Capital city, Norway
Air quality in Oslo
Fairly clean
The annual average PM2.5 in Oslo was 9 µg/m³ in 2021, about 1.8 times the WHO guideline of 5 µg/m³. Winter inversions and studded tyres can raise PM10 in cold, still weather; usually clean otherwise.
Key facts
- PM2.5: 9 µg/m³ yearly average (2021). Measured at Oslo.
- PM10: 18 µg/m³ (2021).
- Nitrogen dioxide: 19 µg/m³ (2021), mostly from traffic.
- Recent average: 8 µg/m³ over the last five years of measurements.
PM2.5 by year
| Year | Annual average |
|---|---|
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 |
Air quality across Norway
Quick answers
Is the air in Oslo bad?
Fairly clean: 9 µg/m³ of PM2.5 on average, 1.8× the WHO guideline.
When is the air worst in Oslo?
Winter inversions and studded tyres can raise PM10 in cold, still weather; usually clean otherwise.
How does Oslo compare with the rest of Norway?
People in Norway breathe 6 µg/m³ of PM2.5 on average (2023, World Bank/WHO), against 9 µg/m³ measured here.
More about Oslo
Going to Oslo solo?
SoloSquare is where travelers, nomads and locals in Oslo meet up for small plans: coffee, dinners, walks and day trips. Join one, or start your own in a minute.
Sources
- WHO Ambient Air Quality Database
- WHO air quality guidelines (2021)
- Live air quality map (WAQI)
- Ruter
- Avinor Oslo Airport
- Visit Oslo
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 Spotted something out of date?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.