Worst air pollution Roseland - Chicago, today and tomorrow

On 9 August 2026, overall air quality in Roseland is fair. AQI is the main air quality indicator at 31.7/100. Pollution peaks around 10:00 AM (O3: 31.7/100).

On 10 August 2026, air quality conditions in Roseland will be similar to today, with AQI forecast at fair at 32.6/100. Pollution peaks around 12:00 PM (O3: 32.6/100).

Air quality often dips most sharply in winter in this urban setting, as heavy heating demand and traffic emissions combine under still, cold air that traps pollutants close to the ground. Warmer months bring a different problem here: ground-level ozone, as urban heat and sunlight combine with vehicle emissions, sometimes compounded by regional wildfire smoke.

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.