SmogRank / History / City race
Cities in Spain, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Spain for PM2.5 over the 30 days to 17 May 2025: Ourense 16.3 µg/m³, Mollet del Vallès 10.0 µg/m³ and Valencia 9.3 µg/m³.
- 1OurenseGalicia16.3
- 2Mollet del VallèsCatalonia10.0
- 3ValenciaValencia9.3
- 4MaspalomasCanary Islands9.3
- 5MurciaMurcia9.0
- 6San IsidroCanary Islands8.9
- 7San IldefonsoCastille and León8.7
- 8OviedoAsturias8.5
- 9AgüimesCanary Islands8.2
- 10VecindarioCanary Islands8.2
- 11Gasteiz / VitoriaBasque Country8.1
- 12El PlanMurcia7.9
- 13CartagenaMurcia7.9
- 14Barrio de PeralMurcia7.9
- 15AlcantarillaMurcia7.8
- 16TarragonaCatalonia7.8
- 17CandelariaCanary Islands7.7
- 18AmorebietaBasque Country7.7
- 19LorcaMurcia7.6
- 20SamaAsturias7.5
+ 52 more cities, the next at 7.5 µg/m³
Not counted on this day, too few days measured: San Roque since 17 May 2025, La Línea de la Concepción since 17 May 2025, Vilanova i la Geltrú since 17 May 2025 and 16 more cities.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.