Ferran Puig ring road registered in 2025 the highest average concentration of nitrogen dioxide in Girona, with 39 µg/m³, according to the air quality study prepared by 4sfera Innova commissioned by the City Council. The report also notes a general rebound of this pollutant in the city, which has gone from an average of 25.9 µg/m³ in 2024 to 27.2 µg/m³ in 2025.
The points with most traffic load concentrate the worst data
After the Ferran Puig ring road, the highest values have been measured on Barcelona road, with 37 µg/m³, on Riu Güell street, with 36 µg/m³, and on Jaume I avenue, with 34 µg/m³. Also among the sections with the highest concentration is Barcelona road at the height of La Bolera, with 33 µg/m³.
The study reflects that transit points located less than ten meters from a road with motorized traffic reached an average of 28.9 µg/m³ in 2025, above the 27.5 µg/m³ recorded the previous year. Background pollution also rises, that which is measured in areas far from major roads, which goes from 17 µg/m³ in 2024 to 18 µg/m³ in 2025.
Girona remains within the current limit, but by little in some sections
The current European regulation sets an annual limit of 40 µg/m³ for nitrogen dioxide. The Ferran Puig ring road is just one point away from that threshold. The scenario will change starting in 2030, when the new directive will lower the limit to 20 µg/m³, a level that already excludes several of the main road axes analyzed.
Measures underway and planned changes in Ferran Puig
The City Council is deploying different actions to reduce pollution linked to traffic. Among them are the implementation of the Low Emission Zone, the expansion of the Girocleta service, and the improvement of the frequency of urban buses.
In the specific case of the Ferran Puig ring road, the study proposes short-term measures. The proposal involves prohibiting the northbound direction towards La Devesa, creating a bidirectional bike lane and reorganizing traffic with changes of direction in adjacent streets.
The report thus draws a clear map of the most stressed points in Girona and places traffic as the main focus of concern in the recent evolution of air quality, with special pressure on the road corridors of the center and its immediate surroundings.