Worst air pollution Mile One Centre - St. John's, today and tomorrow

On 9 August 2026, overall air quality in Mile One Centre is fair. AQI is the main air quality indicator at 37.8/100. Pollution peaks around 9:30 AM (O3: 37.8/100).

On 10 August 2026, air quality conditions in Mile One Centre will be similar to today, with AQI forecast at fair at 24.8/100. Pollution peaks around 2:30 PM (O3: 24.8/100).

Mile One Centre's air quality shifts with the calendar, largely because of its downtown St. John's setting, busiest during event nights. Persistent fog and near-constant Atlantic winds keep the air unusually clean through most of the year, with only rare still spells allowing local emissions to linger. Storm systems roll through often enough that pollution seldom has time to build up.

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.