Les Collines-de-l'Outaouais County, Québec · Water Quality Report Card
Lac Gauvreau
Lac Gauvreau in Les Collines-de-l'Outaouais, Québec received a water quality grade of B (Good). Water clarity: 2.4 m visibility. Phosphorus: 15.4 µg/L. Chlorophyll-a (algae): 7.3 µg/L.
- Clarity
- 2.4 m
- Type
- Mesotrophic
Lac Gauvreau is a mesotrophic lake in Les Collines-de-l'Outaouais County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 10 other monitored lakes in Les Collines-de-l'Outaouais County, Lac Gauvreau ranks #10 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 7.7 ft. Phosphorus level: 15.4 µg/L. Chlorophyll-a: 7.3 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.35 m | C |
| Phosphorus | 15.4 µg/L | A |
| Chlorophyll-a (Algae) | 7.3 µg/L | B |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lac Gauvreau
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Fishing Lac Gauvreau
Location
County Ranking
Ranked #10 of 11 lakes in Les Collines-de-l'Outaouais
Cleaner Lakes Within 30 Miles
Lac Gauvreau holds Grade B. 5 nearby lakes hold higher grades.
- ALac BernardLes Collines-de-l'Outaouais · 6.9 mi · Higher grade (B → A)
- ALac LacailleLes Collines-de-l'Outaouais · 9.5 mi · Higher grade (B → A)
- ALac TeeplesLes Collines-de-l'Outaouais · 10.8 mi · Higher grade (B → A)
- ALac MahonLes Collines-de-l'Outaouais · 2.4 mi · Higher grade (B → A)
- ALac Jean-VenneLes Collines-de-l'Outaouais · 3.9 mi · Higher grade (B → A)
Nearby Lakes in Les Collines-de-l'Outaouais
Explore Lac Gauvreau 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 Gauvreau 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: