Big Saint Germain Lake
Vilas County, Wisconsin1,625 acresView mapDirections
No nutrient or algae sampling on record from Wisconsin DNR for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- 42 ft max depth
- Public access
Big Saint Germain Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 42 ft. Surface area: 1625 acres.
Big Saint Germain Lake is a 1,625-acre lake in Vilas County, Wisconsin with a maximum depth of 42 feet (21-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water. Methodology: how these readings are compared.
What Big Saint Germain Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Deep water42 ft surveyed max depth
- Big water1,625 acres
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Big Saint Germain Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Big Saint Germain 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 Big Saint Germain Lake
These are the measurements Wisconsin DNR publishes for Big Saint Germain Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Big Saint Germain Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
42 ft
Average depth
21 ft
Surface area
1,625 acres
Shoreline
8.1 mi
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Big Saint Germain 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 Big Saint Germain Lake
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Fishing Big Saint Germain Lake
EPA Impairment Status
Big Saint Germain Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
Source: EPA ATTAINS assessment unit WI10007545 · Official waterbody report
Nearby Lakes in Vilas County
Frequently asked questions about Big Saint Germain Lake
Where is Big Saint Germain Lake?
- Big Saint Germain Lake is a lake in Vilas County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Big Saint Germain Lake?
- Big Saint Germain Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 42 ft. Surface area: 1625 acres.
Is Big Saint Germain Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Big Saint Germain Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Big Saint Germain Lake?
- Big Saint Germain Lake has a maximum depth of 42 feet and an average depth of 21 feet. The lake covers 1625 acres.
Are there boat ramps on Big Saint Germain Lake?
- Big Saint Germain Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Big Saint Germain Lake. Public access is listed as yes.
Can I fish at Big Saint Germain Lake?
- Big Saint Germain 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
Measurements for Big Saint Germain Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory