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 24 Feb 2023: Arrecife 28.2 µg/m³, Las Palmas de Gran Canaria 26.3 µg/m³ and Bailén 22.9 µg/m³.
- 1ArrecifeCanary Islands28.2
- 2Las Palmas de Gran CanariaCanary Islands26.3
- 3BailénAndalusia22.9
- 4VigoGalicia21.9
- 5MaspalomasCanary Islands20.5
- 6OviedoAsturias19.5
- 7LugoGalicia19.3
- 8Santa Cruz de TenerifeCanary Islands19.1
- 9SamaAsturias19.0
- 10GijónAsturias18.9
- 11ArucasCanary Islands18.5
- 12IngenioCanary Islands18.4
- 13ValenciaValencia18.0
- 14Puerto del RosarioCanary Islands17.8
- 15San IsidroCanary Islands17.7
- 16DurangoBasque Country17.2
- 17Gasteiz / VitoriaBasque Country17.1
- 18TorreviejaValencia17.0
- 19Laudio / LlodioBasque Country16.9
- 20ValdemoroMadrid16.7
+ 60 more cities, 16.5 µg/m³ and below
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.