Capital city in Central Slovenia, Slovenia
Air quality in Ljubljana
Polluted
The annual average PM2.5 in Ljubljana was 16 µg/m³ in 2020, about 3.2 times the WHO guideline of 5 µg/m³. Winter temperature inversions in the Ljubljana basin can trap fine particles on cold, still days; otherwise air is clean.
Key facts
- PM2.5: 16 µg/m³ yearly average (2020). Measured at Ljubljana.
- PM10: 29 µg/m³ (2020).
- Nitrogen dioxide: 22 µg/m³ (2020), mostly from traffic.
- Recent average: 18.8 µg/m³ over the last five years of measurements.
PM2.5 by year
| Year | Annual average |
|---|---|
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 |
Air quality across Slovenia
Quick answers
Is the air in Ljubljana bad?
Polluted: 16 µg/m³ of PM2.5 on average, 3.2× the WHO guideline.
When is the air worst in Ljubljana?
Winter temperature inversions in the Ljubljana basin can trap fine particles on cold, still days; otherwise air is clean.
How does Ljubljana compare with the rest of Slovenia?
People in Slovenia breathe 13 µg/m³ of PM2.5 on average (2023, World Bank/WHO), against 16 µg/m³ measured here.
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Sources
- WHO Ambient Air Quality Database
- WHO air quality guidelines (2021)
- Live air quality map (WAQI)
- Visit Ljubljana
- Ljubljana city buses (LPP)
- Ljubljana Airport (Fraport Slovenija)
- UKC Ljubljana
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 Spotted something out of date?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.