City in Northern Portugal, Portugal
Air quality in Porto
8PM2.5 µg/m³, yearly
Fairly clean
The annual average PM2.5 in Porto was 8 µg/m³ in 2018, about 1.6 times the WHO guideline of 5 µg/m³.
Key facts
- PM2.5: 8 µg/m³ yearly average (2018). Measured at Porto.
- PM10: 19 µg/m³ (2018).
- Nitrogen dioxide: 49 µg/m³ (2018), mostly from traffic.
- Recent average: 5 µg/m³ over the last five years of measurements.
PM2.5 by year
| Year | Annual average |
|---|---|
| 2018 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 |
Air quality across Portugal
| Place | PM2.5 | Level |
|---|---|---|
| Algarve | 2.9 µg/m³ | Meets the WHO guideline |
| Faro | 2.9 µg/m³ | Meets the WHO guideline |
| Madeira | 5 µg/m³ | Meets the WHO guideline |
| Douro Valley | 5 µg/m³ | Meets the WHO guideline |
| Silver Coast | 6.4 µg/m³ | Fairly clean |
| Sintra | 7.4 µg/m³ | Fairly clean |
| Cascais | 7.4 µg/m³ | Fairly clean |
| Azores | 7.4 µg/m³ | Fairly clean |
| Porto | 8 µg/m³ | Fairly clean |
| Lisbon | 9 µg/m³ | Fairly clean |
Quick answers
Is the air in Porto bad?
Fairly clean: 8 µg/m³ of PM2.5 on average, 1.6× the WHO guideline.
How does Porto compare with the rest of Portugal?
People in Portugal breathe 9 µg/m³ of PM2.5 on average (2023, World Bank/WHO), against 8 µg/m³ measured here.
More about Porto
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Sources
- WHO Ambient Air Quality Database
- WHO air quality guidelines (2021)
- Live air quality map (WAQI)
- Metro do Porto
- STCP
- Porto Airport (ANA)
- Visit Porto
Annual averages are measured values reported to the WHO; check a live map for today's air. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.