Little Dummy Lake
Little Dummy Lake in Barron County, Wisconsin has a water quality grade of B (Good). Water clarity: 11 ft visibility. Phosphorus: 14.8 µg/L. Maximum depth: 44 ft. Surface area: 43 acres.
- Clarity
- 11 ft
- Max depth
- 44 ft
- Area
- 43 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Barron County
Little Dummy Lake is a 43-acre mesotrophic lake in Barron County, Wisconsin with a maximum depth of 44 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 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 2 public boat landings. Compared to the 27 other monitored lakes in Barron County, Little Dummy Lake ranks #16 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-29. Grade methodology: LakeGrade methodology.
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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)
Good clarity, visible to about 11 ft. Phosphorus level: 14.8 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11 ft | Not graded |
| Phosphorus | 14.8 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Little Dummy Lake
Compare lakeside cabins, hotels, and vacation rentals near Little Dummy Lake in Barron 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 44 ft |
| Surface Area | 43 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Little Granite LakePublic
- Little Dummy LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Little Dummy 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. 2 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.925 m/yr | 6 |
| Phosphorus | ↑ Improving | -0.69 µg/L/yr | 7 |
EPA Impairment Status
Little Dummy 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 WI10004446 · Official waterbody report · Matched by proximity (0.95 km)
County Ranking
Ranked #16 of 28 lakes in Barron County
Nearby Lakes in Barron County
Frequently asked questions about Little Dummy Lake
What is the water quality grade for Little Dummy Lake?
- Little Dummy Lake in Barron County, Wisconsin has a water quality grade of B (Good). Water clarity: 11 ft visibility. Phosphorus: 14.8 µg/L. Maximum depth: 44 ft. Surface area: 43 acres.
Is Little Dummy Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Little Dummy Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Little Dummy Lake?
- Little Dummy Lake has a maximum depth of 44 feet. The lake covers 43 acres.
What fish are in Little Dummy Lake?
- Fish species found in Little Dummy Lake include Panfish, Largemouth Bass, Northern Pike. Little Dummy Lake is located in Barron County, Wisconsin.
Are there boat ramps on Little Dummy Lake?
- Little Dummy Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Little Granite Lake, Little Dummy Lake. Public access is listed as yes.
Explore Little Dummy Lake across LakeGrade
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Moderate nutrients, good water quality
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Where this data comes from
35 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_WQX35 samples · 2020–2026
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
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