Worst air pollution Chestnut Wood Village - Philadelphia, today and tomorrow

On 20 September 2026, overall air quality in Chestnut Wood Village is fair. AQI is the main air quality indicator at 26.9/100. Pollution peaks around 2:00 PM (PM2.5: 26.9/100).

On 21 September 2026, air quality conditions in Chestnut Wood Village will be similar to today, with AQI forecast at fair at 24.1/100. Pollution peaks around 12:00 PM (O3: 24.1/100).

The colder months typically bring the heaviest particulate levels of the year to this area, as cold, stagnant air traps heating and traffic emissions close to street level through the winter. The warmer months shift the main air quality risk here toward ground-level ozone, as intense summer sunlight bakes traffic emissions into ground-level ozone across the urban core.

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.