Worst air pollution Canyon Sainte-Anne - Quebec City, today and tomorrow

On 9 August 2026, overall air quality in Canyon Sainte-Anne is fair. O3 is the main pollutant at 38.0/100. Pollution peaks around 1:00 AM (NO2: 40.0/100).

On 10 August 2026, air quality conditions in Canyon Sainte-Anne will be similar to today, with AQI forecast at fair at 27.3/100. Pollution peaks around 10:00 AM (O3: 27.3/100).

Air quality at Canyon Sainte-Anne shifts noticeably across the seasons, shaped by its forested gorge east of Quebec City. 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. As a part of the old capital region, it shares much of downtown Quebec City's broad seasonal pattern.

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.

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.