Worst air pollution Santa Eulalia del Río, today and tomorrow

On 9 August 2026, overall air quality in Santa Eulalia del Río is fair. AQI is the main air quality indicator at 38.6/100. Pollution peaks around 11:00 PM (O3: 38.6/100).

On 10 August 2026, air quality conditions in Santa Eulalia del Río will be better than today, with AQI forecast at medium at 49.8/100. Pollution peaks around 4:00 PM (O3: 49.8/100).

How do the seasons affect air quality in Santa Eulalia del Río? The year's lowest air quality readings tend to cluster in winter, when high-pressure systems suppress the mixing that would otherwise clear away exhaust and smoke. The transition into spring usually brings cleaner air, as more frequent rain and wind reduce the buildup of local pollution. The long, hot days of summer favour ozone build-up, which can spike on the stillest, sunniest afternoons. As autumn progresses, cooler temperatures and more frequent rain tend to bring air quality back toward its yearly average. Coastal sea breezes here usually aid dispersal, but summer visitor traffic and periodic dust intrusions from North Africa can still cause spikes.

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.