SmogRank / Countries / Slovenia

Most polluted cities in Slovenia

8 measured cities, this year; 8 above the WHO annual guideline. Worst: Ptuj at 12.4 µg/m³, #409 in the world.

1 good  7 moderate

  1. 1PtujUrban Municipality of Ptuj 12.42.5×
  2. 2CeljeUrban Municipality of Celje 11.32.3×
  3. 3Novo MestoUrban Municipality of Novo Mesto 10.92.2×
  4. 4LjubljanaLjubljana 10.32.1×
  5. 5MariborUrban Municipality of Maribor 9.92.0×
  6. 6KranjUrban Municipality of Kranj 9.71.9×
  7. 7TrbovljeMunicipality of Trbovlje 9.11.8×
  8. 8KoperUrban Municipality of Koper 8.31.7×
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 17:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.