Clearwater Lake
Oneida County, Wisconsin360 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Clearwater Lake. Here is what has been measured.
- Oligotrophic
- 48 ft max depth
Clearwater Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. 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 →
Clearwater Lake is a 360-acre cold, clear oligotrophic lake in Oneida County, Wisconsin with a maximum depth of 48 feet. 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. Methodology: how these readings are compared.
Clearwater Lake covers about 360 acres in Oneida County. For a place on the water, look through cabin and lake-house rentals near Clearwater Lake on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Clearwater Lake is good for
From access and monitoring records, not editorial picks.
- Clear water16.8 ft of visibility
- Fishing6 species recorded
- Deep water48 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
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 Clearwater 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 Clearwater Lake
These are the measurements Wisconsin DNR publishes for Clearwater Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 16.8 ft down. Phosphorus 10 µg/L. TSI 37.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 16.8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/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. | 37 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Clearwater Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Clearwater Lake typically sits around 61°F at the surface in October. 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.
Column height runs from this lake’s coldest month (60°F) to its warmest (78°F).
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 water quality. LakeQuality shows Clearwater Lake’s water-quality measurements separately, 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
Max depth
48 ft
Surface area
360 acres
Lake Size & Watershed
Watershed (drainage) area
3 sq mi
HydroLAKES / HydroSHEDS
Shoreline
4.6 mi
HydroLAKES / HydroSHEDS
Elevation
1,624 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays 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
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Follow Clearwater Lake’s readings
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Fish Species
Click a species to see every 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 (2020–2025).
Water clarity
Improving3 years
Phosphorus
Improving-0.7 µg/L/yr4 years
Nearby Lakes in Oneida County
Frequently asked questions about Clearwater Lake
Where is Clearwater Lake?
- Clearwater Lake is a lake in Oneida County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Clearwater Lake?
- Clearwater Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. 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?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Clearwater Lake?
- Clearwater Lake typically sits around 61°F at the surface in October, 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 water quality. LakeQuality shows Clearwater Lake’s water-quality measurements separately, 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)
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