SmogRank / Countries / Italy / September 2025

Most polluted cities in Italy, September 2025

21 cities in Italy ranked by their average PM2.5 over the 30 days. Worst: Jesi at 13.7 µg/m³, #229 of 2,439 cities in the world. Cleanest: Aosta at 4.8. A city needs measurements on 70% of the days to be ranked.

  1. 1JesiThe Marches
    13.7
  2. 2PaviaLombardy
    12.5
  3. 3Ceglie MessapicaApulia
    12.4
  4. 4MilanLombardy
    12.3
  5. 5NichelinoPiedmont
    11.4
  6. 6NovaraPiedmont
    11.2
  7. 7BraPiedmont
    10.9
  8. 8VigevanoLombardy
    9.7
  9. 9TurinPiedmont
    9.2
  10. 10Falconara MarittimaThe Marches
    9.1
  11. 11VercelliPiedmont
    8.9
  12. 12BorgomaneroPiedmont
    8.6
  13. 13TrentoTrentino-Alto Adige
    8.0
  14. 13RoveretoTrentino-Alto Adige
    8.0
  15. 13VerbaniaPiedmont
    8.0
  16. 16NaplesCampania
    7.4
  17. 17BolzanoTrentino-Alto Adige
    7.1
  18. 18CapannoriTuscany
    7.0
  19. 19BiellaPiedmont
    6.0
  20. 20GoriziaFriuli Venezia Giulia
    5.5
  21. 21AostaAosta Valley
    4.8
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, September 2025 · Italy now

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SmogRank, most polluted cities in Italy, PM2.5, September 2025, smogrank.com/it/history/2025-09 (accessed 2 Oct 2026).

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