SmogRank / Spain / Andalusia / Bailén

Bailén, month by month

Bailén has a measured daily mean on 859 days since 1 January 2023. Its worst month was December 2023, at 76 US AQI (22.7 µg/m³), 116th of 2,247 cities on that month's world ranking. Its cleanest was October 2023, at 45 US AQI (8.1 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)92 days measured
Jan19 daysFeb7 daysMarnoneAprnoneMay1 dayJun6 daysJul9 daysAug55#622Sep56#510Oct5 days
2025too few days for a mean (a year needs 256)221 days measured
Jan21 daysFeb15 daysMar17 daysApr17 daysMay18 daysJun15 daysJul21 daysAug64#308Sep51#824Oct16 daysNov15 daysDec59#816
2024too few days for a mean (a year needs 257)238 days measured
Jan71#277Feb62#342Mar15 daysApr61#461May53#740Jun54#548Jul13 daysAug6 daysSepnoneOct14 daysNov63#396Dec66#370
202358 for the year308 days measured168th of 1,355 in the world
Jan15 daysFeb74#94Mar61#98Apr55#320May51#629Jun52#841Jul56#402Aug18 daysSep19 daysOct45#738Nov59#208Dec76#116
Each square is a month's mean PM2.5 in US AQI from Bailén'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 Bailén marked; each year, the year's.
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

25 months
MonthWhy
Oct 20265 of 11 days measured; a month needs 8. The others: 1 with no readings from the monitor, 5 with readings for part of the day (a day needs 18 hours).
Jul 20269 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks.
Jun 20266 of 30 days measured; a month needs 21. The others: 24 with under 18 hours of readings or readings that failed our checks.
May 20261 of 31 days measured; a month needs 22. The others: 30 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 20267 of 28 days measured; a month needs 20. The others: 21 with under 18 hours of readings or readings that failed our checks.
Jan 202619 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Nov 202515 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
Oct 202516 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Jul 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Jun 202515 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
May 202518 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Apr 202517 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks.
Mar 202517 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Feb 202515 of 28 days measured; a month needs 20. The others: 13 with under 18 hours of readings or readings that failed our checks.
Jan 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Oct 202414 of 31 days measured; a month needs 22. The others: 17 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 20246 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks.
Jul 202413 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Mar 202415 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Sep 202319 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
Aug 202318 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Jan 202315 of 31 days measured; a month needs 22. The others: 16 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.

Bailén's worst months

MonthUS AQIDays measuredWorld rankEpisode
December 2023 7622.7 µg/m³29 of 31116thof 2,247Spain, France and 2 more countries, December 2023 to January 2024
February 2023 7421.7 µg/m³28 of 2894thof 1,129Spain, France and Portugal, February 2023
Northern Spain and Portugal, February 2023
January 2024 7119.8 µg/m³29 of 31277thof 2,385Europe, 27 January to 2 February 2024
Spain, France and 2 more countries, December 2023 to January 2024
December 2024 6617.3 µg/m³26 of 31370thof 2,616–
August 2025 6416.0 µg/m³22 of 31308thof 2,901Spain, Portugal and Andorra, August 2025
November 2024 6315.3 µg/m³24 of 30396thof 2,624–

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.

Bailén's worst days

DayUS AQIEpisode
5 Feb 2023 15257.0 µg/m³Northern Spain and Portugal, February 2023
7 Apr 2024 14754.3 µg/m³Spain, April 2024
2 Feb 2023 13147.6 µg/m³Northern Spain and Portugal, February 2023
29 Dec 2023 11240.1 µg/m³Spain, France and 2 more countries, December 2023 to January 2024
3 Feb 2023 11139.6 µg/m³Northern Spain and Portugal, February 2023
31 Dec 2023 10938.7 µg/m³Spain, France and 2 more countries, December 2023 to January 2024
6 Apr 2024 10838.4 µg/m³Spain, April 2024
21 Dec 2023 10738.0 µg/m³–
28 Dec 2023 10537.2 µg/m³Spain, France and 2 more countries, December 2023 to January 2024
4 Feb 2023 10336.5 µg/m³Northern Spain and Portugal, February 2023

Daily means, the highest since 1 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, Bailén, Spain, 1 Jan 2023 – 9 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/bailen/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.

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

Updated 2026-10-12 19:07 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).