Worst air pollution Sept-Iles, today and tomorrow

On 9 August 2026, overall air quality in Sept-Iles is fair. AQI is the main air quality indicator at 38.3/100. Pollution peaks around 9:00 AM (O3: 38.3/100).

On 10 August 2026, air quality conditions in Sept-Iles will be better than today, with AQI forecast at good at 18.3/100. Pollution peaks around 8:00 AM (O3: 18.3/100).

In Sept-Iles, air quality changes through the year largely because of its iron-ore port on the remote Côte-Nord shore of the St. Lawrence. For much of the year the air is clean and forest-fresh, but summer and early autumn carry real risk of smoke episodes when wildfires burn nearby or further north. Because the population is small, local emissions rarely matter as much as what drifts in from distant fires.

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.