SmogRank / Countries / Slovenia / February 2026

Most polluted cities in Slovenia, February 2026

8 cities in Slovenia ranked by their average PM2.5 over the 28 days. Worst: Ptuj at 20.2 µg/m³, #331 of 2,251 cities in the world. Cleanest: Koper at 9.8. A city needs measurements on 70% of the days to be ranked.

  1. 1PtujUrban Municipality of Ptuj
    20.2
  2. 2CeljeUrban Municipality of Celje
    20.1
  3. 3Novo MestoUrban Municipality of Novo Mesto
    19.6
  4. 4LjubljanaLjubljana
    15.6
  5. 5MariborUrban Municipality of Maribor
    15.4
  6. 6KranjUrban Municipality of Kranj
    14.9
  7. 7TrbovljeMunicipality of Trbovlje
    14.2
  8. 8KoperUrban Municipality of Koper
    9.8
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 2026 · Slovenia now

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

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