Perch Lake
Perch Lake in Langlade County, Wisconsin has a water quality grade of B (Good). Water clarity: 17.3 ft visibility. Phosphorus: 13.4 µg/L. Maximum depth: 21 ft. Surface area: 25 acres.
- Clarity
- 17.3 ft
- Typical in September
- 66°F
- Max depth
- 21 ft
- Area
- 25 acres
- Type
- Oligotrophic
- Trend
- → Stable
- Public access
- Yes
Next lake in Langlade County
Perch Lake is a 25-acre cold, clear oligotrophic lake in Langlade County, Wisconsin with a maximum depth of 21 feet. Water quality is graded B based on 1 sampling years through 2025. 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. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Crystal clear, you can see 17.3 ft down. Phosphorus level: 13.4 µg/L. Trophic State Index: 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 17.3 ft | Not graded |
| Phosphorus | 13.4 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Perch Lake
Compare lakeside cabins, hotels, and vacation rentals near Perch Lake in Langlade County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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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.
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 →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 21 ft |
| Surface Area | 25 acres |
| Public Access | Yes |
Recreation & Access
- Highway UPublic
- Perch Lake RoadPublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Perch Lake
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)
Water Quality Trend: → Stable
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.315 m/yr | 4 |
| Phosphorus | ↓ Declining | +1.5 µg/L/yr | 2 |
County Ranking
Ranked #1 of 11 lakes in Langlade County
Nearby Lakes in Langlade County
Frequently asked questions about Perch Lake
What is the water quality grade for Perch Lake?
- Perch Lake in Langlade County, Wisconsin has a water quality grade of B (Good). 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?
- Good for swimming, clear water with low algae levels. Perch Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
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.
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.
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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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated 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