SmogRank / Italy / Piedmont / Alessandria

Alessandria, month by month

Alessandria has a measured daily mean on 584 days since 3 January 2023. Its worst month was January 2024, at 100 US AQI (35.4 µg/m³), 87th of 2,385 cities on that month's world ranking. Its cleanest was August 2026, at 55 US AQI (11.4 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)117 days measured
Jan3 daysFebnoneMar1 dayApr59#642May8 daysJun17 daysJul6 daysAug55#637Sep57#470Oct69#124
2025too few days for a mean (a year needs 256)94 days measured
JannoneFebnoneMar2 daysApr18 daysMay10 daysJun9 daysJul16 daysAug18 daysSep18 daysOct3 daysNovnoneDecnone
2024too few days for a mean (a year needs 257)112 days measured
Jan100#87Feb82#135Mar11 daysApr63#372May59#374JunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
202369 for the year261 days measured85th of 1,355 in the world
Jan14 daysFeb2 daysMar11 daysApr60#188May57#260Jun61#395Jul19 daysAug16 daysSep64#155Oct70#71Nov81#48Dec94#57
Each square is a month's mean PM2.5 in US AQI from Alessandria's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Alessandria marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

31 months
MonthWhy
Jul 20266 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks.
Jun 202617 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks.
May 20268 of 31 days measured; a month needs 22. The others: 23 with under 18 hours of readings or readings that failed our checks.
Mar 20261 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Feb 2026No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 20263 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Dec 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 20253 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Sep 202518 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Aug 202518 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Jul 202516 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Jun 20259 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks.
May 202510 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Apr 202518 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Mar 20252 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Feb 2025No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 202411 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks.
Aug 202316 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Jul 202319 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks.
Mar 202311 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive.
Feb 20232 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks.
Jan 202314 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 8 with under 18 hours of readings or readings that failed our checks.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Alessandria's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 10035.4 µg/m³28 of 3187thof 2,385Italy, Switzerland and France, January 2024
December 2023 9432.1 µg/m³29 of 3157thof 2,247–
February 2024 8225.7 µg/m³22 of 29135thof 2,486Italy, Switzerland and France, February 2024
November 2023 8125.1 µg/m³28 of 3048thof 2,243–
October 2023 7019.2 µg/m³28 of 3171stof 2,012–
September 2023 6416.0 µg/m³27 of 30155thof 2,176–

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Alessandria's worst days

DayUS AQIEpisode
25 Jan 2024 15967.0 µg/m³Italy, Switzerland and France, January 2024
20 Feb 2024 15663.1 µg/m³Italy, Switzerland and France, February 2024
14 Feb 2023 15561.7 µg/m³Europe, 6 to 25 February 2023
24 Jan 2024 15358.9 µg/m³Italy, Switzerland and France, January 2024
26 Jan 2024 15155.6 µg/m³Italy, Switzerland and France, January 2024
19 Mar 2023 14553.5 µg/m³Europe, 17 to 22 March 2023
6 Feb 2024 14151.8 µg/m³–
15 Jan 2024 14151.6 µg/m³–
14 Jan 2024 13549.5 µg/m³–
21 Dec 2023 13549.2 µg/m³–

Daily means, the highest since 3 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Alessandria, Italy, 3 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/it/alessandria/history (accessed 12 Oct 2026).

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Alessandria now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 20:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).