Matawinie County, Québec · Water Quality Report Card
Lac Sur la Montagne
Lac Sur la Montagne in Matawinie, Québec received a water quality grade of C (Fair). Water clarity: 2.1 m visibility.
- Clarity
- 2.1 m
- Type
- Mesotrophic
Lac Sur la Montagne is a mesotrophic lake in Matawinie County, Québec. Water quality is graded C based on 1 sampling years through 2025. Compared to the 111 other monitored lakes in Matawinie County, Lac Sur la Montagne ranks #111 for water quality.
Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2025-08-01. Grade methodology: LakeGrade methodology.
Watch Lac Sur la Montagne 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
Moderate clarity, visible to about 6.9 ft. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.1 m | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lac Sur la Montagne
Compare lakeside cabins, hotels, and vacation rentals near Lac Sur la Montagne in Matawinie, 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 Sur la Montagne
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 Sur la Montagne?
Get lake water-quality report cards plus the best cabin & lodging deals near Lac Sur la Montagne — straight to your inbox. No spam, unsubscribe anytime.
Fishing Lac Sur la Montagne
Location
County Ranking
Ranked #111 of 112 lakes in Matawinie
Cleaner Lakes Within 30 Miles
Lac Sur la Montagne holds Grade C. 5 nearby lakes hold higher grades.
- ALac ClairMatawinie · 1.7 mi · Two grade letters higher (C → A)
- ALac LaneMatawinie · 2.1 mi · Two grade letters higher (C → A)
- ALac à la TruiteMatawinie · 3.4 mi · Two grade letters higher (C → A)
- ALac JauneMatawinie · 1.3 mi · Two grade letters higher (C → A)
- ALac BrûLéMatawinie · 1.8 mi · Two grade letters higher (C → A)
Nearby Lakes in Matawinie
Explore Lac Sur la Montagne across LakeGrade
More Québec Lake Rankings
Other Grade C Lakes in Québec
Mesotrophic Lakes in Québec
More records, surveys & data sources
Where this data comes from
Measurements for Lac Sur la Montagne 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: