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

Is Long Lake safe to swim in?

Based on E. coli testing, Long Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 35 samples across 3 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Long Lake is safe to swim in today is a call for Wisconsin's water agency and the county health department; check their current beach advisories before you swim.

How deep is Long Lake?

Long Lake has a maximum depth of 101 feet. The lake covers 936 acres.

Does Long Lake have blue-green algae?

There is no recent EPA CyAN cyanobacteria estimate for Long Lake (clouds, ice, or an off-season gap). The most recent reading was low (12,942 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.

Are there boat ramps on Long Lake?

Long Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include 290th Avenue, Morris-Erickson County Park, Triple Lakes. Public access is listed as yes.

Can I fish at Long Lake?

Long Lake has 3 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.

Long Lake

Chippewa County, Wisconsin936 acresView map Directions

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

Clarity

13.1 ft

Clearer than most

Secchi · sampled 2026

Phosphorus

12.4 µg/L

Less phosphorus than most

Measured by Wisconsin DNR

Max depth

101 ft

Bathymetric survey

Area

936 acres

Surface area

Type

Mesotrophic

Trophic class

Trend

Improving

7 years of samples

Mesotrophic
Rusty Crayfish
101 ft max depth
Public access

See the measurements Directions Where to stay

Long Lake in Chippewa County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 13.1 ft visibility. Phosphorus: 12.4 µg/L. Maximum depth: 101 ft. Surface area: 936 acres.

Wisconsin DNR rates Walleye as abundant on Long Lake. DNR survey details →

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Long Lake is a 936-acre mesotrophic lake in Chippewa County, Wisconsin with a maximum depth of 101 feet. Overall water quality is improving over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 3 public boat landings. Compared to the 6 other monitored lakes in Chippewa County, Long Lake ranks #3 for water quality.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-07-07. Methodology: how these readings are compared.

What Long Lake is good for

From access and monitoring records, not editorial picks.

Clear water13.1 ft of visibility
Boat launch3 documented ramps
Fishing6 species recorded
Deep water101 ft surveyed max depth

Swimming conditions

Readings only

Bacteria tested: low

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.

Bacteria testing record

from E. coli testing · 35 samples, 3 seasons

Based on E. coli testing, Long Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 35 samples across 3 seasons.

This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Wisconsin’s current beach and health-department advisories before swimming.

Whether Long 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 Eau Claire →

Get alerts for Long Lake →

Water quality measurements for Long Lake

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

Good clarity, visible to about 13.1 ft. Phosphorus 12.4 µg/L. TSI 40.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	13.1ft	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	12.4µg/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.	40	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Long Lake

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

Blue-Green Algae (Cyanobacteria)

No current satellite reading

There’s no recent EPA CyAN cyanobacteria estimate for Long Lake — clouds, ice, or an off-season gap in coverage. The most recent reading was low (12,942 cells/mL) on July 7, 2026.

Blue-green algae can appear and clear within days, so check your state’s current advisory before swimming. EPA CyAN ↗

DNR fisheries survey

Wisconsin DNR rates Walleye as abundant on Long Lake.

A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Long Lake’s water-quality measurements separately, and the water-quality trend over 7 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 1989. 5 stations on file (most recent sample 2026).

DNR Assessment

Reported

Trophic State Index 44 (mesotrophic) · 5-year average

Fish Species (DNR-rated)

Walleye(Abundant)Musky(Common)Panfish(Common)Smallmouth Bass(Common)Northern Pike(Common)Largemouth Bass(Present)

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

DNR Reports & Resources

Wisconsin DNR Fisheries scientists publish multi-year survey reports for Long Lake covering fish populations, stocking, water quality, and management. 2 reports on file.

These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).

2025
Long Lake spring shocking and netting survey, 2025
Spring Shocking Survey · WI DNR · 2025 (PDF)
2021
Long Lake spring survey, 2021
Fisheries Survey · WI DNR · 2021 (PDF)

Lake Details

Max depth

101 ft

Surface area

936 acres

Public access

Yes

Listed by Wisconsin DNR

Lake Size & Watershed

Watershed (drainage) area

14 sq mi

HydroLAKES / HydroSHEDS

Shoreline

12.1 mi

HydroLAKES / HydroSHEDS

Elevation

1,066 ft

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

Recreation & Access

Boat Landings

Yes

Public Access

290th AvenuePublic
Morris-Erickson County ParkPublic
Triple LakesPublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

Stays via Stay22

Stays near Long Lake

Compare lakeside cabins, hotels, and vacation rentals near Long Lake in Chippewa 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 Long 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 Long Lake’s readings

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Fish Species

Musky Panfish Largemouth Bass Smallmouth Bass Northern Pike Walleye

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

Fishing Long 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.

Banded Mystery SnailRusty Crayfish

Water Quality Trend: Improving

Based on 7 years of monitoring (2020–2026).

Water clarity
Improving
7 years
Phosphorus
Improving
-0.96 µg/L/yr7 years

See year-by-year chart →

Nearby Lakes in Chippewa County

Hodge Lake—View →Two Island Lake15.3 ft clear · Mesotrophic—View →Larrabee Lake—View →North Shattuck Lake—View →South Shattuck Lake—View →Salisbury Lake—View →

Frequently asked questions about Long Lake

Where is Long Lake?: Long Lake is a lake in Chippewa County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Long Lake?: Long Lake in Chippewa County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 13.1 ft visibility. Phosphorus: 12.4 µg/L. Maximum depth: 101 ft. Surface area: 936 acres.
Is Long Lake safe to swim in?: Based on E. coli testing, Long Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 35 samples across 3 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Long Lake is safe to swim in today is a call for Wisconsin's water agency and the county health department; check their current beach advisories before you swim.
How deep is Long Lake?: Long Lake has a maximum depth of 101 feet. The lake covers 936 acres.
What fish are in Long Lake?: Fish species found in Long Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Long Lake is located in Chippewa County, Wisconsin.
What did the DNR fisheries survey find at Long Lake?: Wisconsin DNR rates Walleye as abundant on Long Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Long Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Does Long Lake have blue-green algae?: There is no recent EPA CyAN cyanobacteria estimate for Long Lake (clouds, ice, or an off-season gap). The most recent reading was low (12,942 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.
Are there boat ramps on Long Lake?: Long Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include 290th Avenue, Morris-Erickson County Park, Triple Lakes. Public access is listed as yes.
Can I fish at Long Lake?: Long Lake has 3 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.

Explore Long Lake across LakeQuality

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Official ratings and named-lake measurements

State Parks Near Long Lake

Brunet Island State Park

State Park · 12.8 mi

Lake Wissota State Park

State Park · 20 mi

Other Lakes in Wisconsin

Clear Lake

Rusk County · 13.7 ft

Island Lake

Rusk County · 7.7 ft

Bass Lake

Barron County · 10 ft

Red Cedar Lake

Barron County · 10.1 ft

Balsam Lake

Washburn County · 8.8 ft

Little Sissabagama Lake

Sawyer County · 12.2 ft

Mesotrophic Lakes in Wisconsin

Island Lake Pulaski Lake Bass Lake Red Cedar Lake

Compare Long Lake With Nearby Lakes

Long Lake vs Lake Wissota

Chippewa County · 3.5 ft

Long Lake vs Holcombe Flowage Lake

Chippewa County · 3.7 ft

Where this data comes from

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

Collected and reported by

Wisconsin Department of Natural ResourcesWIDNR_WQX60 samples · 2020–2026

Analytical methods

Phosphorus by Colorimetry

Monitoring station identifiers (1)

WIDNR_WQX-093123

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