Lac des Roches
Les Pays-d'en-Haut, QuébecView mapDirections
This is MELCCFP's own trophic classification for 2025, not a LakeQuality grade. See every year
Lac des Roches in Les Pays-d'en-Haut, Québec is classified classe oligotrophe by Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (Québec) for 2025. Water clarity: 4 m visibility. Phosphorus: 6 µg/L. Chlorophyll-a (algae): 2.4 µg/L.
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Lac des Roches is a lake in Les Pays-d'en-Haut County, Québec.
Source: Québec RSVL (MELCCFP) — not the EPA Water Quality Portal, last sampled 2025-08-01. Grade methodology: LakeQuality methodology.
What Lac des Roches is good for
From access and monitoring records, not editorial picks.
- Clear water13.1 ft of visibility
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lac des Roches is safe to swim in today is a call for le Ministère de l'Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lac des Roches
These are the measurements MELCCFP publishes for Lac des Roches, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 13.1 ft. Phosphorus 6 µg/L. Chlorophyll-a 2.4 µg/L.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 4 m | Measured, not scored |
| Phosphorus | 6 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 2.4 µg/L | Measured, not scored |
Fishing Lac des Roches
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Frequently asked questions about Lac des Roches
Ask about Lac des Roches
Answers come straight from the public measurements and survey records on this page.
Where is Lac des Roches?
- Lac des Roches is a lake in Les Pays-d'en-Haut, Québec. MELCCFP classifies it classe oligotrophe for 2025. This is MELCCFP's own trophic classification for 2025, not a LakeQuality grade.
What is the water quality of Lac des Roches?
- Lac des Roches in Les Pays-d'en-Haut, Québec is classified classe oligotrophe by Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (Québec) for 2025. Water clarity: 4 m visibility. Phosphorus: 6 µg/L. Chlorophyll-a (algae): 2.4 µg/L.
Is Lac des Roches safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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The authority’s own classification
Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (Québec) publishes its own classification for Lac des Roches. It is shown here as theirs, in their words, and is not folded into the LakeQuality letter.
This is MELCCFP's own trophic classification for 2025, not a LakeQuality grade.
A trophic class ranks how nutrient-rich a lake is, from oligotrophic at the low end to eutrophic at the high end. It describes nutrients and plant growth, not bacteria, and it is not a swimming clearance.
Earlier years (3 classified 2023–2025)
| Year | Published class |
|---|---|
| 2024 | zone de transition oligo-mésotrophe |
| 2023 | classe oligotrophe |
Published by Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (Québec). A classification is not a same-day swimming clearance. See data sources.
Where this data comes from
Measurements for Lac des Roches come from the Réseau de surveillance volontaire des lacs (RSVL), not the EPA Water Quality Portal. Per-sample source details are not recorded for this lake. MELCCFP RSVL (CC BY 4.0). See data sources.