SmogRank / Marigliano / Milan

Marigliano vs Milan: PM2.5 compared

Over the last year, Marigliano's air was 13% more polluted than Milan's: PM2.5 averaged 14.0 µg/m³ against 12.4, on the 116 days both cities were measured. Marigliano had the dirtier air on 76 of those days, Milan on 38. Marigliano was over the WHO's daily guideline of 15 µg/m³ on 44 of them, Milan on 26.

Right now

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

The last year, day by day

Marigliano
Milan
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 2026FebMarMarigliano, Apr: 15.2 µg/m³Milan, Apr: 13.2 µg/m³AprMarigliano, May: 10.7 µg/m³Milan, May: 9.2 µg/m³MayMarigliano, Jun: 13.2 µg/m³Milan, Jun: 9.8 µg/m³JunMarigliano, Jul: 15.1 µg/m³Milan, Jul: 11.5 µg/m³JulMarigliano, Aug: 17.8 µg/m³Milan, Aug: 11.9 µg/m³AugMarigliano, Sep: 10.8 µg/m³Milan, Sep: 13.2 µg/m³SepOct
Monthly means in µg/m³ over the days both cities were measured. Solid: Marigliano. Faded: Milan. A month shows once both share 10 such days. Dashed line: the WHO daily guideline.

Each city's worst days

Marigliano

Milan

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

Marigliano

Side by side with Acerra, Gujranwala.

Milan

Side by side with Monza, Vinovo, Gujranwala.

Use this page

SmogRank, PM2.5 daily means compared, Marigliano and Milan, 21 Oct 2025 – 4 Oct 2026, smogrank.com/compare/it-marigliano/it-milan (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.