L St Germain Lake
Vilas County, Wisconsin972 acresView mapDirections
No nutrient or algae sampling on record from Wisconsin DNR for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- Curly-Leaf Pondweed
- 53 ft max depth
- Public access
- Limited data
Ask about L St Germain Lake
Answers come straight from the public measurements and survey records on this page.
L St Germain Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 53 ft. Surface area: 972 acres.
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L St Germain Lake is a 972-acre lake in Vilas County, Wisconsin with a maximum depth of 53 feet. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2020-01-14. Grade methodology: LakeQuality methodology.
What L St Germain Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing6 species recorded
- Deep water53 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. L St Germain Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether L St 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 L St Germain Lake
These are the measurements Wisconsin DNR publishes for L St 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.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 53 ft |
| Surface Area | 972 acres |
| Public Access | Yes |
Recreation & Access
- Wisconsin River - Hwy OPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every lake where it is documented.
Fishing L St Germain 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.
EPA Impairment Status
L St 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
Source: EPA ATTAINS assessment unit WI8128746 · Official waterbody report · Matched by proximity (2.55 km)
Nearby Lakes in Vilas County
Frequently asked questions about L St Germain Lake
Where is L St Germain Lake?
- L St 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 L St Germain Lake?
- L St Germain Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 53 ft. Surface area: 972 acres.
Is L St Germain Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. L St 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 L St Germain Lake?
- L St Germain Lake has a maximum depth of 53 feet. The lake covers 972 acres.
What fish are in L St Germain Lake?
- Fish species found in L St Germain Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. L St Germain Lake is located in Vilas County, Wisconsin.
Are there boat ramps on L St Germain Lake?
- L St Germain Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Wisconsin River - Hwy O. Public access is listed as yes.
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Where this data comes from
2 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS Wisconsin Water Science Center
USGS-WI2 samples · 2020
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
Impairment status from EPA ATTAINS 303(d) database
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory