Le Domaine-du-Roy County Lake Quality
Québec, 13 lakes, average grade B (Good)
Le Domaine-du-Roy County has 13 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 à Almas (A); the most-stressed is Lac Rond (B).
Quick Answers for Le Domaine-du-Roy County
Planning a trip? Check special fishing regulations for Lac à Almas — or check the official Québec fishing regulations.
All Lakes in Le Domaine-du-Roy County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lac à Almas | A | 10.5 ft | 6.6 µg/L |
| 2 | Lac des Commissaires | B | 6.9 ft | 8.8 µg/L |
| 3 | Lac ÉCarté | B | 9.2 ft | 6.1 µg/L |
| 4 | Lac Maggie | B | 6.9 ft | 9.1 µg/L |
| 5 | Lac des Bouleaux | B | 9.5 ft | 6.1 µg/L |
| 6 | Lac Bouchette | B | 7.4 ft | 7.5 µg/L |
| 7 | Lac Ouiatchouan | B | 7.1 ft | 8.3 µg/L |
| 8 | Lac PrinzèLes | B | 9.7 ft | 6.5 µg/L |
| 9 | Lac la PêChe | B | 9.4 ft | 6.1 µg/L |
| 10 | Lac Au Mirage | B | 4.6 ft | 11.6 µg/L |
| 11 | Lac Rond | B | 5.6 ft | 9.4 µg/L |
| 12 | Lac Saint-Jean | B | 6.6 ft | 7.5 µg/L |
| 13 | Lac Rond | B | 6.6 ft | 11.7 µg/L |
Other Counties in Québec
See how Le Domaine-du-Roy 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.