Charlevoix County Lake Quality
Québec, 2 lakes, average grade A (Excellent)
Charlevoix County has 2 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. The county's average grade is A — among the cleanest in Québec. 1 lakes pull an A on their own, and almost none fall into the D or F brackets.
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 des Bois Verts (A) is the cleanest in the county.
Quick Answers for Charlevoix County
Planning a trip? Check special fishing regulations for Lac des Bois Verts — or check the official Québec fishing regulations.
All Lakes in Charlevoix County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lac des Bois Verts | A | 16.1 ft | 3.5 µg/L |
| 2 | Lac Arthabaska | B | 7.5 ft | 11.6 µg/L |
Other Counties in Québec
See how Charlevoix 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 Charlevoix County
Top-rated places to stay near Charlevoix 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 Charlevoix County?
Get lake water-quality report cards plus the best cabin & lodging deals near Charlevoix County — straight to your inbox. No spam, unsubscribe anytime.
Source: EPA National Aquatic Resource Surveys, 2026.