Le Val-Saint-François County, Québec · Water Quality Report Card
Lac Brais
Lac Brais in Le Val-Saint-François, Québec received a water quality grade of B (Good). Water clarity: 2.8 m visibility. Phosphorus: 11.9 µg/L. Chlorophyll-a (algae): 7 µg/L.
- Clarity
- 2.8 m
- Type
- Mesotrophic
Lac Brais is a mesotrophic lake in Le Val-Saint-François County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 9 other monitored lakes in Le Val-Saint-François County, Lac Brais ranks #6 for water quality.
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
Moderate clarity, visible to about 9.2 ft. Phosphorus level: 11.9 µg/L. Chlorophyll-a: 7 µg/L. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 m | C |
| Phosphorus | 11.9 µg/L | A |
| Chlorophyll-a (Algae) | 7 µg/L | B |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Lac Brais
Location
County Ranking
Ranked #6 of 10 lakes in Le Val-Saint-François
Cleaner Lakes Within 30 Miles
Lac Brais holds Grade B. 5 nearby lakes hold higher grades.
- ALac BowkerMemphrémagog · 3.1 mi · Higher grade (B → A)
- ALac SimoneauMemphrémagog · 3.3 mi · Higher grade (B → A)
- ALac BromptonMemphrémagog · 3.6 mi · Higher grade (B → A)
- ALac des MontsMemphrémagog · 3.7 mi · Higher grade (B → A)
- BLac des FrançAisMemphrémagog · 1.5 mi · Higher overall water quality score
Nearby Lakes in Le Val-Saint-François
Explore Lac Brais across LakeGrade
More Québec Lake Rankings
Other Grade B Lakes in Québec
Mesotrophic Lakes in Québec
More records, surveys & data sources
Where this data comes from
Measurements for Lac Brais 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: