Air quality deterioration, at times significant, was another repercussion of the wildfires that erupted in several Mediterranean countries this past summer, according to data included in a recent analysis by the Meteo unit of the National Observatory of Athens.
The latter analyzed data from the Copernicus Atmosphere Monitoring Service (CAMS).
According to the findings from preliminary data, the areas with the greatest negative impact on air quality during the hottest days of 2025 were mainly on the Iberian Peninsula – i.e. Spain and Portugal – but also the Balkans, particularly in Greece.
Based on available data, the highest concentrations of PM10 particulate matter (with a diameter of less than 10 micrometers) were recorded in Spain, Portugal and Greece. These particles are directly linked to wildfires, as they are produced in large quantities during the combustion of biomass.