Worst air pollution Chicoutimi - Saguenay, today and tomorrow
Today (9 August): Air quality in Chicoutimi is fair. O3 is fair; AQI and NO2 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (NO2: 41.4/100).
Tomorrow (10 August 2026): Air quality in Chicoutimi is fair. AQI worsens to fair; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 27.8/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Chicoutimi's air quality benefits from its Saguenay River shoreline position, with river breezes providing reasonable ventilation across this downtown sector, though regional aluminum industry affects background levels.
Today - 9 August | Pollution peaks at 00:00
AQI:
Medium
41.4/100
PM2.5 (fine particles):
Good
17.1/100
PM10 (coarse particles):
Good
14.7/100
NO2 (nitrogen dioxide):
Medium
41.4/100
O3 (ozone):
Fair
31.0/100
SO2 (sulfur dioxide):
Good
8.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.0/100
PM1 (ultrafine particles):
Good
12.8/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 13:00
AQI:
Fair
27.8/100
PM2.5 (fine particles):
Good
9.2/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Fair
22.4/100
O3 (ozone):
Fair
27.8/100
SO2 (sulfur dioxide):
Good
6.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Good
6.8/100
Other Landmarks in Saguenay
Frequently Asked Questions
Is air quality bad in Chicoutimi right now?
On 9 August 2026, overall air quality in Chicoutimi is fair. O3 is the main pollutant at 31.0/100. Pollution peaks around 12:00 AM (NO2: 41.4/100).
Will air quality be worse tomorrow in Chicoutimi?
On 10 August 2026, air quality conditions in Chicoutimi will be similar to today, with AQI forecast at fair at 27.8/100. Pollution peaks around 1:00 PM (O3: 27.8/100).
When is air pollution at its worst in Chicoutimi?
The air over Chicoutimi varies through the year, influenced by its riverside downtown along the Saguenay River. Winters here typically bring the cleanest air of the year, but summer and early fall can bring sharp, sometimes prolonged drops in air quality when wildfire smoke drifts in from across the region. Wind direction across the river determines how much of the industrial output drifts into town on any given day.
Are air quality levels in Chicoutimi based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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