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 to7 Aug 2026 That day's board

The worst cities in Spain for PM2.5 over the 30 days to 7 Aug 2026: Laudio / Llodio 11.4 µg/m³, Soria 10.3 µg/m³ and Oria 10.3 µg/m³.

  1. 1Laudio / LlodioBasque Country11.4
  2. 2SoriaCastille and León10.3
  3. 3OriaBasque Country10.3
  4. 4BeasainBasque Country10.3
  5. 5BilbaoBasque Country10.1
  6. 6Aranda de DueroCastille and León9.9
  7. 7AmorebietaBasque Country9.8
  8. 8BurgosCastille and León9.5
  9. 9Medina del CampoCastille and León9.3
  10. 10Donostia / San SebastiánBasque Country8.8
  11. 11SanturtziBasque Country8.7
  12. 12ZierbenaBasque Country8.7
  13. 13GetxoBasque Country8.4
  14. 14PalenciaCastille and León8.3
  15. 15LeónCastille and León8.1
  16. 16CandelariaCanary Islands7.7
  17. 17SalamancaCastille and León7.1
  18. 18BermeoBasque Country6.8
  19. 19ArrecifeCanary Islands6.1
  20. 20SamaAsturias5.3

Not counted on this day, too few days measured: Hernani since 7 Aug 2026, Zaragoza since 23 Jul 2026, Murcia since 22 Jul 2026 and 12 more cities.

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 readers for them. Most cities there are missing from this board, not clean. Why.