SmogRank / Countries / Slovenia / May 2025

Most polluted cities in Slovenia, May 2025

8 cities in Slovenia ranked by their average PM2.5 over the 31 days. Worst: Ptuj at 8.3 µg/m³, #904 of 2,193 cities in the world. Cleanest: Koper at 5.4. A city needs measurements on 70% of the days to be ranked.

  1. 1PtujUrban Municipality of Ptuj
    8.3
  2. 2LjubljanaLjubljana
    8.0
  3. 2CeljeUrban Municipality of Celje
    8.0
  4. 4KranjUrban Municipality of Kranj
    7.2
  5. 5MariborUrban Municipality of Maribor
    6.9
  6. 6Novo MestoUrban Municipality of Novo Mesto
    6.5
  7. 7TrbovljeMunicipality of Trbovlje
    6.4
  8. 8KoperUrban Municipality of Koper
    5.4
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, May 2025 · Slovenia now