Clearwater Lake
Clearwater Lake in Oneida County, Wisconsin has a water quality grade of B (Good). Water clarity: 16.8 ft visibility. Phosphorus: 10 µg/L. Maximum depth: 48 ft. Surface area: 360 acres.
Wisconsin DNR lists Smallmouth Bass as common on Clearwater Lake. DNR survey details →
- Clarity
- 16.8 ft
- Typical in August
- 75°F
- Max depth
- 48 ft
- Area
- 360 acres
- Type
- Oligotrophic
- Trend
- ↑ Improving
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Clearwater Lake is a 360-acre cold, clear oligotrophic lake in Oneida County, Wisconsin with a maximum depth of 48 feet. Water quality is graded B based on 1 sampling years through 2025. Overall water quality is improving over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Compared to the 66 other monitored lakes in Oneida County, Clearwater Lake ranks #35 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-10-13. 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)
Crystal clear, you can see 16.8 ft down. Phosphorus level: 10 µg/L. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 16.8 ft | Not graded |
| Phosphorus | 10 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Clearwater Lake
Compare lakeside cabins, hotels, and vacation rentals near Clearwater 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.
Top-rated places to stay near Clearwater Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Water Temperature
Clearwater Lake typically sits around 75°F at the surface in August. Summer average is about 75°F. Usually warmest in Jul (about 78°F) and coldest in May (about 60°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 38 field readings (2024–2025) via the EPA Water Quality Portal. See the full Clearwater Lake water temperature breakdown →
Wisconsin DNR lists Smallmouth Bass as common on Clearwater Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Clearwater Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 4 years of monitoring is improving. 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. Monitored by volunteers since 2017. 2 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 48 ft |
| Surface Area | 360 acres |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Clearwater 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.
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.893 m/yr | 3 |
| Phosphorus | ↑ Improving | -0.7 µg/L/yr | 4 |
County Ranking
Ranked #35 of 67 lakes in Oneida County
Nearby Lakes in Oneida County
Frequently asked questions about Clearwater Lake
Where is Clearwater Lake?
- Clearwater 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 Clearwater Lake?
- Clearwater Lake in Oneida County, Wisconsin has a water quality grade of B (Good). Water clarity: 16.8 ft visibility. Phosphorus: 10 µg/L. Maximum depth: 48 ft. Surface area: 360 acres.
Is Clearwater Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Clearwater Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Clearwater Lake?
- Clearwater Lake typically sits around 75°F at the surface in August, from 38 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Clearwater Lake?
- Clearwater Lake has a maximum depth of 48 feet. The lake covers 360 acres.
What fish are in Clearwater Lake?
- Fish species found in Clearwater Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Clearwater Lake is located in Oneida County, Wisconsin.
What did the DNR fisheries survey find at Clearwater Lake?
- Wisconsin DNR lists Smallmouth Bass as common on Clearwater Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Clearwater Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 4 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Clearwater Lake across LakeQuality
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Where this data comes from
28 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX28 samples · 2020–2025
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes