Abitibi-Témiscamingue County Lake Quality
Québec, 19 lakes, average grade B (Good)
Abitibi-Témiscamingue County's 19 graded lakes fall in the moderate-density bracket for Québec. The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. With an average grade of B, Abitibi-Témiscamingue County sits comfortably above the Québec median.
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 Fortune (A) is the cleanest in the county.
Quick Answers for Abitibi-Témiscamingue County
Planning a trip? Check special fishing regulations for Lac Fortune — or check the official Québec fishing regulations.
All Lakes in Abitibi-Témiscamingue County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lac Fortune | A | 15.4 ft | 7 µg/L |
| 2 | Lac Dufault | A | 12.5 ft | 8 µg/L |
| 3 | Lac Osisko | A | 12.8 ft | 11.5 µg/L |
| 4 | Lac Vaudray | B | 7.5 ft | 6.7 µg/L |
| 5 | Lac JoannèS | B | 5.1 ft | 9.6 µg/L |
| 6 | Lac King of the North | B | 7.4 ft | 12.9 µg/L |
| 7 | Lac Mud | B | 8.5 ft | 13.8 µg/L |
| 8 | Lac ÉVain | B | 6.2 ft | 10.5 µg/L |
| 9 | Lac D'Alembert | B | 4.4 ft | 14.2 µg/L |
| 10 | Lac Opasatica | B | 3.9 ft | 17.8 µg/L |
| 11 | Lac Marlon | B | 4.9 ft | 22.4 µg/L |
| 12 | Lac Rouyn | C | 8.2 ft | 56.6 µg/L |
| 13 | Petit Lac Dufresnoy | C | 3.3 ft | 24.3 µg/L |
| 14 | Lac Noranda | C | 3.9 ft | 28.6 µg/L |
| 15 | Lac Dufresnoy | C | 2.3 ft | 28.2 µg/L |
| 16 | Lac Matissard | C | 3.3 ft | 24.5 µg/L |
| 17 | Lac LoïS | C | 3.1 ft | 23.6 µg/L |
| 18 | Lac Pelletier | C | 7.5 ft | 39.4 µg/L |
| 19 | Lac Hervé | C | 1.6 ft | 45 µg/L |
Other Counties in Québec
See how Abitibi-Témiscamingue 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.