Urban agglomeration of Québec County, Québec · Water Quality Report Card
Lac Saint-Augustin
Lac Saint-Augustin in Urban agglomeration of Québec, Québec received a water quality grade of D (Poor). Water clarity: 1.6 m visibility.
- Clarity
- 1.6 m
- Type
- Eutrophic
Lac Saint-Augustin is a productive, nutrient-rich eutrophic lake in Urban agglomeration of Québec County, Québec. Water quality is graded D based on 1 sampling years through 2025. Compared to the 2 other monitored lakes in Urban agglomeration of Québec County, Lac Saint-Augustin ranks #3 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
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 5.1 ft. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.55 m | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lac Saint-Augustin
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Fishing Lac Saint-Augustin
Location
County Ranking
Ranked #3 of 3 lakes in Urban agglomeration of Québec
Cleaner Lakes Within 30 Miles
Lac Saint-Augustin holds Grade D. 5 nearby lakes hold higher grades.
- ALac BeauportLa Jacques-Cartier · 15.2 mi · Two grade letters higher (D → A)
- ALac BonhommeUrban agglomeration of Québec · 8.4 mi · Two grade letters higher (D → A)
- ALac DelageLa Jacques-Cartier · 14.9 mi · Two grade letters higher (D → A)
- ALac Saint-JosephLa Jacques-Cartier · 17 mi · Two grade letters higher (D → A)
- ALac BleuLa Jacques-Cartier · 17.4 mi · Two grade letters higher (D → A)
Nearby Lakes in Urban agglomeration of Québec
Explore Lac Saint-Augustin across LakeGrade
More Québec Lake Rankings
Other Grade D Lakes in Québec
Eutrophic Lakes in Québec
More records, surveys & data sources
Where this data comes from
Measurements for Lac Saint-Augustin 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: