La Vallée-de-la-Gatineau County, Québec · Water Quality Report Card
Petit Lac du Castor Blanc
Petit Lac du Castor Blanc in La Vallée-de-la-Gatineau, Québec received a water quality grade of B (Good). Water clarity: 2.3 m visibility. Phosphorus: 13.1 µg/L. Chlorophyll-a (algae): 3.1 µg/L.
- Clarity
- 2.3 m
- Type
- Mesotrophic
Petit Lac du Castor Blanc is a mesotrophic lake in La Vallée-de-la-Gatineau County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 35 other monitored lakes in La Vallée-de-la-Gatineau County, Petit Lac du Castor Blanc ranks #35 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 7.5 ft. Phosphorus level: 13.1 µg/L. Chlorophyll-a: 3.1 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 m | C |
| Phosphorus | 13.1 µg/L | A |
| Chlorophyll-a (Algae) | 3.1 µg/L | A |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Petit Lac du Castor Blanc
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Fishing Petit Lac du Castor Blanc
Location
County Ranking
Ranked #35 of 36 lakes in La Vallée-de-la-Gatineau
Cleaner Lakes Within 30 Miles
Petit Lac du Castor Blanc holds Grade B. 5 nearby lakes hold higher grades.
- ALac PopeAntoine-Labelle · 6.3 mi · Higher grade (B → A)
- ALac QuinnAntoine-Labelle · 6.7 mi · Higher grade (B → A)
- ALac Bois FrancLa Vallée-de-la-Gatineau · 15.4 mi · Higher grade (B → A)
- ALac du Castor BlancLa Vallée-de-la-Gatineau · 0.4 mi · Higher grade (B → A)
- ALac MurrayLa Vallée-de-la-Gatineau · 7.5 mi · Higher grade (B → A)
Nearby Lakes in La Vallée-de-la-Gatineau
Explore Petit Lac du Castor Blanc 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 Petit Lac du Castor Blanc 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: