Radigan Flowage Lake
Douglas County, Wisconsin150 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Radigan Flowage Lake. Here is what has been measured.
- Eutrophic
- Public access
- Limited data
Radigan Flowage Lake in Douglas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 94.9 µg/L. Surface area: 150 acres.
Radigan Flowage Lake is a 150-acre productive, nutrient-rich eutrophic lake in Douglas County, Wisconsin. 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. Methodology: how these readings are compared.
What Radigan Flowage Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyLimited data
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. Check local advisories before you swim.
Whether Radigan Flowage 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 Radigan Flowage Lake
These are the measurements Wisconsin DNR publishes for Radigan Flowage 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 ft of visibility. Phosphorus 94.9 µg/L. TSI 68.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 94.9µg/L | Poor 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. | 68 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Radigan Flowage Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
150 acres
Public access
Yes
Listed by Wisconsin DNR
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
Stays via Stay22
Stays 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Radigan Flowage Lake are listed below.
Top-rated places to stay near Radigan Flowage Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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 →
Follow Radigan Flowage Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
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
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. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Radigan Flowage Lake?
- Radigan Flowage Lake in Douglas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 94.9 µg/L. Surface area: 150 acres.
Is Radigan Flowage Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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.
Can I fish at Radigan Flowage Lake?
- Radigan Flowage 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 Radigan Flowage Lake across LakeQuality
Fish species and the cleanest 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 readings
Lakes in the St. Croix Watershed, ranked by water quality
Lakes in the Lake Superior Basin (MN+WI), ranked by water quality
Wisconsin's cleanest lakes, ranked on agency measurements
More lakes in Wisconsin
State Parks Near Radigan Flowage Lake
Other Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
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)
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
Named boat-access points from the USGS National Boat Ramps inventory