Bjorndahl Lake
Clay County, MinnesotaView mapDirections
Minnesota PCA publishes the water-quality measurements for Bjorndahl Lake. Here is what has been measured.
- Public access
- Limited data
Bjorndahl Lake in Clay County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.3 ft visibility.
Bjorndahl Lake is a lake in Clay County, Minnesota. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-09-12. 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 Bjorndahl 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 Bjorndahl Lake
These are the measurements Minnesota PCA publishes for Bjorndahl Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.3 ft of visibility. TSI 65.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 65 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Bjorndahl Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Bjorndahl Lake
Compare lakeside cabins, hotels, and vacation rentals near Bjorndahl Lake in Clay 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 Bjorndahl 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 Bjorndahl Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Bjorndahl Lake
Nearby Lakes in Clay County
Frequently asked questions about Bjorndahl Lake
Where is Bjorndahl Lake?
- Bjorndahl Lake is a lake in Clay County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Bjorndahl Lake?
- Bjorndahl Lake in Clay County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.3 ft visibility.
Is Bjorndahl Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Can I fish at Bjorndahl Lake?
- Public access to Bjorndahl Lake is listed as yes on the lake record. 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.
Explore Bjorndahl Lake across LakeQuality
Fish species and the cleanest lakes across Minnesota
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its readings
Lakes in the Red River of the North Watershed, ranked by water quality
Minnesota's cleanest lakes, ranked on agency measurements
More lakes in Minnesota
State Parks Near Bjorndahl Lake
Other Lakes in Minnesota
Eutrophic Lakes in Minnesota
Where this data comes from
2 measurements from 2 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA1 sample · 2022 - Minnesota Department of Agriculture - Pesticide Monitoring
MNDA_PESTICIDE1 sample · 2022
Analytical methods
- Field measurement/observation, generic method
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.