Lac-Saint-Jean-Est County, Québec · Water Quality Report Card
Lac Noir
Lac Noir in Lac-Saint-Jean-Est, Québec received a water quality grade of B (Good). Water clarity: 1.5 m visibility. Phosphorus: 9.5 µg/L. Chlorophyll-a (algae): 9 µg/L.
- Clarity
- 1.5 m
- Type
- Mesotrophic
Lac Noir is a mesotrophic lake in Lac-Saint-Jean-Est County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 15 other monitored lakes in Lac-Saint-Jean-Est County, Lac Noir ranks #16 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 4.8 ft. Phosphorus level: 9.5 µg/L. Chlorophyll-a: 9 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.45 m | D |
| Phosphorus | 9.5 µg/L | A |
| Chlorophyll-a (Algae) | 9 µg/L | B |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lac Noir
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Fishing Lac Noir
Location
County Ranking
Ranked #16 of 16 lakes in Lac-Saint-Jean-Est
Cleaner Lakes Within 30 Miles
Lac Noir holds Grade B. 5 nearby lakes hold higher grades.
- APetits Lacs BleusLac-Saint-Jean-Est · 3.1 mi · Higher grade (B → A)
- ALac à Ludovic-GauthierLac-Saint-Jean-Est · 3.2 mi · Higher grade (B → A)
- ALac ÉLie-GagnonLac-Saint-Jean-Est · 3.3 mi · Higher grade (B → A)
- ALac RichardLac-Saint-Jean-Est · 5.1 mi · Higher grade (B → A)
- ALac GarnierLac-Saint-Jean-Est · 1.5 mi · Higher grade (B → A)
Nearby Lakes in Lac-Saint-Jean-Est
Explore Lac Noir 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 Noir 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: