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 26 Mar 2023: Bailén 14.5 µg/m³, Vigo 13.3 µg/m³ and Hernani 13.2 µg/m³.
- 1BailénAndalusia14.5
- 2VigoGalicia13.3
- 3HernaniBasque Country13.2
- 4GijónAsturias13.1
- 5OriaBasque Country12.5
- 6AmorebietaBasque Country12.5
- 7ValenciaValencia12.2
- 8OviedoAsturias12.0
- 9DurangoBasque Country11.7
- 10TorreviejaValencia10.7
- 11MarratxíBalearic Islands10.7
- 12BilbaoBasque Country10.5
- 13SamaAsturias10.4
- 14CuencaCastille-La Mancha10.4
- 15Laudio / LlodioBasque Country10.1
- 16CalahorraLa Rioja10.1
- 17LugoGalicia10.0
- 18San IsidroCanary Islands9.9
- 19Donostia / San SebastiánBasque Country9.8
- 20GetxoBasque Country9.6
+ 65 more cities, 9.5 µg/m³ and below
Not counted on this day, too few days measured: Cártama since 26 Mar 2023, Onda since 22 Mar 2023, Ribarroja del Turia since 16 Mar 2023 and 2 more cities. Days missing from the source archive fall in this window, so fewer countries are counted.
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.