Worst air pollution Béthune, today and tomorrow

On 20 September 2026, overall air quality in Béthune is fair. AQI is the main air quality indicator at 29.1/100. Pollution peaks around 11:00 PM (PM2.5: 29.1/100).

On 21 September 2026, air quality conditions in Béthune will be similar to today, with AQI forecast at fair at 39.6/100. Pollution peaks around 4:00 AM (PM2.5: 39.6/100).

The days that hit sensitive groups hardest in Béthune are calm spring ones, when former coalfield industry and motorway traffic and the birch and oak pollen peak overlap; North Sea winds sweep across the open plains, so relief usually isn't far behind. The presence of Picardy and Artois arable plains in the area adds another layer to the local pattern.

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.