Matawinie County, Québec · Water Quality Report Card
Lac Marchand
Lac Marchand in Matawinie, Québec received a water quality grade of B (Good). Water clarity: 1.8 m visibility. Phosphorus: 14.2 µg/L. Chlorophyll-a (algae): 3.9 µg/L.
- Clarity
- 1.8 m
- Type
- Mesotrophic
Lac Marchand is a mesotrophic lake in Matawinie County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 111 other monitored lakes in Matawinie County, Lac Marchand ranks #92 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
Murky, only visible to about 5.7 ft. Phosphorus level: 14.2 µg/L. Chlorophyll-a: 3.9 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.75 m | D |
| Phosphorus | 14.2 µg/L | A |
| Chlorophyll-a (Algae) | 3.9 µg/L | A |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Lac Marchand
Location
County Ranking
Ranked #92 of 112 lakes in Matawinie
Cleaner Lakes Within 30 Miles
Lac Marchand holds Grade B. 5 nearby lakes hold higher grades.
- ALac StevensMatawinie · 2.4 mi · Higher grade (B → A)
- ALac RougeMatawinie · 3 mi · Higher grade (B → A)
- ALac LongMatawinie · 2.4 mi · Higher grade (B → A)
- ALac LéonMatawinie · 2.7 mi · Higher grade (B → A)
- ALac des FrançAisMatawinie · 3 mi · Higher grade (B → A)
Nearby Lakes in Matawinie
Explore Lac Marchand 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 Marchand 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: