Worst air pollution Cahill Expressway Lookout - Sydney, today and tomorrow

On 17 September 2026, overall air quality in Cahill Expressway Lookout is moderate. AQI is the main air quality indicator at 41.2/100. Pollution peaks around 11:00 PM (PM2.5: 41.2/100).

On 18 September 2026, air quality conditions in Cahill Expressway Lookout will be similar to today, with AQI forecast at moderate at 55.1/100. Pollution peaks around 8:00 PM (NO2: 55.1/100).

Winter months routinely see the year's steepest rise in particulate matter across this urban area, as reduced winter air mixing lets traffic and heating emissions accumulate close to the ground. Summer heat and dry conditions push bushfire smoke to the forefront of air quality concerns in this dense area, since bushfire smoke haze on affected days can dwarf the ozone increase that heat and traffic alone would produce.

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.