Air Quality Index (AQI) in Slovenia 🇸🇮

Live Air Quality Index (AQI) and PM2.5 Levels in Slovenia

Currently, the Air Quality Index (AQI) in Ljubljana, the capital of Slovenia, is measured at a score of 87. According to the US EPA health standard, this air quality rating is categorized as Moderate. The current atmosphere in Ljubljana is influenced by a PM2.5 (fine particulate matter) concentration of 28.3 µg/m³ and PM10 levels recorded at 34.1 µg/m³. Monitoring of gaseous pollutants shows Nitrogen Dioxide (NO2) at 25.4 µg/m³.

Beyond the primary urban hubs, atmospheric conditions and smog levels fluctuate across Slovenia based on industrial output, traffic density, and local weather patterns. Real-time pollution data and respiratory health alerts are also being actively monitored in cities like Maribor, Kranj, Celje and Koper. Tracking these air quality metrics is essential for residents nationwide to manage outdoor exposure and maintain respiratory safety during periods of increased particulate concentration.

Air Quality Snapshot: Slovenia Right Now

Across 5 monitored cities in Slovenia, live air quality currently ranges from a low of 16 AQI in Maribor (the cleanest air right now) to a high of 87 AQI in Ljubljana (the most polluted). By US EPA health band, the nationwide distribution stands at 3 Good, 2 Moderate. The average fine-particulate (PM2.5) concentration across these cities is 10.3 µg/m³ — approximately 2.1 times the World Health Organization (WHO) annual air quality guideline of 5 µg/m³.

Slovenia Air Quality: Major Cities Index

Ljubljana
2
Maribor
1

Kranj
1
Celje
1

Koper
1

* Air Quality Index (AQI) data for Slovenia is calculated using the US EPA standard. Information is processed from multiple monitoring stations detecting PM2.5, PM10, and gaseous pollutants to ensure accuracy for respiratory health planning.

What Today's Readings Mean in Slovenia

The median reading across 5 monitored cities is 24 AQI. The national spread is 71 points, from 16 in Maribor to 87 in Ljubljana. Average PM2.5 is 10.3 µg/m³ (2.1× the WHO annual guideline).

At least one monitored location is in the Moderate range. People unusually sensitive to air pollution may want to reduce prolonged outdoor exertion there.

See the complete AQI and pollutant reference scales

Health & Scientific Resources

→ How to read US EPA Air Quality Index before going outside → Understanding Air Quality Index levels and what they mean → When haze forms and what it does to air quality

Air Quality in Slovenia — FAQ

Common questions about AQI levels, pollutants, and data sources for Slovenia.

What is the current air quality in Slovenia?

Live AQI readings for 5 city(ies) across Slovenia are listed above on the US EPA 0-500 scale.

Where does Slovenia's AQI data come from?

Real-time readings come from ground-based monitoring stations operated by national environmental agencies in Slovenia, delivered via WeatherAPI.com and aggregated using the EPA AQI formula.

What is a healthy AQI value in Slovenia?

On the EPA scale used worldwide, 0-50 is Good, 51-100 is Moderate, 101-150 is Unhealthy for sensitive groups, 151-200 is Unhealthy, 201-300 is Very Unhealthy, and 301-500 is Hazardous. The WHO 24-hour PM2.5 guideline is 15 μg/m³.

Why do AQI readings vary between cities in Slovenia?

Air quality is highly local — major pollution sources (traffic, industry, dust, wildfires) cluster around cities, while wind direction and topography move them around. Comparing nearby readings on this page is the best way to see how conditions change across Slovenia.