Gwin Lake
Beltrami County, MinnesotaView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Limited data
Gwin Lake in Beltrami County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported.
Gwin Lake is a lake in Beltrami County, Minnesota. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2020-03-04. 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 Gwin 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 Gwin Lake
These are the measurements Minnesota PCA publishes for Gwin 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 Gwin Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Gwin Lake
Compare lakeside cabins, hotels, and vacation rentals near Gwin Lake in Beltrami County, Minnesota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Gwin Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Minnesota’s top lakes →
Follow Gwin Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Gwin Lake
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Stable6 years
Phosphorus
Worsening+0.29 µg/L/yr6 years
Chlorophyll-a
Worsening+0.09 µg/L/yr6 years
Nearby Lakes in Beltrami County
Frequently asked questions about Gwin Lake
Where is Gwin Lake?
- Gwin Lake is a lake in Beltrami County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Gwin Lake?
- Gwin Lake in Beltrami County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported.
Is Gwin Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Gwin Lake across LakeQuality
Fish species and the cleanest lakes across Minnesota
Fish species and best lakes in Beltrami County
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its readings
Lakes in the Mississippi Headwaters, ranked by water quality
Minnesota's cleanest lakes, ranked on agency measurements
More lakes in Minnesota
State Parks Near Gwin Lake
Other Lakes in Minnesota
Where this data comes from
2 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Red Lake DNR
REDLAKE_WQX2 samples · 2020
Analytical methods
- Phosphorus by Two Reagent Colorimetry
- Turbidity by Nephelometry
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.