SmogRank / World / Slovenia / April 2025

Most polluted cities in Slovenia, April 2025

8 cities in Slovenia ranked by their average PM2.5 over the 30 days. Worst: Celje at 9.9 µg/m³, #1,132 of 2,569 cities in the world. Cleanest: Trbovlje at 8.3. A city needs measurements on 70% of the days to be ranked.

← Celje 9.9
Every city in Slovenia ranked for April 2025, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1CeljeUrban Municipality of Celje
    9.9
  2. 2KranjUrban Municipality of Kranj
    9.6
  3. 3PtujUrban Municipality of Ptuj
    9.5
  4. 4LjubljanaLjubljana
    9.0
  5. 5KoperUrban Municipality of Koper
    8.9
  6. 6Novo MestoUrban Municipality of Novo Mesto
    8.8
  7. 6MariborUrban Municipality of Maribor
    8.8
  8. 8TrbovljeMunicipality of Trbovlje
    8.3
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, April 2025 · Slovenia now

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SmogRank, most polluted cities in Slovenia, PM2.5, April 2025, smogrank.com/si/history/2025-04 (accessed 2 Oct 2026).

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