Deep Hole Lake
Deep Hole Lake in Oneida County, Wisconsin has a water quality grade of B (Good). Water clarity: 4.3 ft visibility. Phosphorus: 21.3 µg/L.
- Clarity
- 4.3 ft
- Type
- Eutrophic
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Deep Hole Lake is a productive, nutrient-rich eutrophic lake in Oneida County, Wisconsin. Water quality is graded B based on 1 sampling years through 2025. Compared to the 66 other monitored lakes in Oneida County, Deep Hole Lake ranks #24 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-15. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Murky, only visible to about 4.3 ft. Phosphorus level: 21.3 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.3 ft | Not graded |
| Phosphorus | 21.3 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Deep Hole Lake
Compare lakeside cabins, hotels, and vacation rentals near Deep Hole Lake in Oneida 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.
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Fishing Deep Hole Lake
County Ranking
Ranked #24 of 67 lakes in Oneida County
Nearby Lakes in Oneida County
Frequently asked questions about Deep Hole Lake
Where is Deep Hole Lake?
- Deep Hole Lake is a lake in Oneida County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Deep Hole Lake?
- Deep Hole Lake in Oneida County, Wisconsin has a water quality grade of B (Good). Water clarity: 4.3 ft visibility. Phosphorus: 21.3 µg/L.
Is Deep Hole Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Deep Hole Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
Explore Deep Hole Lake across LakeQuality
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Where this data comes from
32 measurements from 2 monitoring stations, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX32 samples · 2024–2025
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (2)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.