Lac Grenon
La Vallée-de-la-Gatineau, QuébecView mapDirections
This is MELCCFP's own trophic classification for 2025, not a LakeQuality grade. See every year
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Answers come straight from the public measurements and survey records on this page.
Lac Grenon in La Vallée-de-la-Gatineau, 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: 6.1 m visibility. Phosphorus: 6.4 µg/L. Chlorophyll-a (algae): 1.2 µg/L.
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Lac Grenon is a lake in La Vallée-de-la-Gatineau County, Québec.
Source: Québec RSVL (MELCCFP) — not the EPA Water Quality Portal, last sampled 2025-08-01. Grade methodology: LakeQuality methodology.
What Lac Grenon is good for
From access and monitoring records, not editorial picks.
- Clear water19.8 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 Grenon 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 Grenon
These are the measurements MELCCFP publishes for Lac Grenon, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 19.8 ft down. Phosphorus 6.4 µg/L. Chlorophyll-a 1.2 µg/L.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.05 m | Measured, not scored |
| Phosphorus | 6.4 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 1.2 µg/L | Measured, not scored |
Fishing Lac Grenon
Nearby Lakes in La Vallée-de-la-Gatineau
Frequently asked questions about Lac Grenon
Where is Lac Grenon?
- Lac Grenon is a lake in La Vallée-de-la-Gatineau, 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 Grenon?
- Lac Grenon in La Vallée-de-la-Gatineau, 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: 6.1 m visibility. Phosphorus: 6.4 µg/L. Chlorophyll-a (algae): 1.2 µg/L.
Is Lac Grenon 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 Grenon. 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 (10 classified 2015–2025)
| Year | Published class |
|---|---|
| 2024 | zone de transition oligo-mésotrophe |
| 2023 | classe oligotrophe |
| 2022 | classe oligotrophe |
| 2021 | classe oligotrophe |
| 2020 | classe oligotrophe |
| 2018 | zone de transition oligo-mésotrophe |
| 2017 | classe oligotrophe |
| 2016 | zone de transition oligo-mésotrophe |
| 2015 | 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 Grenon 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.