Lac de Montigny
La Vallée-de-l'Or, QuébecView mapDirections
This is MELCCFP's own trophic classification for 2022, 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 de Montigny in La Vallée-de-l'Or, Québec is classified zone de transition méso-eutrophe by Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (Québec) for 2022. Water clarity: 0.6 m visibility. Phosphorus: 32.8 µg/L. Chlorophyll-a (algae): 6.5 µg/L.
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Lac de Montigny is a lake in La Vallée-de-l'Or County, Québec.
Source: Québec RSVL (MELCCFP) — not the EPA Water Quality Portal, last sampled 2022-08-01. Grade methodology: LakeQuality methodology.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lac de Montigny 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 de Montigny
These are the measurements MELCCFP publishes for Lac de Montigny, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2 ft of visibility. Phosphorus 32.8 µg/L. Chlorophyll-a 6.5 µg/L.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.6 m | Measured, not scored |
| Phosphorus | 32.8 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 6.5 µg/L | Measured, not scored |
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Frequently asked questions about Lac de Montigny
Where is Lac de Montigny?
- Lac de Montigny is a lake in La Vallée-de-l'Or, Québec. MELCCFP classifies it zone de transition méso-eutrophe for 2022. This is MELCCFP's own trophic classification for 2022, not a LakeQuality grade.
What is the water quality of Lac de Montigny?
- Lac de Montigny in La Vallée-de-l'Or, Québec is classified zone de transition méso-eutrophe by Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (Québec) for 2022. Water clarity: 0.6 m visibility. Phosphorus: 32.8 µg/L. Chlorophyll-a (algae): 6.5 µg/L.
Is Lac de Montigny 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 de Montigny. 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 2022, 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 (7 classified 2012–2022)
| Year | Published class |
|---|---|
| 2021 | zone de transition méso-eutrophe |
| 2020 | classe hyper-eutrophe |
| 2018 | classe hyper-eutrophe |
| 2017 | zone de transition méso-eutrophe |
| 2016 | zone de transition méso-eutrophe |
| 2012 | classe eutrophe |
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 de Montigny 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.