Carrol Lake
Carrol Lake in Oneida County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.5 ft visibility. Maximum depth: 27 ft. Surface area: 330 acres.
Wisconsin DNR rates Panfish as abundant on Carrol Lake. DNR survey details →
- Clarity
- 2.5 ft
- Max depth
- 27 ft
- Area
- 330 acres
- Trend
- ↓ Declining
- Public access
- Yes
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Why Carrol Lake has no grade
We grade a lake only when the monitoring record supports a letter: 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 Carrol Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). 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.
Carrol Lake is a 330-acre lake in Oneida County, Wisconsin with a maximum depth of 27 feet. Overall water quality is declining over recent sampling years. The lake supports 5 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-09-09. Grade methodology: LakeQuality 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 Carrol Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.5 ft of visibility. Trophic State Index: 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Carrol Lake
Compare lakeside cabins, hotels, and vacation rentals near Carrol 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 Carrol Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Wisconsin DNR rates Panfish as abundant on Carrol Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality does not assign an A–F grade on Carrol Lake — official chemistry is on file, not a letter, and the water-quality trend over 2 years of monitoring is declining. 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. 2 stations on file (most recent sample 2024).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 27 ft |
| Surface Area | 330 acres |
| Public Access | Yes |
Recreation & Access
- Clear Lake 2Public
- Carrol LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Public campgrounds near Carrol Lake
- Northern Highland - American Legion State Forest Carrol Lake Campground0.8 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Carrol 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: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.75 m/yr | 2 |
EPA Impairment Status
Carrol Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10007641 · Official waterbody report · Matched by proximity (2.18 km)
Graded lakes near Carrol Lake
Carrol Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Oneida County
Frequently asked questions about Carrol Lake
Where is Carrol Lake?
- Carrol Lake is a lake in Oneida County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Carrol Lake?
- Carrol Lake in Oneida County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.5 ft visibility. Maximum depth: 27 ft. Surface area: 330 acres.
Is Carrol Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Carrol 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 Carrol Lake?
- Carrol Lake has a maximum depth of 27 feet. The lake covers 330 acres.
What fish are in Carrol Lake?
- Fish species found in Carrol Lake include Musky, Panfish, Largemouth Bass, Northern Pike, Walleye. Carrol Lake is located in Oneida County, Wisconsin.
What did the DNR fisheries survey find at Carrol Lake?
- Wisconsin DNR rates Panfish as abundant on Carrol Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality does not assign an A–F grade on Carrol Lake — official chemistry is on file, not a letter, and the water-quality trend over 2 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Carrol Lake?
- Carrol Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Clear Lake 2, Carrol Lake. Public access is listed as yes.
Are there campgrounds on Carrol Lake?
- Carrol Lake has 1 public campground from USGS The National Map within 5 km, including Northern Highland - American Legion State Forest Carrol Lake Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Carrol Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
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Where this data comes from
2 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX2 samples · 2024
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
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
Public campgrounds from USGS The National Map Structures, within about 3 miles