SmogRank / Countries / Slovenia / January 2025

Most polluted cities in Slovenia, January 2025

8 cities in Slovenia ranked by their average PM2.5 over the 31 days. Worst: Kranj at 26.2 µg/m³, #81 of 1,937 cities in the world. Cleanest: Koper at 17.0. A city needs measurements on 70% of the days to be ranked.

  1. 1KranjUrban Municipality of Kranj
    26.2
  2. 2CeljeUrban Municipality of Celje
    23.5
  3. 3Novo MestoUrban Municipality of Novo Mesto
    20.7
  4. 4PtujUrban Municipality of Ptuj
    19.8
  5. 5TrbovljeMunicipality of Trbovlje
    19.5
  6. 6LjubljanaLjubljana
    19.3
  7. 7MariborUrban Municipality of Maribor
    18.2
  8. 8KoperUrban Municipality of Koper
    17.0
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, January 2025 · Slovenia now