SmogRank / Countries / Slovenia / July 2025

Most polluted cities in Slovenia, July 2025

8 cities in Slovenia ranked by their average PM2.5 over the 31 days. Worst: Ljubljana at 6.4 µg/m³, #1,715 of 2,283 cities in the world. Cleanest: Trbovlje at 5.5. A city needs measurements on 70% of the days to be ranked.

  1. 1LjubljanaLjubljana
    6.4
  2. 2MariborUrban Municipality of Maribor
    6.3
  3. 3PtujUrban Municipality of Ptuj
    6.2
  4. 4KranjUrban Municipality of Kranj
    6.0
  5. 4CeljeUrban Municipality of Celje
    6.0
  6. 6KoperUrban Municipality of Koper
    5.9
  7. 7Novo MestoUrban Municipality of Novo Mesto
    5.6
  8. 8TrbovljeMunicipality of Trbovlje
    5.5
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, July 2025 · Slovenia now

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SmogRank, most polluted cities in Slovenia, PM2.5, July 2025, smogrank.com/si/history/2025-07 (accessed 2 Oct 2026).

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