Louise Lake
Washington County, Minnesota35 acresView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- 9 ft max depth
Louise Lake in Washington County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 8.7 ft. Surface area: 35 acres.
Louise Lake is a 35-acre lake in Washington County, Minnesota with a maximum depth of 9 feet.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder. Methodology: how these readings are compared.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Louise Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Louise 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 Louise Lake
These are the measurements Minnesota PCA publishes for Louise 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 Louise Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
8.7 ft
Surface area
35 acres
Shoreline
0.9 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
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Fishing Louise Lake
EPA Impairment Status
Louise 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: Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN82-0025-00 · Official waterbody report
Nearby Lakes in Washington County
Frequently asked questions about Louise Lake
Where is Louise Lake?
- Louise Lake is a lake in Washington County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Louise Lake?
- Louise Lake in Washington County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 8.7 ft. Surface area: 35 acres.
Is Louise Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Louise Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Louise Lake?
- Louise Lake has a maximum depth of 8.7 feet. The lake covers 35 acres.
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Where this data comes from
Measurements for Louise 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