Worst air pollution Quatre Carreres - Valencia, today and tomorrow

On 19 July 2026, overall air quality in Quatre Carreres is fair. AQI is the main air quality indicator at 35.4/100. Pollution peaks around 1:00 PM (O3: 35.4/100).

On 20 July 2026, air quality conditions in Quatre Carreres will be similar to today, with AQI forecast at fair at 35.9/100. Pollution peaks around 7:00 PM (O3: 35.9/100).

How does air quality change throughout the year in Quatre Carreres? Air quality is typically at its weakest in December and January, when cold, calm high-pressure spells trap traffic exhaust and wood-smoke close to the ground instead of letting it disperse. March through May tends to see steady improvement, with more unsettled weather patterns helping disperse traffic and heating pollution. Hot, stagnant summer air favours ozone formation, and dry vegetation nearby occasionally adds wildfire smoke to the mix during peak heat. Early autumn can still bring warm, stagnant spells before the season's returning rain and wind begin clearing the air. Being on the Mediterranean coast helps with dispersal most of the year, though summer tourism and North African dust episodes remain a factor.

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.