Is Lac Saint-FrançOis safe to swim in?

Good for swimming, clear water with low algae levels. Lac Saint-FrançOis has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 8.2 µg/L. Always check local health department advisories before swimming.

La Rivière-du-Nord County, Québec · Water Quality Report Card

Lac Saint-FrançOis

Grade B — Good

Eutrophic

Lac Saint-FrançOis in La Rivière-du-Nord, Québec received a water quality grade of B (Good). Water clarity: 1.6 m visibility. Phosphorus: 19 µg/L. Chlorophyll-a (algae): 8.2 µg/L.

Clarity: 1.6 m
Type: Eutrophic

Where to stay →Safe to swim?

Lac Saint-FrançOis is a productive, nutrient-rich eutrophic lake in La Rivière-du-Nord County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 16 other monitored lakes in La Rivière-du-Nord County, Lac Saint-FrançOis ranks #16 for water quality.

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

Watch Lac Saint-FrançOis water quality

Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Murky, only visible to about 5.2 ft. Phosphorus level: 19 µg/L. Chlorophyll-a: 8.2 µg/L. Trophic State Index: 50.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.6 m	D
Phosphorus	19 µg/L	A
Chlorophyll-a (Algae)	8.2 µg/L	B
Trophic State Index (TSI)	50	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Lac Saint-FrançOis

Compare lakeside cabins, hotels, and vacation rentals near Lac Saint-FrançOis in La Rivière-du-Nord, 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 Saint-FrançOis

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 trip to Lac Saint-FrançOis?

Get lake water-quality report cards plus the best cabin & lodging deals near Lac Saint-FrançOis — straight to your inbox. No spam, unsubscribe anytime.