SmogRank / Countries / Slovenia

Most polluted cities in Slovenia

5 measured cities, last 24 hours; 0 above the WHO 24-hour guideline. Worst: Celje at 11.4 µg/m³, #254 in the world.

2 good  3 moderate

  1. 1CeljeUrban Municipality of Celje 11.40.8×
  2. 2TrbovljeMunicipality of Trbovlje 10.30.7×
  3. 3Novo MestoUrban Municipality of Novo Mesto 9.10.6×
  4. 4MariborUrban Municipality of Maribor 8.40.6×
  5. 5KoperUrban Municipality of Koper 8.20.5×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Estimated: cities without a monitor

Slovenia cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Velenje≈ 8 µg/m³Good

Regions

Ljubljana 1Municipality of Trbovlje 1Urban Municipality of Celje 1Urban Municipality of Koper 1Urban Municipality of Kranj 1Urban Municipality of Maribor 1Urban Municipality of Novo Mesto 1Urban Municipality of Ptuj 1

Measured cities in each region (30 days).

Updated 2026-10-01 19:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.