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 8 Dec 2025: Manlleu 26.7 µg/m³, Ourense 21.9 µg/m³ and Mollet del Vallès 14.9 µg/m³.
- 1ManlleuCatalonia26.7
- 2OurenseGalicia21.9
- 3Mollet del VallèsCatalonia14.9
- 4Collado-VillalbaMadrid13.2
- 5LleidaCatalonia12.8
- 6GironaCatalonia11.6
- 7ArucasCanary Islands11.4
- 8MurciaMurcia11.3
- 9San IsidroCanary Islands11.2
- 10GijónAsturias10.7
- 11Molina de SeguraMurcia10.0
- 12PalenciaCastille and León9.9
- 13San Sebastián de la GomeraCanary Islands9.7
- 14Las Palmas de Gran CanariaCanary Islands9.6
- 15SamaAsturias9.6
- 16Santa Cruz de TenerifeCanary Islands9.2
- 17SalamancaCastille and León8.4
- 18BeasainBasque Country8.4
- 19AlcantarillaMurcia8.2
- 20El PlanMurcia8.1
+ 70 more cities, 8.1 µg/m³ and below
Not counted on this day, too few days measured: Logroño since 3 Dec 2025, Santa Lucía since 2 Dec 2025, Maspalomas since 2 Dec 2025 and 5 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.