Reservoir Pond
Reservoir Pond in Oconto County, Wisconsin has a water quality grade of B (Good). 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 →
- Clarity
- 9.5 ft
- Typical in July
- 76°F
- Max depth
- 16 ft
- Area
- 413 acres
- Type
- Mesotrophic
- Trend
- → Stable
- Public access
- Yes
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Reservoir Pond is a 413-acre mesotrophic lake in Oconto County, Wisconsin with a maximum depth of 16 feet. Water quality is graded B based on 1 sampling years through 2026. 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. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Moderate clarity, visible to about 9.5 ft. Phosphorus level: 21.5 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.5 ft | Not graded |
| Phosphorus | 21.5 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay 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.
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Water Temperature
Reservoir Pond typically sits around 76°F at the surface in July. 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.
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)
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 ↗
Wisconsin DNR rates Panfish as abundant on Reservoir Pond.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Reservoir Pond B from EPA Water Quality Portal chemistry, 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)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 16 ft |
| Surface Area | 413 acres |
| Public Access | Yes |
Recreation & Access
- Reservoir PondPublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fish Species
Click a species to see every graded 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.
Water Quality Trend: → Stable
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.8 m/yr | 7 |
| Phosphorus | ↑ Improving | -1.05 µg/L/yr | 5 |
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)
County Ranking
Ranked #16 of 39 lakes in Oconto County
Nearby Lakes in Oconto County
Frequently asked questions about Reservoir Pond
Where is Reservoir Pond?
- Reservoir Pond is a lake in Oconto County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Reservoir Pond?
- Reservoir Pond in Oconto County, Wisconsin has a water quality grade of B (Good). 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?
- Good for swimming, clear water with low algae levels. Reservoir Pond has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Reservoir Pond?
- Reservoir Pond typically sits around 76°F at the surface in July, 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 a water-quality grade. LakeQuality grades Reservoir Pond B from EPA Water Quality Portal chemistry, 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 Reservoir Pond. Public access is listed as yes.
Explore Reservoir Pond across LakeGrade
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Moderate nutrients, good water quality
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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 Resources
WIDNR_WQX33 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (2)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated 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