SmogRank / Countries / Italy / September 2026

Most polluted cities in Italy, September 2026

13 cities in Italy ranked by their average PM2.5 over the 30 days. Worst: Milan at 13.8 µg/m³, #261 of 2,332 cities in the world. Cleanest: Gorizia at 5.4. A city needs measurements on 70% of the days to be ranked.

  1. 1MilanLombardy
    13.8
  2. 2NichelinoPiedmont
    12.9
  3. 3AlessandriaPiedmont
    12.1
  4. 4TurinPiedmont
    11.7
  5. 5BeneventoCampania
    10.6
  6. 6RoveretoTrentino-Alto Adige
    10.2
  7. 7TrentoTrentino-Alto Adige
    10.0
  8. 7AostaAosta Valley
    10.0
  9. 9CasertaCampania
    9.6
  10. 10NaplesCampania
    9.1
  11. 11SalernoCampania
    8.7
  12. 12BolzanoTrentino-Alto Adige
    7.5
  13. 13GoriziaFriuli Venezia Giulia
    5.4
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 2026 · Italy now