Worst air pollution Sillery - Quebec City, today and tomorrow
Today (16 July): Air quality in Sillery is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (O3: 48.7/100).
Tomorrow (17 July 2026): Air quality in Sillery is fair. AQI worsens to fair; NO2 decreases to good; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 34.1/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Sillery's air quality benefits from its St. Lawrence riverside cliff position, with river breezes providing reliable ventilation across this affluent western Quebec City district.
Today - 16 July | Pollution peaks at 06:00
AQI:
Medium
48.7/100
PM2.5 (fine particles):
Good
13.1/100
PM10 (coarse particles):
Good
4.8/100
NO2 (nitrogen dioxide):
Fair
21.6/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Good
15.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 11:00
AQI:
Fair
34.1/100
PM2.5 (fine particles):
Good
8.7/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
18.5/100
O3 (ozone):
Fair
34.1/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
10.6/100
Other Landmarks in Quebec City
Sports venues in Quebec City
Frequently Asked Questions
Is air quality bad in Sillery right now?
On 16 July 2026, overall air quality in Sillery is fair. NO2 is the main pollutant at 21.6/100. Pollution peaks around 6:00 AM (O3: 48.7/100).
Will air quality be worse tomorrow in Sillery?
On 17 July 2026, air quality conditions in Sillery will be similar to today, with AQI forecast at fair at 34.1/100. Pollution peaks around 11:00 AM (O3: 34.1/100).
When is air pollution at its worst in Sillery?
Sillery sees clear seasonal swings in air quality, driven in part by its leafy clifftop streets overlooking the St. Lawrence. The warmest months typically see the poorest air quality, with heat and heavy traffic driving up smog levels on windless days, whereas fall and winter tend to bring cleaner, more variable conditions. Breezes off the St. Lawrence River help disperse pollutants more quickly here than in inland areas.
Are air quality levels in Sillery 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.
Check air quality in other popular cities:
Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app