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 23 Apr 2023: San Isidro 17.1 µg/m³, Las Palmas de Gran Canaria 16.3 µg/m³ and San Sebastián de la Gomera 15.5 µg/m³.
- 1San IsidroCanary Islands17.1
- 2Las Palmas de Gran CanariaCanary Islands16.3
- 3San Sebastián de la GomeraCanary Islands15.5
- 4La OrotavaCanary Islands13.9
- 5ArrecifeCanary Islands13.9
- 6Santa Cruz de TenerifeCanary Islands13.3
- 7VigoGalicia12.9
- 8GijónAsturias12.8
- 9OviedoAsturias12.7
- 10Puerto del RosarioCanary Islands12.4
- 11IngenioCanary Islands12.4
- 12Lomo de AricoCanary Islands12.0
- 13SamaAsturias11.7
- 14Granadilla de AbonaCanary Islands11.4
- 15La Línea de la ConcepciónAndalusia11.3
- 16ArucasCanary Islands11.2
- 17CandelariaCanary Islands11.0
- 18VecindarioCanary Islands10.7
- 19BailénAndalusia10.6
- 20AronaCanary Islands10.6
+ 68 more cities, 10.6 µg/m³ and below
Not counted on this day, too few days measured: Durango since 21 Apr 2023, Xàtiva since 13 Apr 2023, Puertollano since 30 Mar 2023 and 11 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.