Mary Lake
Stearns County, Minnesota127 acresView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Impaired · Mercury
- 58 ft max depth
Mary Lake in Stearns County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 58 ft. Surface area: 127 acres.
Mary Lake is a 127-acre lake in Stearns County, Minnesota with a maximum depth of 58 feet.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder. Methodology: how these readings are compared.
What Mary Lake is good for
From access and monitoring records, not editorial picks.
- Deep water58 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Mary Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Mary 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 Mary Lake
These are the measurements Minnesota PCA publishes for Mary 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 Mary Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
58 ft
Surface area
127 acres
Shoreline
4.4 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
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Fishing Mary Lake
EPA Impairment Status
Mary 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 MN77-0019-00 · Official waterbody report
Nearby Lakes in Stearns County
Frequently asked questions about Mary Lake
Where is Mary Lake?
- Mary Lake is a lake in Stearns County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Mary Lake?
- Mary Lake in Stearns County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 58 ft. Surface area: 127 acres.
Is Mary Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Mary Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Mary Lake?
- Mary Lake has a maximum depth of 58 feet. The lake covers 127 acres.
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Where this data comes from
Measurements for Mary 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