SmogRank / Spain / Andalusia / Algeciras

Algeciras, month by month

Algeciras has a measured daily mean on 880 days since 1 January 2023. Its worst month was January 2024, at 58 US AQI (12.6 µg/m³), 633rd of 2,385 cities on that month's world ranking. Its cleanest was April 2025, at 36 US AQI (6.4 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)93 days measured
Jan16 daysFeb4 daysMarnoneAprnoneMay2 daysJun6 daysJul9 daysAug53#807Sep45#973Oct5 days
2025too few days for a mean (a year needs 256)253 days measured
Jan52#1,099Feb44#1,586Mar21 daysApr36#2,187May20 daysJun16 daysJul41#1,907Aug52#1,329Sep18 daysOct15 daysNov19 daysDec44#1,837
2024too few days for a mean (a year needs 257)234 days measured
Jan58#633Feb44#1,147Mar15 daysApr46#1,281May38#1,737Jun47#1,170Jul5 daysAug7 daysSepnoneOct12 daysNov55#644Dec46#1,275
202351 for the year300 days measured647th of 1,355 in the world
Jan14 daysFeb54#637Mar41#582Apr47#732May49#683Jun51#922Jul18 daysAug17 daysSep20 daysOct38#1,186Nov47#997Dec54#589
Each square is a month's mean PM2.5 in US AQI from Algeciras'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 Algeciras marked; each year, the year's.
Good0–50
Moderate51–100
Unhealthy for 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

23 months
MonthWhy
Oct 20265 of 12 days measured; a month needs 9. The others: 2 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 20262 of 31 days measured; a month needs 22. The others: 29 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 20264 of 28 days measured; a month needs 20. The others: 24 with under 18 hours of readings or readings that failed our checks.
Jan 202616 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Nov 202519 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
Oct 202515 of 31 days measured; a month needs 22. The others: 16 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.
Jun 202516 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks.
May 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Mar 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 202412 of 31 days measured; a month needs 22. The others: 19 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 20247 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks.
Jul 20245 of 31 days measured; a month needs 22. The others: 26 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 202320 of 30 days measured; a month needs 21. The others: 10 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 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 202314 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 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.

Algeciras's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 5812.6 µg/m³31 of 31633rdof 2,385Spain, France and 2 more countries, December 2023 to January 2024
November 2024 5511.4 µg/m³27 of 30644thof 2,624–
February 2023 5410.6 µg/m³28 of 28637thof 1,129–
December 2023 5410.6 µg/m³29 of 31589thof 2,247Spain, France and 2 more countries, December 2023 to January 2024
August 2026 5310.4 µg/m³24 of 31807thof 2,896–
August 2025 529.6 µg/m³23 of 311,329thof 2,901–

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.

Algeciras's worst days

DayUS AQIEpisode
10 May 2023 10838.2 µg/m³–
10 Apr 2023 9029.8 µg/m³Madrid, Andalusia and Castille-La Mancha, Spain, April 2023
7 Apr 2024 8828.8 µg/m³Spain, April 2024
29 Dec 2023 8125.0 µg/m³Spain, France and 2 more countries, December 2023 to January 2024
4 Apr 2024 8024.8 µg/m³–
16 Jan 2024 8024.7 µg/m³–
9 Jan 2025 7823.6 µg/m³–
19 Dec 2024 7823.4 µg/m³–
15 Jan 2024 7723.1 µg/m³–
7 Nov 2024 7622.7 µg/m³–

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, Algeciras, 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/algeciras/history (accessed 13 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.

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

Updated 2026-10-13 03:07 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).