SmogRank / Alessandria / Mortara
Alessandria vs Mortara: PM2.5 compared
Over the last year, Alessandria's air was 6% more polluted than Mortara's: PM2.5 averaged 14.9 µg/m³ against 14.0, on the 51 days both cities were measured. Alessandria had the dirtier air on 28 of those days, Mortara on 23. Alessandria was over the WHO's daily guideline of 15 µg/m³ on 18 of them, Mortara on 17.
Right now
The last year, day by day
Month by month
Year by year
| Year | Alessandria | Mortara | Days Alessandria was worse |
|---|---|---|---|
| 2026 so far | 61 | 59 | 27 |
| 2025 | 56 | 58 | 37 |
| 2024 | 66 | 65 | 52 |
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
Alessandria
- 23 Jan 202612344.5 µg/m³
- 22 Jan 202611641.5 µg/m³
- 21 Jan 202611340.4 µg/m³
Mortara
- 21 Jan 20269633.4 µg/m³
- 14 Oct 20259532.9 µg/m³
- 22 Jan 20269030.1 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).
Mortara
Side by side with Sannazzaro de' Burgondi (the nearest), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Alessandria and Mortara, 7 Oct 2025 – 6 Oct 2026, smogrank.com/compare/it-alessandria/it-mortara (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.