SmogRank / Milan / Omegna

Milan vs Omegna: PM2.5 compared

Over the last year, Milan's air was 30% more polluted than Omegna's: PM2.5 averaged 13.7 µg/m³ against 10.5, on the 103 days both cities were measured. Milan had the dirtier air on 76 of those days, Omegna on 26. Milan was over the WHO's daily guideline of 15 µg/m³ on 27 of them, Omegna on 12.

Right now

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

The last year, day by day

Milan
Omegna
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: 13.7 µg/m³Omegna, Apr: 9.7 µg/m³AprMilan, May: 9.2 µg/m³Omegna, May: 7.4 µg/m³MayMilan, Jun: 10.9 µg/m³Omegna, Jun: 10.2 µg/m³JunMilan, Jul: 11.5 µg/m³Omegna, Jul: 11.5 µg/m³JulMilan, Aug: 11.6 µg/m³Omegna, Aug: 12.1 µg/m³AugMilan, Sep: 14.9 µg/m³Omegna, Sep: 10.3 µg/m³SepOct
Monthly means in µg/m³ over the days both cities were measured. Solid: Milan. Faded: Omegna. A month shows once both share 10 such days. Dashed line: the WHO daily guideline.

Year by year

YearMilanOmegnaDays both measuredDays Milan was worse
2026 so far58539871
202560483732

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

Omegna

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.

Omegna

Side by side with Borgomanero, Gujranwala.

Use this page

SmogRank, PM2.5 daily means compared, Milan and Omegna, 14 Oct 2025 – 4 Oct 2026, smogrank.com/compare/it-milan/it-omegna (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.