SmogRank / History / City race
Cities in Italy, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Italy for PM2.5 over the 30 days to 14 May 2025: Jesi 12.4 µg/m³, Milan 9.6 µg/m³ and Vigevano 9.0 µg/m³.
- 1JesiThe Marches12.4
- 2MilanLombardy9.6
- 3VigevanoLombardy9.0
- 4MortaraLombardy9.0
- 5NaplesCampania8.8
- 6VercelliPiedmont7.5
- 7RoveretoTrentino-Alto Adige7.5
- 8San Pietro VernoticoApulia7.3
- 9GoriziaFriuli Venezia Giulia7.1
- 10TrentoTrentino-Alto Adige6.9
- 11Borgo ValsuganaTrentino-Alto Adige5.7
- 12LaivesTrentino-Alto Adige5.1
- 13BolzanoTrentino-Alto Adige5.1
- 14AostaAosta Valley3.9
Not counted on this day, too few days measured: Pavia since 14 May 2025, Ceglie Messapica since 14 May 2025, Acerra since 14 May 2025 and 7 more cities.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.