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 6 Sep 2026: Alcalá de Guadaira 19.8 µg/m³, Huelva 18.1 µg/m³ and Sevilla 16.3 µg/m³.
- 1Alcalá de GuadairaAndalusia19.8
- 2HuelvaAndalusia18.1
- 3SevillaAndalusia16.3
- 4ManlleuCatalonia14.3
- 5JumillaMurcia13.0
- 6AlcantarillaMurcia12.9
- 7MurciaMurcia12.4
- 8El PlanMurcia12.3
- 9Barrio de PeralMurcia12.3
- 10ManzanaresCastille-La Mancha12.0
- 11Torrejón de ArdozMadrid12.0
- 12BailénAndalusia11.9
- 13MadridMadrid11.9
- 14San IldefonsoCastille and León11.8
- 15CaravacaMurcia11.5
- 16San RoqueAndalusia11.3
- 17La Línea de la ConcepciónAndalusia11.1
- 18Gasteiz / VitoriaBasque Country11.1
- 19ZallaBasque Country11.0
- 20Alcalá de HenaresMadrid11.0
+ 31 more cities, 10.9 µg/m³ and below
Not counted on this day, too few days measured: Gijón since 6 Sep 2026, Cártama since 1 Sep 2026, A Coruña since 31 Aug 2026 and 13 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 readers for them. Most cities there are missing from this board, not clean. Why.