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.

CountriesCities
The 30 days to17 Apr 2025 That day's board

The worst cities in Spain for PM2.5 over the 30 days to 17 Apr 2025: Ourense 16.9 µg/m³, Valencia 13.8 µg/m³ and Mollet del Vallès 13.7 µg/m³.

  1. 1OurenseGalicia16.9
  2. 2ValenciaValencia13.8
  3. 3Mollet del VallèsCatalonia13.7
  4. 4OriaBasque Country11.7
  5. 5MurciaMurcia11.6
  6. 6SamaAsturias11.1
  7. 7CartagenaMurcia10.9
  8. 8San IldefonsoCastille and León10.8
  9. 9Alcalá de GuadairaAndalusia10.7
  10. 10TarragonaCatalonia10.7
  11. 11BarcelonaCatalonia10.6
  12. 12Molina de SeguraMurcia10.5
  13. 13El PlanMurcia10.4
  14. 14Barrio de PeralMurcia10.4
  15. 15AlcantarillaMurcia10.2
  16. 16GijónAsturias10.2
  17. 17SaguntoValencia10.0
  18. 18OviedoAsturias10.0
  19. 19CandelariaCanary Islands9.7
  20. 20San RoqueAndalusia9.5

+ 105 more cities, the next at 9.5 µg/m³

Not counted on this day, too few days measured: Bailén since 21 Feb 2025.

30 days7 days
GoodModerateSensitive groupsUnhealthyVery unhealthyHazardousWHO 24-hour guideline, 15 µg/m³Fades where it stood: not counted that 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.