Unn Lake
Hennepin County, MinnesotaView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Limited data
Unn Lake in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported.
Unn Lake is a lake in Hennepin County, Minnesota. Overall water quality is declining over recent sampling years. Limited fish-species data available. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2020-02-25. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Unn 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 Unn Lake
These are the measurements Minnesota PCA publishes for Unn 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.
Ask about Unn Lake
Answers come straight from the public measurements and survey records on this page.
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Stays near Unn Lake
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Fishing Unn Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2025).
Water clarity
Worsening5 years
Phosphorus
Stable-0.16 µg/L/yr5 years
Chlorophyll-a
Worsening+1.58 µg/L/yr5 years
Nearby Lakes in Hennepin County
Frequently asked questions about Unn Lake
Where is Unn Lake?
- Unn Lake is a lake in Hennepin County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Unn Lake?
- Unn Lake in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported.
Is Unn Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Can I fish at Unn Lake?
- Public access to Unn Lake is listed as no on the lake record, so confirm before you make the trip. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
8 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA8 samples · 2020
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.