Worst air pollution Collingwood, today and tomorrow

On 9 August 2026, overall air quality in Collingwood is medium. AQI is the main air quality indicator at 40.9/100. Pollution peaks around 9:00 AM (O3: 40.9/100).

On 10 August 2026, air quality conditions in Collingwood will be worse than today, with AQI forecast at fair at 34.0/100. Pollution peaks around 11:00 AM (O3: 34.0/100).

Collingwood's air quality follows a seasonal rhythm tied to its Georgian Bay shoreline in the heart of Ontario's snowbelt. Winter brings heavy lake-effect snow off Georgian Bay or Lake Huron, which can temporarily reduce visibility, while summer air is generally clean apart from occasional haze on hot, humid days. Air pollution levels themselves stay comparatively low year-round, even when the weather itself turns severe.

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.