SmogRank / Milan / Trento

Milan vs Trento: PM2.5 compared

Over the last year, Milan and Trento had about the same air: PM2.5 averaged 13.7 and 13.2 µg/m³, on the 137 days both cities were measured. Milan had the dirtier air on 68 of those days, Trento on 69. Milan was over the WHO's daily guideline of 15 µg/m³ on 39 of them, Trento on 38.

Right now

Milan–not on the 24-hour board right now
Trento–not on the 24-hour board right now

The last year, day by day

Milan
Trento
Each city's daily mean from 6 Oct 2025 to 5 Oct 2026, one stripe a day, coloured by band. A blank stripe is a day without a daily mean.

Month by month

15Nov 2025DecJan 2026FebMarMilan, Apr: 13.2 µg/m³Trento, Apr: 12.2 µg/m³AprMilan, May: 9.3 µg/m³Trento, May: 14.8 µg/m³MayMilan, Jun: 10.6 µg/m³Trento, Jun: 15.2 µg/m³JunMilan, Jul: 11.5 µg/m³Trento, Jul: 11.0 µg/m³JulMilan, Aug: 11.9 µg/m³Trento, Aug: 10.9 µg/m³AugMilan, Sep: 14.1 µg/m³Trento, Sep: 10.6 µg/m³SepOct
Monthly means in µg/m³ over the days both cities were measured. Solid: Milan. Faded: Trento. A month shows once both share 10 such days. Dashed line: the WHO daily guideline.

Year by year

YearMilanTrentoDays both measuredDays Milan was worse
2026 so far575812658
20255754167108
2024635816377

Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.

Each city's worst days

Milan

Trento

Daily means in US AQI, over the days both cities were measured in the last year. Each date opens that day's world board.

Compare either city with another

Milan

Side by side with Monza, Vinovo, Gujranwala.

Trento

Side by side with Rovereto, Gujranwala.

Use this page

SmogRank, PM2.5 daily means compared, Milan and Trento, 8 Oct 2025 – 4 Oct 2026, smogrank.com/compare/it-milan/it-trento (accessed 6 Oct 2026).

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.

Updated 2026-10-06 21:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.