Finnegan Lake
Oconto County, Wisconsin25 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Finnegan Lake. Here is what has been measured.
- 38 ft max depth
- Public access
- Limited data
Finnegan Lake in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 10 ft visibility. Phosphorus: 15.3 µg/L. Maximum depth: 38 ft. Surface area: 25 acres.
Wisconsin DNR rates Panfish as abundant on Finnegan Lake. DNR survey details →
Finnegan Lake is a 25-acre lake in Oconto County, Wisconsin with a maximum depth of 38 feet. Overall water quality is improving over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Walleye. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2023-08-23. Methodology: how these readings are compared.
What Finnegan Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10 ft of visibility
- Boat launch1 documented ramp
- Fishing3 species recorded
- Deep water38 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Finnegan 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 Finnegan Lake
These are the measurements Wisconsin DNR publishes for Finnegan 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 10 ft. Phosphorus 15.3 µg/L. TSI 44.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 10ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 15.3µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| 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. | 44 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Finnegan Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR rates Panfish as abundant on Finnegan Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Finnegan Lake’s water-quality measurements separately, and the water-quality trend over 2 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. 5 stations on file (most recent sample 2023).
Fish Species (DNR-rated)
Lake Details
Max depth
38 ft
Surface area
25 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Finnegan LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Finnegan Lake
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Follow Finnegan Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Finnegan 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 readings over time
2 seasons of samples on record (2022–2023). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving2 years
Regulated Pollution Sources Nearby
4 EPA-permitted facilities operate within about 5 miles of Finnegan Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Gillett Wastewater Treatment FacilityGillett · 1.8 mi away · NPDES WI0022063Recent violation
- Seneca Foods Corporation GillettGillett · 1.5 mi away · NPDES WI0000345
- Horsens Homestead Farms LlcGreen Valley, Town Of · 2.9 mi away · NPDES WI0066494
- Blaser Farms IncGillett · 3.7 mi away · NPDES WI0064246
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Oconto County
Frequently asked questions about Finnegan Lake
Where is Finnegan Lake?
- Finnegan 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 Finnegan Lake?
- Finnegan Lake in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 10 ft visibility. Phosphorus: 15.3 µg/L. Maximum depth: 38 ft. Surface area: 25 acres.
Is Finnegan Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Finnegan Lake?
- Finnegan Lake has a maximum depth of 38 feet. The lake covers 25 acres.
What fish are in Finnegan Lake?
- Fish species found in Finnegan Lake include Panfish, Largemouth Bass, Walleye. Finnegan Lake is located in Oconto County, Wisconsin.
What did the DNR fisheries survey find at Finnegan Lake?
- Wisconsin DNR rates Panfish as abundant on Finnegan Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Finnegan Lake’s water-quality measurements separately, and the water-quality trend over 2 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Finnegan Lake?
- Finnegan Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Finnegan Lake. Public access is listed as yes.
Can I fish at Finnegan Lake?
- Finnegan 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
10 measurements from 1 monitoring station, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX10 samples · 2022–2023
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory