Worst air pollution Sarrià-Sant Gervasi - Barcelona, today and tomorrow

On 19 July 2026, overall air quality in Sarrià-Sant Gervasi is fair. PM2.5 is the main pollutant at 26.8/100. Pollution peaks around 3:00 PM (O3: 54.5/100).

On 20 July 2026, air quality conditions in Sarrià-Sant Gervasi will be similar to today, with NO2 forecast at fair at 22.5/100. Pollution peaks around 2:00 PM (O3: 58.6/100).

How does air quality change throughout the year in Sarrià-Sant Gervasi? Winter tends to bring the year's weakest readings, as stagnant, cold air lets heating smoke and vehicle emissions build up rather than clear away. Conditions generally start to recover in spring, as increasing wind and rainfall break up the stagnant air masses typical of winter. The heat of summer drives up ozone formation, and dry conditions occasionally bring smoke from regional wildfires into the mix. Air quality usually improves through autumn, as returning rains and cooling temperatures wash out summer's ozone and dust build-up. The mild, breezy Mediterranean climate generally supports good dispersal, though summer crowds and Saharan dust intrusions can occasionally push levels higher.

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.