SmogRank / Alessandria / Marigliano
Alessandria vs Marigliano: PM2.5 compared
Over the last year, Marigliano's air was 20% more polluted than Alessandria's: PM2.5 averaged 15.5 µg/m³ against 12.9, on the 99 days both cities were measured. Marigliano had the dirtier air on 69 of those days, Alessandria on 30. Marigliano was over the WHO's daily guideline of 15 µg/m³ on 48 of them, Alessandria on 25.
Right now
The last year, day by day
Month by month
Each city's worst days
Alessandria
- 23 Jan 202612344.5 µg/m³
- 21 Jan 202611340.4 µg/m³
- 6 Oct 20268527.6 µg/m³
Marigliano
- 23 Jan 202616169.2 µg/m³
- 29 Aug 202611340.2 µg/m³
- 28 Aug 202610737.9 µg/m³
Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.
Compare either city with another
Alessandria
Side by side with Sannazzaro de' Burgondi (the nearest), Vinovo (Italy's 2nd worst on 30 days), Gujranwala (the world's worst on 30 days).
Marigliano
Side by side with Acerra (the nearest), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Alessandria and Marigliano, 7 Oct 2025 – 6 Oct 2026, smogrank.com/compare/it-alessandria/it-marigliano (accessed 7 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 2026-10-07 13:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.