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 10 Aug 2026: Laudio / Llodio 10.5 µg/m³, Gasteiz / Vitoria 10.3 µg/m³ and Oria 9.8 µg/m³.
- 1Laudio / LlodioBasque Country10.5
- 2Gasteiz / VitoriaBasque Country10.3
- 3OriaBasque Country9.8
- 4BeasainBasque Country9.8
- 5BilbaoBasque Country9.5
- 6AmorebietaBasque Country9.2
- 7Donostia / San SebastiánBasque Country8.2
- 8CandelariaCanary Islands8.1
- 9GetxoBasque Country8.0
- 10SanturtziBasque Country7.8
- 11ZierbenaBasque Country7.8
- 12BermeoBasque Country6.2
- 13ArrecifeCanary Islands6.0
- 14SamaAsturias5.0
Not counted on this day, too few days measured: Soria since 8 Aug 2026, Salamanca since 8 Aug 2026, Palencia since 8 Aug 2026 and 19 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.