La Jacques-Cartier County Lake Quality
Québec, 7 lakes, average grade A (Excellent)
Only 7 lakes in La Jacques-Cartier 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. On average, La Jacques-Cartier County lakes grade an A. That puts it near the top of the Québec county ranking.
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 Beauport (A); the most-stressed is Lac Morin (B).
Quick Answers for La Jacques-Cartier County
Planning a trip? Check special fishing regulations for Lac Beauport — or check the official Québec fishing regulations.
All Lakes in La Jacques-Cartier County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lac Beauport | A | 16.7 ft | 4.7 µg/L |
| 2 | Les Trois Petits Lacs | A | 14.9 ft | 5.6 µg/L |
| 3 | Lac Bleu | A | 13.8 ft | 7.6 µg/L |
| 4 | Lac Saint-Joseph | A | 12.8 ft | 5.9 µg/L |
| 5 | Lac Delage | A | 13.8 ft | 5.9 µg/L |
| 6 | Lac Tourbillon | B | 7.2 ft | 7.7 µg/L |
| 7 | Lac Morin | B | 6.1 ft | 10.9 µg/L |
Other Counties in Québec
See how La Jacques-Cartier 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.