SmogRank / Countries / Italy / May 2026

Most polluted cities in Italy, May 2026

24 cities in Italy ranked by their average PM2.5 over the 31 days. Worst: Trento at 14.4 µg/m³, #244 of 2,243 cities in the world. Cleanest: Aosta at 6.2. A city needs measurements on 70% of the days to be ranked.

  1. 1TrentoTrentino-Alto Adige
    14.4
  2. 2JesiThe Marches
    11.5
  3. 3RoveretoTrentino-Alto Adige
    10.6
  4. 3MariglianoCampania
    10.6
  5. 3AcerraCampania
    10.6
  6. 6NichelinoPiedmont
    10.5
  7. 7VigevanoLombardy
    10.2
  8. 8NovaraPiedmont
    9.9
  9. 9NaplesCampania
    9.8
  10. 10MilanLombardy
    9.3
  11. 10BorgomaneroPiedmont
    9.3
  12. 12CasertaCampania
    9.0
  13. 12BresciaLombardy
    9.0
  14. 14Falconara MarittimaThe Marches
    8.9
  15. 15Cava Dè TirreniCampania
    8.8
  16. 16ComoLombardy
    8.7
  17. 16San Felice A CancelloCampania
    8.7
  18. 18TurinPiedmont
    8.4
  19. 19BeneventoCampania
    8.0
  20. 20SalernoCampania
    7.5
  21. 21VerbaniaPiedmont
    7.3
  22. 22BolzanoTrentino-Alto Adige
    7.1
  23. 23AvellinoCampania
    6.3
  24. 24AostaAosta Valley
    6.2
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, May 2026 · Italy now