Les Laurentides County, Québec · Water Quality Report Card
Lac de L'Orignal
Lac de L'Orignal in Les Laurentides, Québec received a water quality grade of B (Good). Water clarity: 2.9 m visibility. Phosphorus: 12.7 µg/L. Chlorophyll-a (algae): 5.2 µg/L.
- Clarity
- 2.9 m
- Type
- Mesotrophic
Lac de L'Orignal is a mesotrophic lake in Les Laurentides County, Québec. Water quality is graded B based on 3 sampling years through 2024. Compared to the 118 other monitored lakes in Les Laurentides County, Lac de L'Orignal ranks #101 for water quality.
Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2024-08-01. 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 9.4 ft. Phosphorus level: 12.7 µg/L. Chlorophyll-a: 5.2 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.85 m | C |
| Phosphorus | 12.7 µg/L | A |
| Chlorophyll-a (Algae) | 5.2 µg/L | B |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Lac de L'Orignal
Location
County Ranking
Ranked #101 of 119 lakes in Les Laurentides
Cleaner Lakes Within 30 Miles
Lac de L'Orignal holds Grade B. 5 nearby lakes hold higher grades.
- ALac JosephLes Laurentides · 2.7 mi · Higher grade (B → A)
- ALac de la Montagne NoireLes Laurentides · 2.7 mi · Higher grade (B → A)
- ALac BoeufMatawinie · 3 mi · Higher grade (B → A)
- ALac du RocherLes Laurentides · 1.7 mi · Higher grade (B → A)
- BPetit Lac de L'OrignalLes Laurentides · 0.8 mi · Higher overall water quality score
Nearby Lakes in Les Laurentides
Explore Lac de L'Orignal 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 de L'Orignal 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: 2024-08-01
Monitoring stations: