Lac de L'Achigan
La Rivière-du-Nord, QuébecView mapDirections
This is MELCCFP's own trophic classification for 2025, not a LakeQuality grade. See every year
- 58 ft max depth
Lac de L'Achigan in La Rivière-du-Nord, Québec is classified zone de transition oligo-mésotrophe by Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (Québec) for 2025. Water clarity: 5 m visibility. Phosphorus: 3.9 µg/L. Chlorophyll-a (algae): 2.1 µg/L.
Stays via Stay22
Stays near Lac de L'Achigan
Compare lakeside cabins, hotels, and vacation rentals near Lac de L'Achigan in La Rivière-du-Nord, 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 de L'Achigan
Prices for Sep 18–20, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow Lac de L'Achigan’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Lac de L'Achigan is a lake in La Rivière-du-Nord County, Québec with an estimated average depth of about 58 feet.
Source: Québec RSVL (MELCCFP) — not the EPA Water Quality Portal, last sampled 2025-08-01. Grade methodology: LakeQuality methodology.
What Lac de L'Achigan is good for
From access and monitoring records, not editorial picks.
- Clear water16.4 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 de L'Achigan 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 L'Achigan
These are the measurements MELCCFP publishes for Lac de L'Achigan, 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 16.4 ft down. Phosphorus 3.9 µg/L. Chlorophyll-a 2.1 µg/L.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 m | Measured, not scored |
| Phosphorus | 3.9 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 2.1 µg/L | Measured, not scored |
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~17.7 m est. |
| Average Depth | ~15.8 m est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Québec has not published bathymetry for Lac de L'Achigan.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Lac de L'Achigan
Nearby Lakes in La Rivière-du-Nord
Frequently asked questions about Lac de L'Achigan
Ask about Lac de L'Achigan
Answers come straight from the public measurements and survey records on this page.
Where is Lac de L'Achigan?
- Lac de L'Achigan is a lake in La Rivière-du-Nord, Québec. MELCCFP classifies it zone de transition oligo-mésotrophe for 2025. This is MELCCFP's own trophic classification for 2025, not a LakeQuality grade.
What is the water quality of Lac de L'Achigan?
- Lac de L'Achigan in La Rivière-du-Nord, Québec is classified zone de transition oligo-mésotrophe by Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (Québec) for 2025. Water clarity: 5 m visibility. Phosphorus: 3.9 µg/L. Chlorophyll-a (algae): 2.1 µg/L.
Is Lac de L'Achigan safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lac de L'Achigan?
- No published bathymetric survey covers Lac de L'Achigan, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 58 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Lac de L'Achigan across LakeQuality
More lakes in Québec
Other Lakes in Québec
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 L'Achigan. 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 (16 classified 2014–2025)
| Year | Published class |
|---|---|
| 2024 | zone de transition oligo-mésotrophe |
| 2023 | zone de transition oligo-mésotrophe |
| 2022 | zone de transition oligo-mésotrophe |
| 2021 | zone de transition oligo-mésotrophe |
| 2020 | zone de transition oligo-mésotrophe |
| 2019 | zone de transition oligo-mésotrophe |
| 2018 | zone de transition oligo-mésotrophe |
| 2017 | zone de transition oligo-mésotrophe |
| 2016 | zone de transition oligo-mésotrophe |
| 2015 | zone de transition oligo-mésotrophe |
| 2014 | classe mésotrophe |
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 L'Achigan 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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)