Amnicon Lake
Amnicon Lake in Douglas County, Wisconsin has a water quality grade of B (Good). Water clarity: 5 ft visibility. Phosphorus: 23.2 µg/L. Maximum depth: 31 ft. Surface area: 390 acres.
- Clarity
- 5 ft
- Max depth
- 31 ft
- Area
- 390 acres
- Type
- Eutrophic
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Douglas County
Amnicon Lake is a 390-acre productive, nutrient-rich eutrophic lake in Douglas County, Wisconsin with a maximum depth of 31 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. The lake supports 5 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 1 public boat landing. Compared to the 14 other monitored lakes in Douglas County, Amnicon Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-04-23. Grade methodology: LakeGrade methodology.
Watch Amnicon Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
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 5 ft. Phosphorus level: 23.2 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | Not graded |
| Phosphorus | 23.2 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 Amnicon Lake
Compare lakeside cabins, hotels, and vacation rentals near Amnicon Lake in Douglas 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 Amnicon Lake
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 →
Blue-Green Algae (Cyanobacteria)
There’s no recent EPA CyAN cyanobacteria estimate for Amnicon Lake — clouds, ice, or an off-season gap in coverage. The most recent reading was low (16,144 cells/mL) on May 9, 2026.
Blue-green algae can appear and clear within days, so check your state’s current advisory before swimming. EPA CyAN ↗
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 31 ft |
| Surface Area | 390 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Amnicon LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Amnicon 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 1988. 4 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Amnicon Lake covering fish populations, stocking, water quality, and management. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Amnicon Lake fishery survey, 2024-2025Fisheries Survey · WI DNR (PDF)
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.157 m/yr | 5 |
| Phosphorus | ↑ Improving | -4.35 µg/L/yr | 6 |
EPA Impairment Status
Amnicon 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 WI10008205 · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Amnicon Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- School District Of SuperiorSuperior · 4.9 mi away · NPDES WI0035866Recent 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.
County Ranking
Ranked #3 of 15 lakes in Douglas County
Nearby Lakes in Douglas County
Frequently asked questions about Amnicon Lake
What is the water quality grade for Amnicon Lake?
- Amnicon Lake in Douglas County, Wisconsin has a water quality grade of B (Good). Water clarity: 5 ft visibility. Phosphorus: 23.2 µg/L. Maximum depth: 31 ft. Surface area: 390 acres.
Is Amnicon Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Amnicon Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Amnicon Lake?
- Amnicon Lake has a maximum depth of 31 feet. The lake covers 390 acres.
What fish are in Amnicon Lake?
- Fish species found in Amnicon Lake include Musky, Panfish, Largemouth Bass, Northern Pike, Walleye. Amnicon Lake is located in Douglas County, Wisconsin.
Does Amnicon Lake have blue-green algae?
- There is no recent EPA CyAN cyanobacteria estimate for Amnicon Lake (clouds, ice, or an off-season gap). The most recent reading was low (16,144 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.
Are there boat ramps on Amnicon Lake?
- Amnicon Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Amnicon Lake. Public access is listed as yes.
Explore Amnicon Lake across LakeGrade
Depth, room, public access, and the state wake-sport rules
4.8 mi away · 165 ft
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Douglas County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Lakes in the St. Croix Watershed, ranked by water quality
Lakes in the Lake Superior Basin (MN+WI), ranked by water quality
High nutrients, frequent algae, reduced clarity
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
State Parks Near Amnicon Lake
Other Grade B Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Where this data comes from
69 measurements from 2 monitoring stations, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX69 samples · 2020–2026
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.
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