Radigan Flowage Lake
Radigan Flowage Lake in Douglas County, Wisconsin has a water quality grade of D (Nutrient-rich). Water clarity: 2 ft visibility. Phosphorus: 94.9 µg/L. Surface area: 150 acres.
- Clarity
- 2 ft
- Area
- 150 acres
- Type
- Eutrophic
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Radigan Flowage Lake →
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Radigan Flowage Lake is a 150-acre productive, nutrient-rich eutrophic lake in Douglas County, Wisconsin. Water quality is graded D based on 1 sampling years through 2025. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 14 other monitored lakes in Douglas County, Radigan Flowage Lake ranks #15 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-09. Grade methodology: LakeQuality 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 2 ft of visibility. Phosphorus level: 94.9 µg/L. Trophic State Index: 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | Not graded |
| Phosphorus | 94.9 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Radigan Flowage Lake
Compare lakeside cabins, hotels, and vacation rentals near Radigan Flowage 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Radigan Flowage Lake are listed below.
Top-rated places to stay near Radigan Flowage Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 150 acres |
| Public Access | Yes |
No bathymetric survey has been published for Radigan Flowage Lake, so its depth is not documented here.
Recreation & Access
- Radigan FlowagePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Radigan Flowage Lake
Reservoir Info (USACE NID)
Radigan Flowage Lake is a man-made reservoir impounded by the Radigan (completed 1938), built primarily for recreation on the Upper Tamarack River; gravity-type dam, 12 ft tall and 300 ft long.
- Surface area
- 150 ac
- Normal storage
- 230 ac-ft
- Max storage
- 420 ac-ft
- Drainage area
- 41 sq mi
- Hazard class
- High
- Owner
- Town Of Dairyland
Source: USACE National Inventory of Dams, NID ID WI00257 · Operator website
County Ranking
Ranked #15 of 15 lakes in Douglas County
Nearby Lakes With Higher Grades
Radigan Flowage Lake holds Grade D. 2 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Douglas County
Frequently asked questions about Radigan Flowage Lake
Where is Radigan Flowage Lake?
- Radigan Flowage Lake is a lake in Douglas County, Wisconsin. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Radigan Flowage Lake?
- Radigan Flowage Lake in Douglas County, Wisconsin has a water quality grade of D (Nutrient-rich). Water clarity: 2 ft visibility. Phosphorus: 94.9 µg/L. Surface area: 150 acres.
Is Radigan Flowage Lake safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Radigan Flowage Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
Are there boat ramps on Radigan Flowage Lake?
- Radigan Flowage Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Radigan Flowage. Public access is listed as yes.
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High nutrients, frequent algae, reduced clarity
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Where this data comes from
6 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX6 samples · 2025
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
Named boat-access points from the USGS National Boat Ramps inventory