SmogRank / Countries / Slovenia / November 2025

Most polluted cities in Slovenia, November 2025

8 cities in Slovenia ranked by their average PM2.5 over the 30 days. Worst: Celje at 14.6 µg/m³, #386 of 2,173 cities in the world. Cleanest: Maribor at 11.0. A city needs measurements on 70% of the days to be ranked.

  1. 1CeljeUrban Municipality of Celje
    14.6
  2. 2LjubljanaLjubljana
    13.8
  3. 3Novo MestoUrban Municipality of Novo Mesto
    13.4
  4. 4PtujUrban Municipality of Ptuj
    13.3
  5. 5KranjUrban Municipality of Kranj
    13.1
  6. 6TrbovljeMunicipality of Trbovlje
    13.0
  7. 7KoperUrban Municipality of Koper
    11.2
  8. 8MariborUrban Municipality of Maribor
    11.0
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, November 2025 · Slovenia now

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SmogRank, most polluted cities in Slovenia, PM2.5, November 2025, smogrank.com/si/history/2025-11 (accessed 1 Oct 2026).

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