Worst air pollution Château-Gontier, today and tomorrow

On 21 July 2026, overall air quality in Château-Gontier is fair. AQI is the main air quality indicator at 30.5/100. Pollution peaks around 5:00 PM (O3: 30.5/100).

On 22 July 2026, air quality conditions in Château-Gontier will be similar to today, with AQI forecast at fair at 29.0/100. Pollution peaks around 8:00 PM (O3: 29.0/100).

For people sensitive to both pollen and pollution in Château-Gontier, spring days combining river-port traffic and light industry with the oak and plane peak are the ones to watch; the Loire estuary and Atlantic winds ventilate the area, which tends to clear things fairly quickly. The presence of Loire valley and Vendee farmland 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.