Antoine-Labelle County, Québec · Water Quality Report Card
Lac Sainte-Marie
Lac Sainte-Marie in Antoine-Labelle, Québec received a water quality grade of B (Good). Water clarity: 2.1 m visibility. Phosphorus: 11.9 µg/L. Chlorophyll-a (algae): 6.2 µg/L.
- Clarity
- 2.1 m
- Type
- Mesotrophic
Lac Sainte-Marie is a mesotrophic lake in Antoine-Labelle County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 68 other monitored lakes in Antoine-Labelle County, Lac Sainte-Marie ranks #62 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 6.9 ft. Phosphorus level: 11.9 µg/L. Chlorophyll-a: 6.2 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.1 m | C |
| Phosphorus | 11.9 µg/L | A |
| Chlorophyll-a (Algae) | 6.2 µg/L | B |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Lac Sainte-Marie
Location
County Ranking
Ranked #62 of 69 lakes in Antoine-Labelle
Cleaner Lakes Within 30 Miles
Lac Sainte-Marie holds Grade B. 5 nearby lakes hold higher grades.
- ALac VertAntoine-Labelle · 5 mi · Higher grade (B → A)
- ALac BlancAntoine-Labelle · 5 mi · Higher grade (B → A)
- AGrand Lac NominingueAntoine-Labelle · 2.9 mi · Higher grade (B → A)
- APetit Lac NominingueAntoine-Labelle · 3.8 mi · Higher grade (B → A)
- ALac des Grandes BaiesAntoine-Labelle · 4 mi · Higher grade (B → A)
Nearby Lakes in Antoine-Labelle
Explore Lac Sainte-Marie 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 Sainte-Marie 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: