SmogRank / Countries / Slovenia / February 2025

Most polluted cities in Slovenia, February 2025

8 cities in Slovenia ranked by their average PM2.5 over the 28 days. Worst: Celje at 44.6 µg/m³, #55 of 2,012 cities in the world. Cleanest: Koper at 23.8. A city needs measurements on 70% of the days to be ranked.

  1. 1CeljeUrban Municipality of Celje
    44.6
  2. 2PtujUrban Municipality of Ptuj
    40.2
  3. 3Novo MestoUrban Municipality of Novo Mesto
    39.0
  4. 4MariborUrban Municipality of Maribor
    35.1
  5. 5KranjUrban Municipality of Kranj
    34.7
  6. 6TrbovljeMunicipality of Trbovlje
    34.4
  7. 7LjubljanaLjubljana
    31.7
  8. 8KoperUrban Municipality of Koper
    23.8
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, February 2025 · Slovenia now

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SmogRank, most polluted cities in Slovenia, PM2.5, February 2025, smogrank.com/si/history/2025-02 (accessed 2 Oct 2026).

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