Les Sources County, Québec · Water Quality Report Card
Lac à la Truite
Lac à la Truite in Les Sources, Québec received a water quality grade of B (Good). Water clarity: 1.4 m visibility. Phosphorus: 16.2 µg/L. Chlorophyll-a (algae): 7.2 µg/L.
- Clarity
- 1.4 m
- Type
- Mesotrophic
Lac à la Truite is a mesotrophic lake in Les Sources County, Québec. Water quality is graded B based on 3 sampling years through 2025.
Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2025-08-01. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 4.4 ft. Phosphorus level: 16.2 µg/L. Chlorophyll-a: 7.2 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.35 m | D |
| Phosphorus | 16.2 µg/L | A |
| Chlorophyll-a (Algae) | 7.2 µg/L | B |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Lac à la Truite
Location
County Ranking
Ranked #1 of 1 lakes in Les Sources
Cleaner Lakes Within 30 Miles
Lac à la Truite holds Grade B. 5 nearby lakes hold higher grades.
- ALac NicoletArthabaska · 2.7 mi · Higher grade (B → A)
- ALac BreechesLes Appalaches · 9 mi · Higher grade (B → A)
- ALac D'ArgentLe Haut-Saint-François · 11.4 mi · Higher grade (B → A)
- BLac AylmerLes Appalaches · 10.2 mi · Higher overall water quality score
- BLac de L'EstLes Appalaches · 12.2 mi · Higher overall water quality score
Nearby Lakes in Les Sources
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Mesotrophic Lakes in Québec
More records, surveys & data sources
Where this data comes from
Measurements for Lac à la Truite come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2025-08-01
Monitoring stations: