Moen Lake
Oneida County, Wisconsin461 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Moen Lake. Here is what has been measured.
- Eutrophic
- Impaired · Mercury
- Rusty Crayfish
- 11 ft max depth
- Public access
Moen Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 2.8 ft visibility. Phosphorus: 31 µg/L. Maximum depth: 11 ft. Surface area: 461 acres.
Wisconsin DNR lists Musky as common on Moen Lake. DNR survey details →
Moen Lake is a 461-acre productive, nutrient-rich eutrophic lake in Oneida County, Wisconsin with a maximum depth of 11 feet. Water clarity is declining over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 1 public boat landing. Compared to the 66 other monitored lakes in Oneida County, Moen Lake ranks #57 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-07-11. Methodology: how these readings are compared.
Moen Lake covers about 460 acres in Oneida County. It has one public boat landing. Vrbo is where to look for cabins and lake homes around Moen Lake, and Booking.com and Expedia search hotels near the lake for your dates.
What Moen Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing6 species recorded
Swimming conditions
Readings onlyModerate 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. Moen Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Moen 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 Moen Lake
These are the measurements Wisconsin DNR publishes for Moen Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.8 ft of visibility. Phosphorus 31 µg/L. TSI 58.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 31µg/L | Fair 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. | 58 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Moen Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Moen Lake typically sits around 65°F at the surface in September. Summer average is about 72°F. Usually warmest in Jul (about 75°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 (75°F).
Typical surface water temperature by month, from 58 field readings (2024–2026) via the EPA Water Quality Portal. See the full Moen Lake water temperature breakdown →
Blue-Green Algae (Cyanobacteria)
There’s no recent EPA CyAN cyanobacteria estimate for Moen Lake — clouds, ice, or an off-season gap in coverage. The most recent reading was high (337,287 cells/mL) on May 28, 2026.
Blue-green algae can appear and clear within days, so check your state’s current advisory before swimming. EPA CyAN ↗
Wisconsin DNR lists Musky as common on Moen Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Moen Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is stable. 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 2006. 3 stations on file (most recent sample 2026).
Fish Species (DNR-rated)
Lake Details
Max depth
11 ft
Surface area
461 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Moen LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Moen Lake
Compare lakeside cabins, hotels, and vacation rentals near Moen 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 Moen Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Follow Moen Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Moen 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: Stable
Based on 7 years of monitoring (2020–2026).
Water clarity
Worsening7 years
Phosphorus
Improving-0.79 µg/L/yr7 years
EPA Impairment Status
Moen Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit WI10008940 · Official waterbody report
Nearby Lakes in Oneida County
Frequently asked questions about Moen Lake
Where is Moen Lake?
- Moen 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 Moen Lake?
- Moen Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 2.8 ft visibility. Phosphorus: 31 µg/L. Maximum depth: 11 ft. Surface area: 461 acres.
Is Moen Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Moen Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
What is the water temperature of Moen Lake?
- Moen Lake typically sits around 65°F at the surface in September, from 58 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Moen Lake?
- Moen Lake has a maximum depth of 11 feet. The lake covers 461 acres.
What fish are in Moen Lake?
- Fish species found in Moen Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Moen Lake is located in Oneida County, Wisconsin.
What did the DNR fisheries survey find at Moen Lake?
- Wisconsin DNR lists Musky as common on Moen Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Moen Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Does Moen Lake have blue-green algae?
- There is no recent EPA CyAN cyanobacteria estimate for Moen Lake (clouds, ice, or an off-season gap). The most recent reading was high (337,287 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.
Are there boat ramps on Moen Lake?
- Moen Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Moen Lake. Public access is listed as yes.
Can I fish at Moen Lake?
- Moen Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Explore Moen Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
Fish species and the cleanest lakes across Wisconsin
Fish species and best lakes in Oneida County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Northwoods Wisconsin area
Top lakes and where to stay in the Minocqua Chain area
Where to stay at Wisconsin's top lakes, each with its readings
Lakes in the Wisconsin River Watershed, ranked by water quality
Wisconsin's cleanest lakes, ranked on agency measurements
More lakes in Wisconsin
Other Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Compare Moen Lake With Nearby Lakes
Where this data comes from
67 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX67 samples · 2020–2026
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
Impairment status from EPA ATTAINS 303(d) database
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory