SmogRank / World / Europe / Spain / Basque Country
Most polluted cities in Basque Country, Spain
No city in Basque Country, Spain has enough readings to rank so far this year.
26 monitors in Spain stopped reporting on 6 Oct, 05:00 Madrid time. Cities that rely on them are missing from the 24-hour board and may drop from the longer ones; that isn't clean air, and they return when the data does.
A city joins this ranking with enough days of readings so far this year; none here has that right now, so there is nothing to map or chart.
Last 24 hours: 1 measured city · Last 30 days: 15 measured cities
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Estimated: cities without a monitor
Basque Country cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Barakaldo | ≈ 9 µg/m³ |
| Irun | ≈ 5 µg/m³ |
| Santutxu | ≈ 9 µg/m³ |
| Santurtzi | ≈ 8 µg/m³ |
| Portugalete | ≈ 8 µg/m³ |
| Basauri | ≈ 9 µg/m³ |
| Errenteria | ≈ 6 µg/m³ |
| Leioa | ≈ 9 µg/m³ |
| Galdakao | ≈ 9 µg/m³ |
| Sestao | ≈ 8 µg/m³ |
| Eibar | ≈ 7 µg/m³ |
| Erandio | ≈ 9 µg/m³ |
| Arrasate / Mondragón | ≈ 7 µg/m³ |
| Lasarte | ≈ 6 µg/m³ |
| Hondarribia | ≈ 5 µg/m³ |
| Ermua | ≈ 7 µg/m³ |
| Gernika-Lumo | ≈ 9 µg/m³ |
| Mungia | ≈ 9 µg/m³ |
| Pasaia | ≈ 6 µg/m³ |
Bad-air episodes in Basque Country
- Spain, Portugal and Andorra, August 202510 to 22 August 2025, 13 days57 cities203 µg/m³peak, Ponferrada
- Basque Country and Castille and León, Spain, June 202510 June 2025, 1 day9 cities33 µg/m³peak, Beasain
- Europe, 1 to 14 February 202514 days628 cities179 µg/m³peak, Banja Luka
- Southern Europe, February 20244 to 9 February 2024, 6 days53 cities98 µg/m³peak, Peschiera del Garda
- Europe, 27 January to 2 February 20247 days173 cities134 µg/m³peak, Banja Luka
- Spain, Portugal and France, February 20241 to 2 February 2024, 2 days20 cities42 µg/m³peak, Vigo
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.