SmogRank / Italy / The Marches / Ancona

Ancona, month by month

Ancona has a measured daily mean on 454 days since 3 January 2023. Its worst month was February 2023, at 80 US AQI (24.8 µg/m³), 53rd of 1,129 cities on that month's world ranking. Its cleanest was April 2024, at 50 US AQI (9.0 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)67 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJul16 daysAug64#354Sep13 daysOct53#582
2025too few days for a mean (a year needs 256)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2024too few days for a mean (a year needs 257)130 days measured
Jan77#208Feb66#285Mar12 daysApr50#1,165May56#521Jun11 daysJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
202363 for the year257 days measured108th of 1,355 in the world
Jan62#244Feb80#53Mar57#148Apr13 daysMay20 daysJun10 daysJul15 daysAug17 daysSep70#104Oct56#186Nov53#535Dec67#200
Each square is a month's mean PM2.5 in US AQI from Ancona'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 Ancona 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

33 months
MonthWhy
Sep 202613 of 30 days measured; a month needs 21. The others: 17 with readings for part of the day (a day needs 18 hours).
Jul 202616 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Jun 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2026No day measured. The others: 31 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 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2025No day measured.
Nov 2025No day measured.
Oct 2025No day measured.
Sep 2025No day measured.
Aug 2025No day measured.
Jul 2025No day measured.
Jun 2025No day measured.
May 2025No day measured.
Apr 2025No day measured.
Mar 2025No day measured.
Feb 2025No day measured.
Jan 2025No day measured.
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 202411 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks.
Mar 202412 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Aug 202317 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Jul 202315 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Jun 202310 of 30 days measured; a month needs 21. The others: 20 with under 18 hours of readings or readings that failed our checks.
May 202320 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Apr 202313 of 30 days measured; a month needs 21. The others: 2 missing from OpenAQ's archive, 15 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.

Ancona's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2023 8024.8 µg/m³27 of 2853rdof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023and 1 more
January 2024 7723.2 µg/m³27 of 31208thof 2,385Europe, 8 to 27 January 2024
September 2023 7019.5 µg/m³27 of 30104thof 2,176–
December 2023 6717.9 µg/m³27 of 31200thof 2,247Eastern Europe, December 2023
Italy, Bosnia and Herzegovina and 2 more countries, December 2023
February 2024 6616.9 µg/m³23 of 29285thof 2,486–
August 2026 6416.1 µg/m³27 of 31354thof 2,896–

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.

Ancona's worst days

DayUS AQIEpisode
11 Aug 2026 199124.0 µg/m³–
16 Jan 2024 16169.4 µg/m³Europe, 8 to 27 January 2024
6 Jul 2023 15967.1 µg/m³–
16 Feb 2023 15865.3 µg/m³Europe, 6 to 25 February 2023
15 Feb 2023 15864.8 µg/m³Europe, 6 to 25 February 2023
15 Jan 2024 15663.0 µg/m³Europe, 8 to 27 January 2024
12 Aug 2026 14553.3 µg/m³–
21 Jul 2023 13147.6 µg/m³–
14 Jan 2023 12946.8 µg/m³–
21 Dec 2023 12344.3 µg/m³Eastern Europe, December 2023
Italy, Bosnia and Herzegovina and 2 more countries, December 2023

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, Ancona, 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/ancona/history (accessed 12 Oct 2026).

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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.

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

Updated 2026-10-12 18:07 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).