Sept-Rivières County Lake Quality
Québec, 1 lakes, average grade B (Good)
Sept-Rivières County has 1 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-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Lac Labrie (B); the most-stressed is Lac Labrie (B).
Quick Answers for Sept-Rivières County
Planning a trip? Check special fishing regulations for Lac Labrie — or check the official Québec fishing regulations.
All Lakes in Sept-Rivières County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lac Labrie | B | 5.2 ft | 9.9 µg/L |
Other Counties in Québec
See how Sept-Rivières 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 Sept-Rivières County
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Source: EPA National Aquatic Resource Surveys, 2026.