Town in Coastal-Karst, Slovenia
Air quality in Piran
10.3PM2.5 µg/m³, yearly
Moderate
The annual average PM2.5 in Piran was 10.3 µg/m³ in 2024, about 2.1 times the WHO guideline of 5 µg/m³.
Key facts
- PM2.5: 10.3 µg/m³ yearly average (2024). Measured at Koper, 11 km away.
- PM10: 15 µg/m³ (2024).
- Nitrogen dioxide: 15 µg/m³ (2024), mostly from traffic.
- Recent average: 12 µg/m³ over the last five years of measurements.
PM2.5 by year
| Year | Annual average |
|---|---|
| 2024 | |
| 2023 | |
| 2022 |
Air quality across Slovenia
Quick answers
Is the air in Piran bad?
Moderate: 10.3 µg/m³ of PM2.5 on average, 2.1× the WHO guideline.
How does Piran compare with the rest of Slovenia?
People in Slovenia breathe 13 µg/m³ of PM2.5 on average (2023, World Bank/WHO), against 10.3 µg/m³ measured here.
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Sources
- WHO Ambient Air Quality Database
- WHO air quality guidelines (2021)
- Live air quality map (WAQI)
- Portorož and Piran Tourism
- Slovenia.info (Slovenian Tourist Board)
- Arriva Slovenia
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 Spotted something out of date?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.