Most polluted cities in Italy

24 measured cities ranked by PM2.5, last 7 days. Worst: Aosta at 19.2 µg/m³, #163 in the world.

#	City	µg/m³
1	Aosta Aosta Valley	19.2
2	Bra Piedmont	16.1
3	Milan Lombardy	16.0
4	Nichelino Piedmont	14.6
5	Turin Piedmont	14.1
6	Alessandria Piedmont	13.8
7	Rovereto Trentino-Alto Adige	12.5
8	Trento Trentino-Alto Adige	11.5
9	Borgomanero Piedmont	10.6
10	Verbania Piedmont	10.6
11	Ancona The Marches	10.5
12	Bolzano Trentino-Alto Adige	10.1
13	Acerra Campania	9.5
14	Marigliano Campania	9.3
15	Naples Campania	9.1
16	Biella Piedmont	8.9
17	Benevento Campania	8.3
18	Caserta Campania	8.1
19	Salerno Campania	7.9
20	Cava Dè Tirreni Campania	7.6
21	San Felice A Cancello Campania	7.4
22	Gorizia Friuli Venezia Giulia	7.3
23	Avellino Campania	7.2
24	Nocera Inferiore Campania	7.1

Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

Estimated: cities without a monitor

Italy cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City	7-day estimate	Band
Palermo estimated	≈ 10 µg/m³	Moderate
Bologna estimated	≈ 9 µg/m³	Good
Catania estimated	≈ 10 µg/m³	Moderate
Verona estimated	≈ 12 µg/m³	Moderate
Messina estimated	≈ 8 µg/m³	Good
Trieste estimated	≈ 6 µg/m³	Good
Padua estimated	≈ 16 µg/m³	Moderate
Parma estimated	≈ 9 µg/m³	Good
Modena estimated	≈ 10 µg/m³	Moderate
Reggio Calabria estimated	≈ 8 µg/m³	Good
Reggio nell'Emilia estimated	≈ 10 µg/m³	Moderate
Rimini estimated	≈ 7 µg/m³	Good
Mestre estimated	≈ 11 µg/m³	Moderate
Ferrara estimated	≈ 10 µg/m³	Moderate
Acilia-Castel Fusano-Ostia Antica estimated	≈ 11 µg/m³	Moderate
Siracusa estimated	≈ 10 µg/m³	Moderate
Perugia estimated	≈ 7 µg/m³	Good
Forlì estimated	≈ 9 µg/m³	Good
Vicenza estimated	≈ 13 µg/m³	Moderate
Terni estimated	≈ 6 µg/m³	Good
Piacenza estimated	≈ 10 µg/m³	Moderate
Udine estimated	≈ 7 µg/m³	Good
Cesena estimated	≈ 7 µg/m³	Good
Sassari estimated	≈ 8 µg/m³	Good
Guidonia Montecelio estimated	≈ 12 µg/m³	Moderate
Treviso estimated	≈ 11 µg/m³	Moderate
Torre del Greco estimated	≈ 9 µg/m³	Moderate
Busto Arsizio estimated	≈ 15 µg/m³	Moderate
Sesto San Giovanni estimated	≈ 16 µg/m³	Moderate
Lucca estimated	≈ 7 µg/m³	Good
Pozzuoli estimated	≈ 8 µg/m³	Good
Ravenna estimated	≈ 9 µg/m³	Good
Fiumicino estimated	≈ 11 µg/m³	Moderate
Giugliano in Campania estimated	≈ 9 µg/m³	Moderate
Catanzaro estimated	≈ 5 µg/m³	Good
Marsala estimated	≈ 8 µg/m³	Good
Pesaro estimated	≈ 7 µg/m³	Good
Fuorigrotta estimated	≈ 8 µg/m³	Good
Cinisello Balsamo estimated	≈ 16 µg/m³	Moderate
Gela estimated	≈ 10 µg/m³	Moderate

Regions

Aosta Valley 1 Campania 4 Friuli Venezia Giulia 1 Lombardy 1 Piedmont 3 Trentino-Alto Adige 3

Updated 2026-10-01 05:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.