Lake Menomin
Lake Menomin in Dunn County, Wisconsin has a water quality grade of D (Nutrient-rich). Water clarity: 3.1 ft visibility. Phosphorus: 89.7 µg/L. Maximum depth: 34 ft. Surface area: 1009 acres.
- Clarity
- 3.1 ft
- Typical in July
- 72°F
- Max depth
- 34 ft
- Area
- 1,009 acres
- Type
- Eutrophic
- Trend
- ↓ Declining
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Lake Menomin →
Next lake in Dunn County
Lake Menomin is a 1,009-acre productive, nutrient-rich eutrophic lake in Dunn County, Wisconsin with a maximum depth of 34 feet. Water quality is graded D based on 1 sampling years through 2026. Overall water quality is declining over recent sampling years. The lake supports 5 documented fish species including Panfish, Largemouth Bass, and Smallmouth Bass. Public access is available with 5 public boat landings. Compared to the 2 other monitored lakes in Dunn County, Lake Menomin ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-16. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
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.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Very murky, less than 3.1 ft of visibility. Phosphorus level: 89.7 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.1 ft | Not graded |
| Phosphorus | 89.7 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Menomin
Compare lakeside cabins, hotels, and vacation rentals near Lake Menomin in Dunn 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Lake Menomin are listed below.
Top-rated places to stay near Lake Menomin
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Planning a trip? Cabins and lodging at Lake Menomin → · more Wisconsin lake trips
Water Temperature
Lake Menomin typically sits around 72°F at the surface in July. Summer average is about 72°F. Usually warmest in Jun (about 72°F) and coldest in Mar (about 44°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 34 field readings (2024–2026) via the EPA Water Quality Portal. See the full Lake Menomin water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 34 ft |
| Surface Area | 1,009 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Wakanda ParkPublic
- Point Comfort ParkPublic
- Lakeside ParkPublic
- La Pointe ParkPublic
- Highway 29 BridgePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Lake Menomin
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 1990. 10 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Lake Menomin 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).
- 2024Lake Menomin spring survey, 2024Fisheries Survey · WI DNR · 2024 (PDF)
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.125 m/yr | 3 |
| Phosphorus | ↓ Declining | +3.8 µg/L/yr | 3 |
Reservoir Info (USACE NID)
Lake Menomin is a man-made reservoir impounded by the Menomonie (completed 1957), built primarily for hydroelectric on the Red Cedar; gravity-type dam, 37 ft tall and 642 ft long.
- Surface area
- 1,405 ac
- Normal storage
- 15,000 ac-ft
- Max storage
- 15,000 ac-ft
- Drainage area
- 1,795 sq mi
- Hazard class
- High
- Owner
- Northern States Power Co
All listed purposes: Hydroelectric;Recreation.
Source: USACE National Inventory of Dams, NID ID WI00735 · Operator website · Matched by proximity (0.75 km)
EPA Impairment Status
Lake Menomin is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit WI10008154 · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Lake Menomin under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Menomonie Wastewater Treatment FacilityMenomonie · 1.5 mi away · NPDES WI0024708MajorRecent 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 #2 of 3 lakes in Dunn County
Nearby Lakes in Dunn County
Frequently asked questions about Lake Menomin
What is the water quality grade for Lake Menomin?
- Lake Menomin in Dunn County, Wisconsin has a water quality grade of D (Nutrient-rich). Water clarity: 3.1 ft visibility. Phosphorus: 89.7 µg/L. Maximum depth: 34 ft. Surface area: 1009 acres.
Is Lake Menomin safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Lake Menomin has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
What is the water temperature of Lake Menomin?
- Lake Menomin typically sits around 72°F at the surface in July, from 34 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Lake Menomin?
- Lake Menomin has a maximum depth of 34 feet. The lake covers 1009 acres.
What fish are in Lake Menomin?
- Fish species found in Lake Menomin include Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Lake Menomin is located in Dunn County, Wisconsin.
Are there boat ramps on Lake Menomin?
- Lake Menomin has 5 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Wakanda Park, Point Comfort Park, Lakeside Park, La Pointe Park, among others. Public access is listed as yes.
Explore Lake Menomin across LakeGrade
Depth, room, public access, and the state wake-sport rules
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Dunn County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
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Where this data comes from
29 measurements from 1 monitoring station, 2022–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX29 samples · 2022–2026
Analytical methods
- Phosphorus by Colorimetry
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