Where is Hasbrook Lake?

Hasbrook 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 temperature of Hasbrook Lake?

Hasbrook Lake typically sits around 70°F at the surface in September, from 8 EPA Water Quality Portal field readings (2025–2025). That is a typical value for the month, not a live reading.

How deep is Hasbrook Lake?

Hasbrook Lake has a maximum depth of 50 feet. The lake covers 307 acres.

Are there boat ramps on Hasbrook Lake?

Hasbrook Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Hasbrook Lake. Public access is listed as yes.

Can I fish at Hasbrook Lake?

Hasbrook 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.

Hasbrook Lake

Oneida County, Wisconsin307 acresView map Directions

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

Clarity

21 ft

Clearer than most

Secchi · sampled 2025

Phosphorus

10.3 µg/L

Less phosphorus than most

Measured by Wisconsin DNR

Water temp

~70°F

Typical for Sep · EPA WQP

Max depth

50 ft

Bathymetric survey

Area

307 acres

Surface area

Type

Oligotrophic

Trophic class

Oligotrophic
2 aquatic invasives
50 ft max depth
Public access

See the measurements Directions Where to stay

Hasbrook Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 21 ft visibility. Phosphorus: 10.3 µg/L. Maximum depth: 50 ft. Surface area: 307 acres.

Wisconsin DNR lists Panfish as common on Hasbrook Lake. DNR survey details →

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Hasbrook Lake is a 307-acre cold, clear oligotrophic lake in Oneida County, Wisconsin with a maximum depth of 50 feet. Overall water quality is improving over recent sampling years. The lake supports 5 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, Hasbrook Lake ranks #23 for water quality.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-08-31. Methodology: how these readings are compared.

What Hasbrook Lake is good for

From access and monitoring records, not editorial picks.

Clear water21 ft of visibility
Boat launch1 documented ramp
Fishing5 species recorded
Deep water50 ft surveyed max depth

Swimming conditions

Readings only

Low 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 Hasbrook 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 Minocqua →

Get alerts for Hasbrook Lake →

Water quality measurements for Hasbrook Lake

These are the measurements Wisconsin DNR publishes for Hasbrook 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 21 ft down. Phosphorus 10.3 µg/L. TSI 36.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	21ft	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	10.3µg/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.	36	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Low nutrients, clear water. No reading is a swimming clearance.

Ask about Hasbrook Lake

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

Water Temperature

Hasbrook Lake typically sits around 70°F at the surface in September. Summer average is about 73°F. Usually warmest in Jul (about 78°F) and coldest in Aug (about 70°F). These are typical values by month — not a live reading.

Jan

Feb

Mar

Apr

May

72°

Jun

78°

Jul

70°

Aug

70°

Sep

Oct

Nov

Dec

Column height runs from this lake’s coldest month (70°F) to its warmest (78°F).

Typical surface water temperature by month, from 8 field readings (2025–2025) via the EPA Water Quality Portal. See the full Hasbrook Lake water temperature breakdown →

DNR fisheries survey

Wisconsin DNR lists Panfish as common on Hasbrook Lake.

A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Hasbrook Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. 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 1990. 1 station on file (most recent sample 2025).

DNR Assessment

Excellent · Deep Seepage lake

Trophic State Index 33 (oligotrophic) · 5-year average

Fish Species (DNR-rated)

Panfish(Common)Smallmouth Bass(Common)Walleye(Common)Musky(Present)Largemouth Bass(Present)

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

Lake Details

Max depth

50 ft

Surface area

307 acres

Public access

Yes

Listed by Wisconsin DNR

Lake Size & Watershed

Watershed (drainage) area

11 sq mi

HydroLAKES / HydroSHEDS

Shoreline

3.9 mi

HydroLAKES / HydroSHEDS

Elevation

1,591 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).

Recreation & Access

Boat Landings

Yes

Public Access

Hasbrook 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 Hasbrook Lake

Compare lakeside cabins, hotels, and vacation rentals near Hasbrook 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 Hasbrook 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 Hasbrook Lake’s readings

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Fish Species

Musky Panfish Largemouth Bass Smallmouth Bass Walleye

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

Fishing Hasbrook 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.

Chinese Mystery SnailEurasian Water-MilfoilPurple LoosestrifeRusty Crayfish

Water Quality Trend: Improving

Based on 6 years of monitoring (2020–2025).

Water clarity
Stable
6 years
Phosphorus
Improving
-0.67 µg/L/yr5 years

See year-by-year chart →

Nearby Lakes in Oneida County

Sureshot Lake14.5 ft clear—View →Cunard Lake12 ft clear—View →Gilmore Lake8.5 ft clear—View →Sweeney Lake5.2 ft clear—View →Dorothy Lake17 ft clear—View →Zottle Lake—View →

Frequently asked questions about Hasbrook Lake

Where is Hasbrook Lake?: Hasbrook 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 Hasbrook Lake?: Hasbrook Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 21 ft visibility. Phosphorus: 10.3 µg/L. Maximum depth: 50 ft. Surface area: 307 acres.
Is Hasbrook 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 Hasbrook Lake?: Hasbrook Lake typically sits around 70°F at the surface in September, from 8 EPA Water Quality Portal field readings (2025–2025). That is a typical value for the month, not a live reading.
How deep is Hasbrook Lake?: Hasbrook Lake has a maximum depth of 50 feet. The lake covers 307 acres.
What fish are in Hasbrook Lake?: Fish species found in Hasbrook Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Walleye. Hasbrook Lake is located in Oneida County, Wisconsin.
What did the DNR fisheries survey find at Hasbrook Lake?: Wisconsin DNR lists Panfish as common on Hasbrook Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Hasbrook Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Hasbrook Lake?: Hasbrook Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Hasbrook Lake. Public access is listed as yes.
Can I fish at Hasbrook Lake?: Hasbrook 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.

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Where this data comes from

127 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

Wisconsin Department of Natural ResourcesWIDNR_WQX127 samples · 2020–2025

Analytical methods

Phosphorus by Colorimetry

Monitoring station identifiers (1)

WIDNR_WQX-443386

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

Lake size & watershed from HydroLAKES (HydroSHEDS)

Fish and recreation data from Wisconsin DNR Lakes

Named boat-access points from the USGS National Boat Ramps inventory