Where is Reservoir Pond?

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

What is the water temperature of Reservoir Pond?

Reservoir Pond typically sits around 48°F at the surface in November, from 9 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.

How deep is Reservoir Pond?

Reservoir Pond has a maximum depth of 16 feet. The lake covers 413 acres.

What fish are in Reservoir Pond?

Fish species found in Reservoir Pond include Panfish, Largemouth Bass, Northern Pike. Reservoir Pond is located in Oconto County, Wisconsin.

Does Reservoir Pond have blue-green algae?

There is no recent EPA CyAN cyanobacteria estimate for Reservoir Pond (clouds, ice, or an off-season gap). The most recent reading was high (457,088 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.

Are there boat ramps on Reservoir Pond?

Reservoir Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Townsend Flowage. Public access is listed as yes.

Can I fish at Reservoir Pond?

Reservoir Pond 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.

Reservoir Pond

Oconto County, Wisconsin413 acresView map Directions

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

Clarity

9.5 ft

Typical for Wisconsin

Secchi · sampled 2026

Phosphorus

21.5 µg/L

Typical for Wisconsin

Measured by Wisconsin DNR

Water temp

~48°F

Typical for Nov · EPA WQP

Max depth

16 ft

Bathymetric survey

Area

413 acres

Surface area

Type

Mesotrophic

Trophic class

Mesotrophic
16 ft max depth
Public access

See the measurements Directions Where to stay

Reservoir Pond in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 9.5 ft visibility. Phosphorus: 21.5 µg/L. Maximum depth: 16 ft. Surface area: 413 acres.

Wisconsin DNR rates Panfish as abundant on Reservoir Pond. DNR survey details →

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Reservoir Pond is a 413-acre mesotrophic lake in Oconto County, Wisconsin with a maximum depth of 16 feet. Water clarity is declining over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing. Compared to the 38 other monitored lakes in Oconto County, Reservoir Pond ranks #16 for water quality.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-19. Methodology: how these readings are compared.

Reservoir Pond covers about 410 acres in Oconto County. It has one public boat landing. If you are planning to stay, you can search lake houses and cabins around Reservoir Pond on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.

What Reservoir Pond is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Fishing3 species recorded

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 Reservoir Pond 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 Rhinelander →

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Water quality measurements for Reservoir Pond

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

Moderate clarity, visible to about 9.5 ft. Phosphorus 21.5 µg/L. TSI 47.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	9.5ft	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	21.5µg/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.	47	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Reservoir Pond

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

Water Temperature

Reservoir Pond typically sits around 48°F at the surface in November. Summer average is about 75°F. Usually warmest in Jul (about 76°F) and coldest in Nov (about 48°F). These are typical values by month — not a live reading.

Jan

Feb

Mar

61°

Apr

May

74°

Jun

76°

Jul

Aug

Sep

Oct

48°

Nov

Dec

Column height runs from this lake’s coldest month (48°F) to its warmest (76°F).

Typical surface water temperature by month, from 9 field readings (2024–2025) via the EPA Water Quality Portal. See the full Reservoir Pond water temperature breakdown →

Blue-Green Algae (Cyanobacteria)

No current satellite reading

There’s no recent EPA CyAN cyanobacteria estimate for Reservoir Pond — clouds, ice, or an off-season gap in coverage. The most recent reading was high (457,088 cells/mL) on August 10, 2024.

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 Panfish as abundant on Reservoir Pond.

A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Reservoir Pond’s water-quality measurements separately, and the water-quality trend over 7 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 2003. 3 stations on file (most recent sample 2025).

Fish Species (DNR-rated)

Panfish(Abundant)Largemouth Bass(Common)Northern Pike(Common)

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

Lake Details

Max depth

16 ft

Surface area

413 acres

Public access

Yes

Listed by Wisconsin DNR

Recreation & Access

Boat Landings

Yes

Public Access

Townsend FlowagePublic

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

Stays via Stay22

Stays near Reservoir Pond

Compare lakeside cabins, hotels, and vacation rentals near Reservoir Pond in Oconto 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 Reservoir Pond

Prices for Oct 9–11, 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 Reservoir Pond’s readings

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Fish Species

Panfish Largemouth Bass Northern Pike

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

Fishing Reservoir Pond

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 SnailChinese Mystery SnailEurasian Water-Milfoil

Water Quality Trend: Stable

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

Water clarity
Worsening
7 years
Phosphorus
Improving
-1.05 µg/L/yr5 years

See year-by-year chart →

Reservoir Info (USACE NID)

Reservoir Pond is a man-made reservoir impounded by the Reservoir (completed 1877), built primarily for recreation on the MCCASLIN BROOK; gravity-type dam, 15 ft tall and 212 ft long.

Surface area: 618 ac
Normal storage: 2,200 ac-ft
Max storage: 3,500 ac-ft
Drainage area: 18.8 sq mi
Hazard class: High
Owner: Oconto County

Source: USACE National Inventory of Dams, NID ID WI00163 · Operator website · Matched by proximity (0.57 km)

Nearby Lakes in Oconto County

Explosion Lake17 ft clear · Oligotrophic—View →Little Horn Lake13.3 ft clear · Mesotrophic—View →Horn Lake8.8 ft clear · Mesotrophic—View →Upper Wapato Lake—View →Lower Wapato Lake—View →Bass Lake16.8 ft clear · Oligotrophic—View →

Frequently asked questions about Reservoir Pond

Where is Reservoir Pond?: Reservoir Pond is a lake in Oconto County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Reservoir Pond?: Reservoir Pond in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 9.5 ft visibility. Phosphorus: 21.5 µg/L. Maximum depth: 16 ft. Surface area: 413 acres.
Is Reservoir Pond 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 Reservoir Pond?: Reservoir Pond typically sits around 48°F at the surface in November, from 9 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Reservoir Pond?: Reservoir Pond has a maximum depth of 16 feet. The lake covers 413 acres.
What fish are in Reservoir Pond?: Fish species found in Reservoir Pond include Panfish, Largemouth Bass, Northern Pike. Reservoir Pond is located in Oconto County, Wisconsin.
What did the DNR fisheries survey find at Reservoir Pond?: Wisconsin DNR rates Panfish as abundant on Reservoir Pond. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Reservoir Pond’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Does Reservoir Pond have blue-green algae?: There is no recent EPA CyAN cyanobacteria estimate for Reservoir Pond (clouds, ice, or an off-season gap). The most recent reading was high (457,088 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.
Are there boat ramps on Reservoir Pond?: Reservoir Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Townsend Flowage. Public access is listed as yes.
Can I fish at Reservoir Pond?: Reservoir Pond 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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State Parks Near Reservoir Pond

Governor Thompson State Park

State Park · 19 mi

Other Lakes in Wisconsin

Mary Lake

Langlade County · 7 ft

Jessie Lake

Langlade County · 6.5 ft

Sawyer Lake

Langlade County · 10 ft

Windfall Lake

Forest County · 10 ft

Roberts Lake

Forest County · 11.7 ft

Bear Lake

Forest County · 5.6 ft

Mesotrophic Lakes in Wisconsin

Mary Lake Jessie Lake Sawyer Lake Windfall Lake

Compare Reservoir Pond With Nearby Lakes

Reservoir Pond vs Archibald Lake

Oconto County · 17.8 ft

Where this data comes from

33 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 ResourcesWIDNR_WQX33 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.