Charlevoix-Est County, Québec · Water Quality Report Card
Lac Nairne
Lac Nairne in Charlevoix-Est, Québec received a water quality grade of B (Good). Water clarity: 3.3 m visibility. Phosphorus: 11 µg/L. Chlorophyll-a (algae): 5.2 µg/L.
- Clarity
- 3.3 m
- Type
- Mesotrophic
Lac Nairne is a mesotrophic lake in Charlevoix-Est County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 4 other monitored lakes in Charlevoix-Est County, Lac Nairne 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
Good clarity, visible to about 10.8 ft. Phosphorus level: 11 µg/L. Chlorophyll-a: 5.2 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 m | B |
| Phosphorus | 11 µg/L | A |
| Chlorophyll-a (Algae) | 5.2 µg/L | B |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lac Nairne
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Fishing Lac Nairne
Location
County Ranking
Ranked #4 of 5 lakes in Charlevoix-Est
Cleaner Lakes Within 30 Miles
Lac Nairne holds Grade B. 4 nearby lakes hold higher grades.
- ALac du Pied des MontsCharlevoix-Est · 5.7 mi · Higher grade (B → A)
- ALac des Bois VertsCharlevoix · 17.7 mi · Higher grade (B → A)
- ALac DeschêNesCharlevoix-Est · 23.2 mi · Higher grade (B → A)
- ALac NoirCharlevoix-Est · 14.8 mi · Higher grade (B → A)
Nearby Lakes in Charlevoix-Est
Explore Lac Nairne 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 Nairne 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: