Worst air pollution Plainpalais - Geneva, today and tomorrow

On 20 September 2026, overall air quality in Plainpalais is moderate. AQI is the main air quality indicator at 44.1/100. Pollution peaks around 8:00 AM (NO2: 44.1/100).

On 21 September 2026, air quality conditions in Plainpalais will be better than today, with AQI forecast at fair at 29.7/100. Pollution peaks around 5:00 PM (O3: 29.7/100).

On a rare still winter morning, vehicle traffic and international commuter activity at Plainpalais settle along the lake basin and linger, pushing readings to their worst point of the year. Once spring arrives, dispersion improves steadily, and summer stays largely clear except during rare heatwaves; autumn tends to be another comparatively mild, steady stretch.

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.