Worst air pollution La Cite-Limoilou - Quebec City, today and tomorrow
Today (16 July): Air quality in La Cite-Limoilou 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 La Cite-Limoilou 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.
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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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La Cité-Limoilou's air quality reflects Quebec City's dense historic core, with pedestrian zones limiting traffic in Old Quebec while surrounding streets and the Dufferin-Montmorency Expressway contribute emissions.
Today - 16 July | Pollution peaks at 06:00
AQI:
Medium
48.7/100
PM2.5 (fine particles):
Good
13.3/100
PM10 (coarse particles):
Good
4.8/100
NO2 (nitrogen dioxide):
Fair
22.3/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Good
15.5/100
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
8.8/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
19.3/100
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
10.7/100
Other Landmarks in Quebec City
Sports venues in Quebec City
Frequently Asked Questions
Is air quality bad in La Cite-Limoilou right now?
On 16 July 2026, overall air quality in La Cite-Limoilou is fair. NO2 is the main pollutant at 22.3/100. Pollution peaks around 6:00 AM (O3: 48.7/100).
Will air quality be worse tomorrow in La Cite-Limoilou?
On 17 July 2026, air quality conditions in La Cite-Limoilou 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 La Cite-Limoilou?
La Cité-Limoilou sees clear seasonal swings in air quality, driven in part by its historic clifftop old town overlooking the St. Lawrence River. 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. Its position along the St. Lawrence River tends to moderate the sharpest seasonal extremes.
Are air quality levels in La Cite-Limoilou 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.
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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