Mékinac County, Québec · Water Quality Report Card
Lac Pierre-Paul
Lac Pierre-Paul in Mékinac, Québec received a water quality grade of C (Fair). Water clarity: 1.8 m visibility. Phosphorus: 15.5 µg/L. Chlorophyll-a (algae): 12 µg/L.
- Clarity
- 1.8 m
- Type
- Eutrophic
Lac Pierre-Paul is a productive, nutrient-rich eutrophic lake in Mékinac County, Québec. Water quality is graded C based on 3 sampling years through 2025. Compared to the 24 other monitored lakes in Mékinac County, Lac Pierre-Paul ranks #24 for water quality.
Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2025-08-01. Grade methodology: LakeGrade methodology.
Watch Lac Pierre-Paul water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 5.9 ft. Phosphorus level: 15.5 µg/L. Chlorophyll-a: 12 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.8 m | D |
| Phosphorus | 15.5 µg/L | A |
| Chlorophyll-a (Algae) | 12 µg/L | C |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lac Pierre-Paul
Compare lakeside cabins, hotels, and vacation rentals near Lac Pierre-Paul in Mékinac, 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 Pierre-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 Pierre-Paul?
Get lake water-quality report cards plus the best cabin & lodging deals near Lac Pierre-Paul — straight to your inbox. No spam, unsubscribe anytime.
Fishing Lac Pierre-Paul
Location
County Ranking
Ranked #24 of 25 lakes in Mékinac
Cleaner Lakes Within 30 Miles
Lac Pierre-Paul holds Grade C. 5 nearby lakes hold higher grades.
- ALac TrottierMékinac · 2.6 mi · Two grade letters higher (C → A)
- ALac à la TruiteMékinac · 8 mi · Two grade letters higher (C → A)
- ALac à la PerchaudeMékinac · 2.5 mi · Two grade letters higher (C → A)
- ALac CrocheMékinac · 6.2 mi · Two grade letters higher (C → A)
- ALac ArchangeMékinac · 6.3 mi · Two grade letters higher (C → A)
Nearby Lakes in Mékinac
Explore Lac Pierre-Paul across LakeGrade
More Québec Lake Rankings
Other Grade C Lakes in Québec
Eutrophic Lakes in Québec
More records, surveys & data sources
Where this data comes from
Measurements for Lac Pierre-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: