Watonwan Lake
Lake County, Minnesota58 acresView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Impaired · Mercury
- 25 ft max depth
Watonwan Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 24.9 ft. Surface area: 58 acres.
Watonwan Lake is a 58-acre lake in Lake County, Minnesota with a maximum depth of 25 feet.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Watonwan Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Watonwan Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Watonwan Lake
These are the measurements Minnesota PCA publishes for Watonwan 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 Watonwan Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
24.9 ft
Surface area
58 acres
Shoreline
2.8 mi
Stays via Stay22
Stays near Watonwan Lake
Compare lakeside cabins, hotels, and vacation rentals near Watonwan Lake in Lake County, Minnesota — 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.
Top-rated places to stay near Watonwan 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 Minnesota’s top lakes →
Follow Watonwan Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Watonwan Lake
EPA Impairment Status
Watonwan 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: Fish consumption.
Source: EPA ATTAINS assessment unit MN38-0079-00 · Official waterbody report
Nearby Lakes in Lake County
Frequently asked questions about Watonwan Lake
Where is Watonwan Lake?
- Watonwan Lake is a lake in Lake County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Watonwan Lake?
- Watonwan Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 24.9 ft. Surface area: 58 acres.
Is Watonwan Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Watonwan Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Watonwan Lake?
- Watonwan Lake has a maximum depth of 24.9 feet. The lake covers 58 acres.
Explore Watonwan Lake across LakeQuality
Fish species and the cleanest lakes across Minnesota
Fish species and best lakes in Lake County
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its readings
Lakes in the Lake Superior Basin (MN+WI), ranked by water quality
Minnesota's cleanest lakes, ranked on agency measurements
More lakes in Minnesota
State Parks Near Watonwan Lake
Other Lakes in Minnesota
Where this data comes from
Measurements for Watonwan 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
Lake details from Minnesota DNR LakeFinder