Quality Trend: Stable
Based on 4 years of monitoring (2022–2025).
Water clarity
Improving4 years
Phosphorus
Worsening+1.5 µg/L/yr2 years
Nearby Lakes in Langlade County
Frequently asked questions about Perch Lake
Where is Perch Lake?
- Perch Lake is a lake in Langlade 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 Langlade County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 17.3 ft visibility. Phosphorus: 13.4 µg/L. Maximum depth: 21 ft. Surface area: 25 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 66°F at the surface in September, from 10 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 21 feet. The lake covers 25 acres.
What fish are in Perch Lake?
- Fish species found in Perch Lake include Panfish, Largemouth Bass, Northern Pike. Perch Lake is located in Langlade County, Wisconsin.
What did the DNR fisheries survey find at Perch Lake?
- Wisconsin DNR lists Panfish as common 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 4 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Perch Lake?
- Perch Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Highway U, Perch Lake Road. Public access is listed as yes.
Can I fish at Perch Lake?
- Perch Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. 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
36 measurements from 1 monitoring station, 2022–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX36 samples · 2022–2025
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
Named boat-access points from the USGS National Boat Ramps inventory