Rivière-du-Loup County Lake Quality
Québec, 3 lakes, average grade B (Good)
Only 3 lakes in Rivière-du-Loup County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. With an average grade of B, Rivière-du-Loup County sits comfortably above the Québec median.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Lac Saint-FrançOis (B) is the cleanest in the county.
Quick Answers for Rivière-du-Loup County
Planning a trip? Check special fishing regulations for Lac Saint-FrançOis — or check the official Québec fishing regulations.
All Lakes in Rivière-du-Loup County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lac Saint-FrançOis | B | 8.2 ft | 8.9 µg/L |
| 2 | Lac Saint-Hubert | B | 7.5 ft | 15.8 µg/L |
| 3 | Lac de la Grande Fourche | B | 7.2 ft | 13 µg/L |
Other Counties in Québec
See how Rivière-du-Loup County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 38 states.
Where to stay near Rivière-du-Loup County
Top-rated places to stay near Rivière-du-Loup County
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 Rivière-du-Loup County?
Get lake water-quality report cards plus the best cabin & lodging deals near Rivière-du-Loup County — straight to your inbox. No spam, unsubscribe anytime.
Source: EPA National Aquatic Resource Surveys, 2026.