Tea Lake is a lake in Ashland County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.

How deep is Tea Lake?

Tea Lake has a maximum depth of 48 feet. The lake covers 50 acres.

What fish are in Tea Lake?

Fish species found in Tea Lake include Panfish, Largemouth Bass, Northern Pike, Walleye. Tea Lake is located in Ashland County, Wisconsin.

Can I fish at Tea Lake?

Public access to Tea 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.

Tea Lake

Ashland County, Wisconsin50 acresView map Directions

Wisconsin DNR publishes the water-quality measurements for Tea Lake. Here is what has been measured.

Phosphorus

18.8 µg/L

Typical for Wisconsin

Measured by Wisconsin DNR

Max depth

48 ft

Bathymetric survey

Area

50 acres

Surface area

Type

Mesotrophic

Trophic class

Mesotrophic
48 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Tea Lake in Ashland County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Phosphorus: 18.8 µg/L. Maximum depth: 48 ft. Surface area: 50 acres.

Wisconsin DNR lists Walleye as common on Tea Lake. DNR survey details →

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Tea Lake is a 50-acre mesotrophic lake in Ashland County, Wisconsin with a maximum depth of 48 feet. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available. Compared to the 2 other monitored lakes in Ashland County, Tea Lake ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2020-08-24. Methodology: how these readings are compared.

What Tea Lake is good for

From access and monitoring records, not editorial picks.

Fishing4 species recorded
Deep water48 ft surveyed max depth

Swimming conditions

Readings only

Limited 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 Tea 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.

Compare swimming lakes near Hayward →

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Water quality measurements for Tea Lake

These are the measurements Wisconsin DNR publishes for Tea Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. Phosphorus 18.8 µg/L. TSI 46.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)		No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	18.8µg/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.	46	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Tea Lake

Answers come straight from the public measurements and survey records on this page.

DNR fisheries survey

Wisconsin DNR lists Walleye as common on Tea Lake.

A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Tea Lake’s water-quality measurements separately. 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 2020).

Fish Species (DNR-rated)

Walleye(Common)Panfish(Present)Largemouth Bass(Present)Northern Pike(Present)

Contour map (PDF) →Full WI DNR LakePage →Water quality stations →

Lake Details

Max depth

48 ft

Surface area

50 acres

Public access

Yes

Listed by Wisconsin DNR

Stays via Stay22

Stays near Tea Lake

Compare lakeside cabins, hotels, and vacation rentals near Tea Lake in Ashland 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 Tea Lake

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Fish Species

Panfish Largemouth Bass Northern Pike Walleye

Click a species to see every lake where it is documented.

Fishing Tea Lake

Nearby Lakes in Ashland County

Beaver Lake—View →Moquah Lake—View →Lake Three—View →Mineral Lake4.1 ft clear · Eutrophic—View →Spider Lake—View →Beaverdam Lake—View →

Frequently asked questions about Tea Lake

Where is Tea Lake?: Tea Lake is a lake in Ashland County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Tea Lake?: Tea Lake in Ashland County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Phosphorus: 18.8 µg/L. Maximum depth: 48 ft. Surface area: 50 acres.
Is Tea Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Tea Lake?: Tea Lake has a maximum depth of 48 feet. The lake covers 50 acres.
What fish are in Tea Lake?: Fish species found in Tea Lake include Panfish, Largemouth Bass, Northern Pike, Walleye. Tea Lake is located in Ashland County, Wisconsin.
What did the DNR fisheries survey find at Tea Lake?: Wisconsin DNR lists Walleye as common on Tea Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Tea Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Tea Lake?: Public access to Tea 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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State Parks Near Tea Lake

Copper Falls State Park

State Park · 13.9 mi

Other Lakes in Wisconsin

Taylor Lake

Bayfield County · 6 ft

Diamond Lake

Bayfield County · 13 ft

Teal Lake

Sawyer County · 6.6 ft

Lost Land Lake

Sawyer County · 10 ft

Tahkodah Lake

Bayfield County · 9.7 ft

Lake Owen

Bayfield County · 24.6 ft

Mesotrophic Lakes in Wisconsin

Taylor Lake Twin Lake North Teal Lake Lost Land Lake

Where this data comes from

4 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

Wisconsin Department of Natural ResourcesWIDNR_WQX4 samples · 2020

Analytical methods

Phosphorus by Colorimetry

Monitoring station identifiers (1)

WIDNR_WQX-10021253

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.