Upper Clam Lake
Upper Clam Lake in Burnett County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2 ft visibility. Maximum depth: 11 ft. Surface area: 1338 acres.
- Clarity
- 2 ft
- Max depth
- 11 ft
- Area
- 1,338 acres
- Trend
- ↓ Declining
- Public access
- Yes
Next lake in Burnett County
Why Upper Clam Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Upper Clam Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Upper Clam Lake is a 1,338-acre lake in Burnett County, Wisconsin with a maximum depth of 11 feet. Overall water quality is declining over recent sampling years. The lake supports 7 documented fish species including Panfish, Largemouth Bass, and Smallmouth Bass. Public access is available with 3 public boat landings.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-01. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Upper Clam Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 2 ft of visibility. Trophic State Index: 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 67 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Upper Clam Lake
Compare lakeside cabins, hotels, and vacation rentals near Upper Clam Lake in Burnett 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 Upper Clam Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 11 ft |
| Surface Area | 1,338 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Clam Lake - EastPublic
- Clam Lake - Narrows County ParkPublic
- Clam LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Upper Clam 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.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2009. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.207 m/yr | 6 |
| Phosphorus | ↓ Declining | +9.2 µg/L/yr | 6 |
| Chlorophyll-a | ↓ Declining | +3.65 µg/L/yr | 6 |
EPA Impairment Status
Upper Clam Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5R).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10006735 · Official waterbody report · Matched by proximity (0.45 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Upper Clam Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Webster Village OfWebster · 4.1 mi away · NPDES WI0028843Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Graded lakes near Upper Clam Lake
Upper Clam Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Burnett County
Frequently asked questions about Upper Clam Lake
What is the water quality grade for Upper Clam Lake?
- Upper Clam Lake in Burnett County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2 ft visibility. Maximum depth: 11 ft. Surface area: 1338 acres.
Is Upper Clam Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Upper Clam Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Upper Clam Lake?
- Upper Clam Lake has a maximum depth of 11 feet. The lake covers 1338 acres.
What fish are in Upper Clam Lake?
- Fish species found in Upper Clam Lake include Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye, Sturgeon, Catfish. Upper Clam Lake is located in Burnett County, Wisconsin.
Are there boat ramps on Upper Clam Lake?
- Upper Clam Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Clam Lake - East, Clam Lake - Narrows County Park, Clam Lake. Public access is listed as yes.
Explore Upper Clam Lake across LakeGrade
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Where this data comes from
7 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX7 samples · 2024–2025
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory