Townline Lake
Oneida County, Wisconsin142 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Townline Lake. Here is what has been measured.
- Eutrophic
- Rusty Crayfish
- 19 ft max depth
- Public access
- Limited data
Townline Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 6.4 ft visibility. Phosphorus: 29.2 µg/L. Maximum depth: 19 ft. Surface area: 142 acres.
Wisconsin DNR lists Panfish as common on Townline Lake. DNR survey details →
Townline Lake is a 142-acre productive, nutrient-rich eutrophic lake in Oneida County, Wisconsin with a maximum depth of 19 feet. Water clarity is improving over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 1 public boat landing. Compared to the 66 other monitored lakes in Oneida County, Townline Lake ranks #53 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-02-24. Methodology: how these readings are compared.
Townline Lake covers about 140 acres in Oneida County. It has one public boat landing. For a place on the water, look through cabin and lake-house rentals near Townline Lake on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Townline Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing6 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 Townline 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 Townline Lake
These are the measurements Wisconsin DNR publishes for Townline Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 6.4 ft. Phosphorus 29.2 µg/L. TSI 52.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6.4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 29.2µg/L | Fair 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. | 52 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Townline Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Townline Lake typically sits around 39°F at the surface in November. Summer average is about 66°F. Usually warmest in Jun (about 67°F) and coldest in Feb (about 38°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (38°F) to its warmest (67°F).
Typical surface water temperature by month, from 14 field readings (2025–2026) via the EPA Water Quality Portal. See the full Townline Lake water temperature breakdown →
Wisconsin DNR lists Panfish as common on Townline Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Townline Lake’s water-quality measurements separately, and the water-quality trend over 6 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 1993. 2 stations on file (most recent sample 2026).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Townline Lake covering fish populations, stocking, water quality, and management. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2025Townline Lake spring shocking survey, 2025Spring Shocking Survey · WI DNR · 2025 (PDF)
Lake Details
Max depth
19 ft
Surface area
142 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Townline LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Townline Lake
Compare lakeside cabins, hotels, and vacation rentals near Townline Lake in Oneida 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.
Top-rated places to stay near Townline Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Follow Townline Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Townline 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 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Worsening+6.7 µg/L/yr2 years
Reservoir Info (USACE NID)
Townline Lake is a man-made reservoir impounded by the Maple Lake (completed 1941), built primarily for recreation on the OUTLET TO TOWN LINE LAKE; gravity-type dam, 12 ft tall and 85 ft long.
- Surface area
- 144 ac
- Normal storage
- 900 ac-ft
- Max storage
- 1,330 ac-ft
- Drainage area
- 1 sq mi
- Hazard class
- High
- Owner
- Town of Three Lakes
Source: USACE National Inventory of Dams, NID ID WI00282 · Operator website · Matched by proximity (0.99 km)
Nearby Lakes in Oneida County
Frequently asked questions about Townline Lake
Where is Townline Lake?
- Townline 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 Townline Lake?
- Townline Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 6.4 ft visibility. Phosphorus: 29.2 µg/L. Maximum depth: 19 ft. Surface area: 142 acres.
Is Townline 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 Townline Lake?
- Townline Lake typically sits around 39°F at the surface in November, from 14 EPA Water Quality Portal field readings (2025–2026). That is a typical value for the month, not a live reading.
How deep is Townline Lake?
- Townline Lake has a maximum depth of 19 feet. The lake covers 142 acres.
What fish are in Townline Lake?
- Fish species found in Townline Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Townline Lake is located in Oneida County, Wisconsin.
What did the DNR fisheries survey find at Townline Lake?
- Wisconsin DNR lists Panfish as common on Townline Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Townline Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Townline Lake?
- Townline Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Townline Lake. Public access is listed as yes.
Can I fish at Townline Lake?
- Townline Lake has 1 documented boat landing 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.
Explore Townline Lake across LakeQuality
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Where this data comes from
73 measurements from 2 monitoring stations, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX73 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (2)
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