Portneuf County, Québec · Water Quality Report Card
Lac Simon
Lac Simon in Portneuf, Québec received a water quality grade of A (Excellent). Water clarity: 4.2 m visibility. Phosphorus: 3.5 µg/L. Chlorophyll-a (algae): 1.3 µg/L.
- Clarity
- 4.2 m
- Type
- Oligotrophic
Lac Simon is a cold, clear oligotrophic lake in Portneuf County, Québec. Water quality is graded A based on 3 sampling years through 2025. Compared to the 22 other monitored lakes in Portneuf County, Lac Simon ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2025-08-01. Grade methodology: LakeGrade methodology.
Watch Lac Simon water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 13.8 ft. Phosphorus level: 3.5 µg/L. Chlorophyll-a: 1.3 µg/L. Trophic State Index: 32.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.2 m | B |
| Phosphorus | 3.5 µg/L | A |
| Chlorophyll-a (Algae) | 1.3 µg/L | A |
| Trophic State Index (TSI) | 32 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Lac Simon
Compare lakeside cabins, hotels, and vacation rentals near Lac Simon in Portneuf, 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 Simon
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 Simon?
Get lake water-quality report cards plus the best cabin & lodging deals near Lac Simon — straight to your inbox. No spam, unsubscribe anytime.
Fishing Lac Simon
Location
County Ranking
Ranked #6 of 23 lakes in Portneuf
Nearby Lakes in Portneuf
Explore Lac Simon 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 Simon 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: