Bellechasse County, Québec · Water Quality Report Card
Lac Saint-Charles
Lac Saint-Charles in Bellechasse, Québec received a water quality grade of F (Very Poor). Water clarity: 0.3 m visibility. Phosphorus: 94.2 µg/L. Chlorophyll-a (algae): 69.7 µg/L.
- Clarity
- 0.3 m
- Type
- Hypereutrophic
Lac Saint-Charles is a highly nutrient-loaded hypereutrophic lake in Bellechasse County, Québec. Water quality is graded F based on 3 sampling years through 2025. Compared to the 8 other monitored lakes in Bellechasse County, Lac Saint-Charles ranks #9 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
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1 ft of visibility. Phosphorus level: 94.2 µg/L. Chlorophyll-a: 69.7 µg/L. Trophic State Index: 73.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.3 m | F |
| Phosphorus | 94.2 µg/L | F |
| Chlorophyll-a (Algae) | 69.7 µg/L | F |
| Trophic State Index (TSI) | 73 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
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Fishing Lac Saint-Charles
Location
County Ranking
Ranked #9 of 9 lakes in Bellechasse
Cleaner Lakes Within 30 Miles
Lac Saint-Charles holds Grade F. 5 nearby lakes hold higher grades.
- ALac BeauportLa Jacques-Cartier · 18.9 mi · Two grade letters higher (F → A)
- BLac la RetenueLa Côte-de-Beaupré · 15.2 mi · Two grade letters higher (F → B)
- BLac TourbillonLa Jacques-Cartier · 18.1 mi · Two grade letters higher (F → B)
- BLac Pierre-PaulBellechasse · 14.5 mi · Two grade letters higher (F → B)
- BLac DionBellechasse · 16.7 mi · Two grade letters higher (F → B)
Nearby Lakes in Bellechasse
Explore Lac Saint-Charles across LakeGrade
More Québec Lake Rankings
Other Grade F Lakes in Québec
Hypereutrophic Lakes in Québec
More records, surveys & data sources
Where this data comes from
Measurements for Lac Saint-Charles 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: