SmogRank / Countries / Slovenia / July 2026

Most polluted cities in Slovenia, July 2026

8 cities in Slovenia ranked by their average PM2.5 over the 31 days. Worst: Ljubljana at 7.0 µg/m³, #1,750 of 2,262 cities in the world. Cleanest: Novo Mesto at 5.8. A city needs measurements on 70% of the days to be ranked.

  1. 1LjubljanaLjubljana
    7.0
  2. 2KranjUrban Municipality of Kranj
    6.9
  3. 3PtujUrban Municipality of Ptuj
    6.5
  4. 4CeljeUrban Municipality of Celje
    6.3
  5. 5MariborUrban Municipality of Maribor
    6.0
  6. 5KoperUrban Municipality of Koper
    6.0
  7. 7TrbovljeMunicipality of Trbovlje
    5.8
  8. 7Novo MestoUrban Municipality of Novo Mesto
    5.8
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, July 2026 · Slovenia now

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

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