North Lake
Walworth County, Wisconsin255 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for North Lake. Here is what has been measured.
- 2 aquatic invasives
- 11 ft max depth
- Public access
- Limited data
North Lake in Walworth County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 3.5 ft visibility. Maximum depth: 11 ft. Surface area: 255 acres.
Wisconsin DNR rates Panfish as abundant on North Lake. DNR survey details →
North Lake is a 255-acre lake in Walworth County, Wisconsin with a maximum depth of 11 feet. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-07-19. Methodology: how these readings are compared.
What North Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing3 species recorded
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether North 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 North Lake
These are the measurements Wisconsin DNR publishes for North Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 3.5 ft. TSI 59.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading 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. | 59 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about North Lake
Answers come straight from the public measurements and survey records on this page.
→ North Lake water level: the live USGS gauge reading
Blue-Green Algae (Cyanobacteria)
There’s no recent EPA CyAN cyanobacteria estimate for North Lake — clouds, ice, or an off-season gap in coverage. The most recent reading was moderate (60,814 cells/mL) on April 11, 2026.
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 North Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows North Lake’s water-quality measurements separately. 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
11 ft
Surface area
255 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
10 sq mi
HydroLAKES / HydroSHEDS
Shoreline
4 mi
HydroLAKES / HydroSHEDS
Elevation
902 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- North 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 North Lake
Compare lakeside cabins, hotels, and vacation rentals near North Lake in Walworth 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 North Lake
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Follow North Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing North 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.
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of North Lake under Clean Water Act (NPDES) discharge permits.
- Wi Dot East Troy Rest Area 36East Troy · 3.1 mi away · NPDES WI0030856
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 Walworth County
Frequently asked questions about North Lake
Where is North Lake?
- North Lake is a lake in Walworth County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of North Lake?
- North Lake in Walworth County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 3.5 ft visibility. Maximum depth: 11 ft. Surface area: 255 acres.
Is North Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is North Lake?
- North Lake has a maximum depth of 11 feet. The lake covers 255 acres.
What fish are in North Lake?
- Fish species found in North Lake include Panfish, Largemouth Bass, Northern Pike. North Lake is located in Walworth County, Wisconsin.
What did the DNR fisheries survey find at North Lake?
- Wisconsin DNR rates Panfish as abundant on North Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows North Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
Does North Lake have blue-green algae?
- There is no recent EPA CyAN cyanobacteria estimate for North Lake (clouds, ice, or an off-season gap). The most recent reading was moderate (60,814 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.
Are there boat ramps on North Lake?
- North Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include North Lake. Public access is listed as yes.
Can I fish at North Lake?
- North 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 North Lake across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX1 sample · 2022
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)
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