Is Lac Magnan safe to swim in?

Good for swimming, clear water with low algae levels. Lac Magnan has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 9 µg/L. Always check local health department advisories before swimming.

Les Laurentides County, Québec · Water Quality Report Card

Lac Magnan

Grade B — Good

Mesotrophic

Lac Magnan in Les Laurentides, Québec received a water quality grade of B (Good). Water clarity: 3 m visibility. Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 9 µg/L.

Clarity: 3 m
Type: Mesotrophic

Where to stay →Safe to swim?

Lac Magnan is a mesotrophic lake in Les Laurentides County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 118 other monitored lakes in Les Laurentides County, Lac Magnan ranks #108 for water quality.

Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2025-08-01. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 9.7 ft. Phosphorus level: 12.5 µg/L. Chlorophyll-a: 9 µg/L. Trophic State Index: 46.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.95 m	C
Phosphorus	12.5 µg/L	A
Chlorophyll-a (Algae)	9 µg/L	B
Trophic State Index (TSI)	46	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Lac Magnan

Compare lakeside cabins, hotels, and vacation rentals near Lac Magnan in Les Laurentides, Québec — 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 Lac Magnan