Le Rocher-Percé County, Québec · Water Quality Report Card
Lac des Sept ÎLes
Lac des Sept ÎLes in Le Rocher-Percé, Québec received a water quality grade of A (Excellent). Phosphorus: 3.8 µg/L. Chlorophyll-a (algae): 1 µg/L.
- Type
- Oligotrophic
Lac des Sept ÎLes is a cold, clear oligotrophic lake in Le Rocher-Percé County, Québec. Water quality is graded A based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Le Rocher-Percé County, Lac des Sept ÎLes ranks #1 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
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
No clarity data. Phosphorus level: 3.8 µg/L. Chlorophyll-a: 1 µg/L. Trophic State Index: 27.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 3.8 µg/L | A |
| Chlorophyll-a (Algae) | 1 µg/L | A |
| Trophic State Index (TSI) | 27 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
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Fishing Lac des Sept ÎLes
Location
County Ranking
Ranked #1 of 2 lakes in Le Rocher-Percé
Nearby Lakes in Le Rocher-Percé
Explore Lac des Sept ÎLes across LakeGrade
More Québec Lake Rankings
Other Grade A Lakes in Québec
Oligotrophic Lakes in Québec
More records, surveys & data sources
Where this data comes from
Measurements for Lac des Sept ÎLes 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: