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 to4 Oct 2026 That day's board

The worst cities in Spain for PM2.5 over the 30 days to 4 Oct 2026: Alcalá de Guadaira 17.0 µg/m³, Sevilla 15.1 µg/m³ and Huelva 14.6 µg/m³.

  1. 1Alcalá de GuadairaAndalusia17.0
  2. 2SevillaAndalusia15.1
  3. 3HuelvaAndalusia14.6
  4. 4ArrecifeCanary Islands13.6
  5. 5CandelariaCanary Islands12.6
  6. 6ManlleuCatalonia12.3
  7. 7FuenlabradaMadrid11.4
  8. 8GijónAsturias10.9
  9. 9VigoGalicia10.4
  10. 10AvilésAsturias10.4
  11. 11MurciaMurcia10.3
  12. 12El PlanMurcia10.3
  13. 13Barrio de PeralMurcia10.3
  14. 14AlcantarillaMurcia10.2
  15. 15DurangoBasque Country10.0
  16. 16BurrianaValencia9.9
  17. 17A CoruñaGalicia9.9
  18. 18Gasteiz / VitoriaBasque Country9.8
  19. 19Torrejón de ArdozMadrid9.7
  20. 20San RoqueAndalusia9.6

+ 56 more cities, 9.6 µg/m³ and below

Not counted on this day, too few days measured: Valdemoro since 3 Oct 2026, Ourense since 3 Oct 2026, Bailén since 2 Oct 2026 and 10 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.