SmogRank / Milan / Polla

Milan vs Polla: PM2.5 compared

Over the last year, Milan's air was about 1.5× as polluted as Polla's: PM2.5 averaged 12.6 µg/m³ against 8.3, on the 107 days both cities were measured. Milan had the dirtier air on 91 of those days, Polla on 16. Milan was over the WHO's daily guideline of 15 µg/m³ on 26 of them, Polla on 8.

Right now

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

The last year, day by day

Milan
Polla
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: 13.3 µg/m³Polla, Apr: 9.0 µg/m³AprMilan, May: 8.8 µg/m³Polla, May: 5.7 µg/m³MayMilan, Jun: 10.1 µg/m³Polla, Jun: 7.5 µg/m³JunMilan, Jul: 11.5 µg/m³Polla, Jul: 8.8 µg/m³JulMilan, Aug: 11.9 µg/m³Polla, Aug: 11.8 µg/m³AugMilan, Sep: 13.3 µg/m³Polla, Sep: 7.1 µg/m³SepOct
Monthly means in µg/m³ over the days both cities were measured. Solid: Milan. Faded: Polla. A month shows once both share 10 such days. Dashed line: the WHO daily guideline.

Each city's worst days

Milan

Polla

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.

Polla

Side by side with Salerno, Gujranwala.

Use this page

SmogRank, PM2.5 daily means compared, Milan and Polla, 21 Oct 2025 – 4 Oct 2026, smogrank.com/compare/it-milan/it-polla (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 20:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.