Le Domaine-du-Roy County, Québec · Water Quality Report Card
Lac des Commissaires
Lac des Commissaires in Le Domaine-du-Roy, Québec received a water quality grade of B (Good). Water clarity: 2.1 m visibility. Phosphorus: 8.8 µg/L. Chlorophyll-a (algae): 3.6 µg/L.
- Clarity
- 2.1 m
- Type
- Mesotrophic
Lac des Commissaires is a mesotrophic lake in Le Domaine-du-Roy County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 12 other monitored lakes in Le Domaine-du-Roy County, Lac des Commissaires ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2025-08-01. Grade methodology: LakeGrade methodology.
Watch Lac des Commissaires water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 6.9 ft. Phosphorus level: 8.8 µg/L. Chlorophyll-a: 3.6 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.1 m | C |
| Phosphorus | 8.8 µg/L | A |
| Chlorophyll-a (Algae) | 3.6 µg/L | A |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lac des Commissaires
Compare lakeside cabins, hotels, and vacation rentals near Lac des Commissaires in Le Domaine-du-Roy, Québec — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Lac des Commissaires
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Lac des Commissaires?
Get lake water-quality report cards plus the best cabin & lodging deals near Lac des Commissaires — straight to your inbox. No spam, unsubscribe anytime.
Fishing Lac des Commissaires
Location
County Ranking
Ranked #2 of 13 lakes in Le Domaine-du-Roy
Nearby Lakes in Le Domaine-du-Roy
Explore Lac des Commissaires 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 des Commissaires 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: