Twin Valley Lake
Iowa County, Wisconsin136 acresView mapDirections
No nutrient or algae sampling on record from Wisconsin DNR for this lake.
- Impaired · Cause unknown
- 32 ft max depth
- Public access
Twin Valley Lake in Iowa County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 32 ft. Surface area: 136 acres.
Twin Valley Lake is a 136-acre lake in Iowa County, Wisconsin with a maximum depth of 32 feet (11-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water. Methodology: how these readings are compared.
What Twin Valley Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Deep water32 ft surveyed max depth
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Twin Valley Lake is listed impaired under Clean Water Act §303(d) (IR 5) for cause unknown. Check local advisories before you swim.
Whether Twin Valley 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 Twin Valley Lake
These are the measurements Wisconsin DNR publishes for Twin Valley Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Twin Valley Lake
Answers come straight from the public measurements and survey records on this page.
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Twin Valley Lake 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).
- 2018Twin Valley Lake comprehensive survey 2018Comprehensive Survey · WI DNR · 2018 (PDF)
Lake Details
Max depth
32 ft
Average depth
11 ft
Surface area
136 acres
Shoreline
5.4 mi
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Twin Valley 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 Twin Valley Lake
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Fishing Twin Valley Lake
EPA Impairment Status
Twin Valley 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: Recreation.
Source: EPA ATTAINS assessment unit WI10026083 · Official waterbody report
Nearby Lakes in Iowa County
Frequently asked questions about Twin Valley Lake
Where is Twin Valley Lake?
- Twin Valley Lake is a lake in Iowa County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Twin Valley Lake?
- Twin Valley Lake in Iowa County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 32 ft. Surface area: 136 acres.
Is Twin Valley Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Twin Valley Lake is listed impaired under Clean Water Act §303(d) (IR 5) for cause unknown. Check local advisories before you swim.
How deep is Twin Valley Lake?
- Twin Valley Lake has a maximum depth of 32 feet and an average depth of 11 feet. The lake covers 136 acres.
Are there boat ramps on Twin Valley Lake?
- Twin Valley Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Twin Valley Lake. Public access is listed as yes.
Can I fish at Twin Valley Lake?
- Twin Valley 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.
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Where this data comes from
Measurements for Twin Valley Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory