Abitibi County, Québec · Water Quality Report Card
Lac Preissac
Lac Preissac in Abitibi, Québec received a water quality grade of B (Good). Water clarity: 1.4 m visibility. Phosphorus: 17.3 µg/L. Chlorophyll-a (algae): 3.1 µg/L.
- Clarity
- 1.4 m
- Type
- Mesotrophic
Lac Preissac is a mesotrophic lake in Abitibi County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 6 other monitored lakes in Abitibi County, Lac Preissac ranks #4 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 4.4 ft. Phosphorus level: 17.3 µg/L. Chlorophyll-a: 3.1 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.35 m | D |
| Phosphorus | 17.3 µg/L | A |
| Chlorophyll-a (Algae) | 3.1 µg/L | A |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Lac Preissac
Location
County Ranking
Ranked #4 of 7 lakes in Abitibi
Cleaner Lakes Within 30 Miles
Lac Preissac holds Grade B. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Abitibi
Explore Lac Preissac 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 Preissac 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: