Argenteuil County, Québec · Water Quality Report Card
Lac Paul
Lac Paul in Argenteuil, Québec received a water quality grade of B (Good). Water clarity: 2.7 m visibility. Phosphorus: 11.1 µg/L. Chlorophyll-a (algae): 4.9 µg/L.
- Clarity
- 2.7 m
- Type
- Mesotrophic
Lac Paul is a mesotrophic lake in Argenteuil County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 47 other monitored lakes in Argenteuil County, Lac Paul ranks #27 for water quality.
Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2025-08-01. Grade methodology: LakeGrade methodology.
Watch Lac Paul water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 8.9 ft. Phosphorus level: 11.1 µg/L. Chlorophyll-a: 4.9 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.7 m | C |
| Phosphorus | 11.1 µg/L | A |
| Chlorophyll-a (Algae) | 4.9 µg/L | A |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lac Paul
Compare lakeside cabins, hotels, and vacation rentals near Lac Paul in Argenteuil, Québec — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Lac Paul
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Lac Paul?
Get lake water-quality report cards plus the best cabin & lodging deals near Lac Paul — straight to your inbox. No spam, unsubscribe anytime.
Fishing Lac Paul
Location
County Ranking
Ranked #27 of 48 lakes in Argenteuil
Nearby Lakes in Argenteuil
Explore Lac Paul 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 Paul 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: