Most polluted cities in Ljubljana, Slovenia

1 measured city, last 7 days; 0 above the WHO 24-hour guideline. Worst: Ljubljana at 10.6 µg/m³, #670 in the world.

Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

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SmogRank, most polluted cities in Ljubljana, Slovenia, PM2.5, last 7 days to 2 Oct 2026, 04:00 UTC, smogrank.com/si/region/ljubljana?w=7d.

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Updated 2026-10-02 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.