What is the water-quality readings for Birch Lake?

Birch Lake has limited nutrient and algae sampling on record. Water clarity reads 15 feet (Secchi depth). Birch Lake has too little recent summer sampling to compare with the Minnesota state average.

Birch Lake is located in Unknown County, Minnesota. It spans 836 acres with a maximum depth of 34 feet. 10 fish species have been documented in the lake.

Swimming at Birch Lake: Water Readings and Advisories

Birch Lake in Unknown County, Minnesota has limited nutrient and algae sampling on record. A water-quality reading is not a swimming clearance. The state water agency and county health departments post current advisories; check them before you swim.. Water clarity: 15 ft visibility. Always check local health department advisories before swimming.

Key Metrics

Metric	Value
Water Clarity (Secchi Depth)	15 ft
Maximum Depth	34 ft
Location	Unknown County, Minnesota

How does Birch Lake compare?

Birch Lake is not rated for water quality — it does not have enough recent summer sampling for a readings, so it is not compared with the Minnesota state average.

Water clarity (Secchi depth) sits at 15 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.

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More on Birch Lake

How clean is Birch Lake? →What fish are in Birch Lake? →Is Birch Lake polluted? →Full water quality report →Unknown County lakes →Cleanest lakes in Unknown County →Cleanest lakes in Minnesota →