Trout Bog Lake
Vilas County, Wisconsin2 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Trout Bog Lake. Here is what has been measured.
- Mesotrophic
- 24 ft max depth
- Limited data
Trout Bog Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Phosphorus: 16.5 µg/L. Maximum depth: 24 ft. Surface area: 2 acres.
Trout Bog Lake is a 2-acre mesotrophic lake in Vilas County, Wisconsin with a maximum depth of 24 feet. Overall water quality is improving over recent sampling years. Compared to the 102 other monitored lakes in Vilas County, Trout Bog Lake ranks #80 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-05-14. Methodology: how these readings are compared.
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 Trout Bog 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 Trout Bog Lake
These are the measurements Wisconsin DNR publishes for Trout Bog 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. Phosphorus 16.5 µg/L. TSI 45.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 16.5µg/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. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Trout Bog Lake
Answers come straight from the public measurements and survey records on this page.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2025).
Lake Details
Max depth
24 ft
Surface area
2 acres
Lake Size & Watershed
Watershed (drainage) area
38 sq mi
HydroLAKES / HydroSHEDS
Shoreline
18 mi
HydroLAKES / HydroSHEDS
Elevation
1,608 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
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Fishing Trout Bog Lake
Water quality readings over time
3 seasons of samples on record (2020–2022). Calling a direction takes at least 4 years of the same measurement.
Phosphorus
Improving-1.25 µg/L/yr3 years
Nearby Lakes in Vilas County
Frequently asked questions about Trout Bog Lake
Where is Trout Bog Lake?
- Trout Bog 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 Trout Bog Lake?
- Trout Bog Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Phosphorus: 16.5 µg/L. Maximum depth: 24 ft. Surface area: 2 acres.
Is Trout Bog Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Trout Bog Lake?
- Trout Bog Lake has a maximum depth of 24 feet. The lake covers 2 acres.
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Where this data comes from
15 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX15 samples · 2020–2026
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes