SmogRank / Countries / Slovenia / March 2025

Most polluted cities in Slovenia, March 2025

8 cities in Slovenia ranked by their average PM2.5 over the 31 days. Worst: Celje at 15.1 µg/m³, #601 of 2,218 cities in the world. Cleanest: Koper at 9.3. A city needs measurements on 70% of the days to be ranked.

  1. 1CeljeUrban Municipality of Celje
    15.1
  2. 2KranjUrban Municipality of Kranj
    12.6
  3. 3PtujUrban Municipality of Ptuj
    12.5
  4. 4Novo MestoUrban Municipality of Novo Mesto
    12.2
  5. 5LjubljanaLjubljana
    11.9
  6. 6TrbovljeMunicipality of Trbovlje
    11.5
  7. 7MariborUrban Municipality of Maribor
    9.8
  8. 8KoperUrban Municipality of Koper
    9.3
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, March 2025 · Slovenia now