Katherine Lake
Lake County, Minnesota67 acresView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Impaired · Mercury
Katherine Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Surface area: 67 acres.
Katherine Lake is a 67-acre lake in Lake County, Minnesota.
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. Katherine Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Katherine 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 Katherine Lake
These are the measurements Minnesota PCA publishes for Katherine 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 Katherine Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
67 acres
Shoreline
1.6 mi
No bathymetric survey has been published for Katherine Lake, so its depth is not documented here.
Stays via Stay22
Stays near Katherine Lake
Compare lakeside cabins, hotels, and vacation rentals near Katherine 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 Katherine 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 Katherine Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Katherine Lake
EPA Impairment Status
Katherine Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN38-0538-00 · Official waterbody report
Nearby Lakes in Lake County
Frequently asked questions about Katherine Lake
Where is Katherine Lake?
- Katherine 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 Katherine Lake?
- Katherine Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Surface area: 67 acres.
Is Katherine Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Katherine Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Explore Katherine 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 Katherine Lake
Other Lakes in Minnesota
Where this data comes from
Measurements for Katherine 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