Loon Lake Inlet
Cook County, MinnesotaView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Limited data
Loon Lake Inlet in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported.
Loon Lake Inlet is a lake in Cook County, Minnesota. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-10-03. 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 Loon Lake Inlet 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 Loon Lake Inlet
These are the measurements Minnesota PCA publishes for Loon Lake Inlet, 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 Loon Lake Inlet
Answers come straight from the public measurements and survey records on this page.
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Stays near Loon Lake Inlet
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Fishing Loon Lake Inlet
Water quality readings over time
3 seasons of samples on record (2020–2024). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Stable2 years
Phosphorus
Improving-3.18 µg/L/yr3 years
Chlorophyll-a
Improving-0.38 µg/L/yr3 years
Nearby Lakes in Cook County
Frequently asked questions about Loon Lake Inlet
Where is Loon Lake Inlet?
- Loon Lake Inlet is a lake in Cook County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Loon Lake Inlet?
- Loon Lake Inlet in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported.
Is Loon Lake Inlet safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Loon Lake Inlet across LakeQuality
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Where this data comes from
5 measurements from 2 monitoring stations, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Grand Portage Reservation
GPC5_WQX3 samples · 2022 - 21GPBCH - Grand Portage Beaches (Tribal)
21GPBCH2 samples · 2020
Analytical methods
- Turbidity by Nephelometry
Monitoring station identifiers (2)
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.