Tennyson Lake
Isanti County, Minnesota112 acresView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
Tennyson Lake in Isanti County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Surface area: 112 acres.
Tennyson Lake is a 112-acre lake in Isanti County, Minnesota.
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. Tennyson Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Tennyson 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 Tennyson Lake
These are the measurements Minnesota PCA publishes for Tennyson 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 Tennyson Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
112 acres
Shoreline
2.1 mi
No bathymetric survey has been published for Tennyson Lake, so its depth is not documented here.
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Fishing Tennyson Lake
EPA Impairment Status
Tennyson 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 MN30-0113-00 · Official waterbody report
Nearby Lakes in Isanti County
Frequently asked questions about Tennyson Lake
Where is Tennyson Lake?
- Tennyson Lake is a lake in Isanti County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Tennyson Lake?
- Tennyson Lake in Isanti County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Surface area: 112 acres.
Is Tennyson Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Tennyson Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
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Where this data comes from
Measurements for Tennyson 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