L'Islet County, Québec · Water Quality Report Card
Lac D'Apic
Lac D'Apic in L'Islet, Québec received a water quality grade of B (Good). Water clarity: 1.6 m visibility. Phosphorus: 10.8 µg/L. Chlorophyll-a (algae): 4.5 µg/L.
- Clarity
- 1.6 m
- Type
- Mesotrophic
Lac D'Apic is a mesotrophic lake in L'Islet County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 5 other monitored lakes in L'Islet County, Lac D'Apic 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
Murky, only visible to about 5.2 ft. Phosphorus level: 10.8 µg/L. Chlorophyll-a: 4.5 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 m | D |
| Phosphorus | 10.8 µg/L | A |
| Chlorophyll-a (Algae) | 4.5 µg/L | A |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Lac D'Apic
Location
County Ranking
Ranked #4 of 6 lakes in L'Islet
Cleaner Lakes Within 30 Miles
Lac D'Apic holds Grade B. 5 nearby lakes hold higher grades.
- ALac Fontaine ClaireL'Islet · 1.6 mi · Higher grade (B → A)
- ALac BringéL'Islet · 14 mi · Higher grade (B → A)
- BLac JallyMontmagny · 11.4 mi · Higher overall water quality score
- BLac Trois SaumonsL'Islet · 15.7 mi · Higher overall water quality score
- BLac MaillouxBellechasse · 21.4 mi · Higher overall water quality score
Nearby Lakes in L'Islet
Explore Lac D'Apic 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 D'Apic 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: