Maria-Chapdelaine County Lake Quality
Québec, 4 lakes, average grade B (Good)
Only 4 lakes in Maria-Chapdelaine 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. 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 Brochet (B); the most-stressed is Lac Noir (B).
Quick Answers for Maria-Chapdelaine County
Planning a trip? Check special fishing regulations for Lac Brochet — or check the official Québec fishing regulations.
All Lakes in Maria-Chapdelaine County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lac Brochet | B | 7.9 ft | 10.6 µg/L |
| 2 | Lac Trottier | B | 8.9 ft | 12.1 µg/L |
| 3 | Lac Noir | B | 6.6 ft | 6.5 µg/L |
| 4 | Lac à Houde | B | 4.9 ft | 3.8 µg/L |
Other Counties in Québec
See how Maria-Chapdelaine County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 38 states.
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Source: EPA National Aquatic Resource Surveys, 2026.