SmogRank / Countries / Portugal
Most polluted cities in Portugal
3 measured cities, last 24 hours; 0 above the WHO 24-hour guideline. Worst: Porto at 11.9 µg/m³, #297 in the world.
2 good 1 moderate
Estimated: cities without a monitor
Portugal 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 |
|---|---|
| Braga | ≈ 15 µg/m³ |
| Amadora | ≈ 9 µg/m³ |
| Coimbra | ≈ 12 µg/m³ |
| Leiria | ≈ 9 µg/m³ |
| Setúbal | ≈ 10 µg/m³ |
| Viseu | ≈ 11 µg/m³ |
| Queluz | ≈ 9 µg/m³ |
| Aveiro | ≈ 11 µg/m³ |
| Vila Nova de Gaia | ≈ 16 µg/m³ |
| Algueirão | ≈ 9 µg/m³ |
| Loures | ≈ 9 µg/m³ |
| Felgueiras | ≈ 22 µg/m³ |
| Rio de Mouro | ≈ 9 µg/m³ |
| Odivelas | ≈ 9 µg/m³ |
| Évora | ≈ 6 µg/m³ |
| Barreiro | ≈ 9 µg/m³ |
| Monsanto | ≈ 8 µg/m³ |
| Rio Tinto | ≈ 22 µg/m³ |
| São Domingos de Rana | ≈ 9 µg/m³ |
| Figueira da Foz | ≈ 9 µg/m³ |
| Lumiar | ≈ 9 µg/m³ |
| Paranhos | ≈ 22 µg/m³ |
| Ponte de Lima | ≈ 12 µg/m³ |
| Olival | ≈ 9 µg/m³ |
| Santo António dos Olivais | ≈ 12 µg/m³ |
| Sesimbra | ≈ 12 µg/m³ |
| Guimarães | ≈ 15 µg/m³ |
| Guarda | ≈ 10 µg/m³ |
| Ermesinde | ≈ 22 µg/m³ |
| Santo Ovídio | ≈ 16 µg/m³ |
| Portimão | ≈ 9 µg/m³ |
| Damaia | ≈ 9 µg/m³ |
| Benfica | ≈ 9 µg/m³ |
| Cascais | ≈ 9 µg/m³ |
| Viana do Castelo | ≈ 9 µg/m³ |
| Marvila | ≈ 9 µg/m³ |
| Bragança | ≈ 9 µg/m³ |
| Oeiras | ≈ 9 µg/m³ |
| Beja | ≈ 7 µg/m³ |
| Esposende | ≈ 9 µg/m³ |
Regions
Measured cities in each region (30 days).
Updated 2026-10-01 21:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.