Témiscouata County Lake Quality
Québec, 6 lakes, average grade A (Excellent)
Only 6 lakes in Témiscouata 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's average grade is A — among the cleanest in Québec. 6 lakes pull an A on their own, and almost none fall into the D or F brackets.
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 Jerry (A) is the cleanest in the county.
Quick Answers for Témiscouata County
Planning a trip? Check special fishing regulations for Lac Jerry — or check the official Québec fishing regulations.
All Lakes in Témiscouata County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lac Jerry | A | 19.5 ft | 3.8 µg/L |
| 2 | Lac Long | A | 17.1 ft | 4 µg/L |
| 3 | Grand Lac Squatec | A | 23.3 ft | 3.3 µg/L |
| 4 | Lac TéMiscouata | A | 14.4 ft | 5.9 µg/L |
| 5 | Lac PohéNéGamook | A | 10.5 ft | 5.2 µg/L |
| 6 | Le Beau Lac | A | 11.5 ft | 6.9 µg/L |
Other Counties in Québec
See how Témiscouata 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.