Round Lake
Oconto County, Wisconsin31 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Round Lake. Here is what has been measured.
- Oligotrophic
- 31 ft max depth
- Public access
- Limited data
Round Lake in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 16.8 ft visibility. Phosphorus: 13.8 µg/L. Maximum depth: 31 ft. Surface area: 31 acres.
Wisconsin DNR lists Panfish as common on Round Lake. DNR survey details →
Round Lake is a 31-acre cold, clear oligotrophic lake in Oconto County, Wisconsin with a maximum depth of 31 feet. The lake supports 1 documented fish species including Panfish. Public access is available with 1 public boat landing. Compared to the 38 other monitored lakes in Oconto County, Round Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2021-10-28. Methodology: how these readings are compared.
What Round Lake is good for
From access and monitoring records, not editorial picks.
- Clear water16.8 ft of visibility
- Boat launch1 documented ramp
- Deep water31 ft surveyed max depth
Swimming conditions
Readings onlyLimited 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 Round 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.
Water quality measurements for Round Lake
These are the measurements Wisconsin DNR publishes for Round 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 16.8 ft down. Phosphorus 13.8 µg/L. TSI 39.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 16.8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 13.8µg/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. | 39 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Round Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as common on Round Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Round Lake’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. 1 station on file (most recent sample 2022).
Fish Species (DNR-rated)
Lake Details
Max depth
31 ft
Surface area
31 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Round 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 Round Lake
Compare lakeside cabins, hotels, and vacation rentals near Round Lake 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 Round Lake
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 Round Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fish Species
Click a species to see every lake where it is documented.
Fishing Round 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.
Water Quality Trend: Stable
Based on 7 years of monitoring (2020–2026).
Water clarity
Stable7 years
Phosphorus
Stable-0.21 µg/L/yr7 years
Nearby Lakes in Oconto County
Frequently asked questions about Round Lake
Where is Round Lake?
- Round Lake 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 Round Lake?
- Round Lake in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 16.8 ft visibility. Phosphorus: 13.8 µg/L. Maximum depth: 31 ft. Surface area: 31 acres.
Is Round Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Round Lake?
- Round Lake has a maximum depth of 31 feet. The lake covers 31 acres.
What fish are in Round Lake?
- Fish species found in Round Lake include Panfish. Round Lake is located in Oconto County, Wisconsin.
What did the DNR fisheries survey find at Round Lake?
- Wisconsin DNR lists Panfish as common on Round Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Round Lake’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.
Are there boat ramps on Round Lake?
- Round Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Round Lake. Public access is listed as yes.
Can I fish at Round Lake?
- Round 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.
Explore Round Lake across LakeQuality
Fish species and the cleanest lakes across Wisconsin
Fish species and best lakes in Oconto County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its readings
Wisconsin's cleanest lakes, ranked on agency measurements
More lakes in Wisconsin
State Parks Near Round Lake
Other Lakes in Wisconsin
Oligotrophic Lakes in Wisconsin
Where this data comes from
14 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX14 samples · 2020–2021
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
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
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory