SmogRank / Spain / Galicia / Lalín

Lalín, month by month

Lalín has a measured daily mean on 633 days since 11 January 2023. Its worst month was February 2023, at 54 US AQI (10.9 µg/m³), 615th of 1,129 cities on that month's world ranking. Its cleanest was November 2025, at 16 US AQI (2.9 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)86 days measured
Jan26#2,399Feb8 daysMarnoneAprnoneMaynoneJun1 dayJul17 daysAug14 daysSep20 daysOct3 days
202529 for the year287 days measured2,503rd of 2,681 in the world
Jan20 daysFeb17 daysMar37#2,154Apr30#2,443May32#2,014Jun18 daysJul17#2,849Aug52#1,374Sep22#2,957Oct19 daysNov16#2,667Dec24#2,809
2024too few days for a mean (a year needs 257)205 days measured
Jan3 daysFeb34#1,803Mar12 daysApr29#1,887May26#2,340Jun23#2,355Jul13 daysAug7 daysSepnoneOct13 daysNov34#1,975Dec47#1,242
2023too few days for a mean (a year needs 256)55 days measured
Jan7 daysFeb54#615Mar19 daysApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Lalín'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 Lalín 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

30 months
MonthWhy
Oct 20263 of 11 days measured; a month needs 8. The others: 1 with no readings from the monitors, 7 with readings for part of the day (a day needs 18 hours).
Sep 202620 of 30 days measured; a month needs 21. The others: 9 with readings for part of the day (a day needs 18 hours), 1 with readings left out by our checks.
Aug 202614 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Jul 202617 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Jun 20261 of 30 days measured; a month needs 21. The others: 29 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 20268 of 28 days measured; a month needs 20. The others: 20 with under 18 hours of readings or readings that failed our checks.
Oct 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jun 202518 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Feb 202517 of 28 days measured; a month needs 20. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jan 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Oct 202413 of 31 days measured; a month needs 22. The others: 18 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 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 202412 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Jan 20243 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 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.
Jan 20237 of 31 days measured; a month needs 22. The others: 14 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.

Lalín's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2023 5410.9 µg/m³25 of 28615thof 1,129–
August 2025 529.4 µg/m³30 of 311,374thof 2,901Spain, Portugal and Andorra, August 2025
December 2024 478.4 µg/m³26 of 311,242ndof 2,616–
March 2025 376.7 µg/m³25 of 312,154thof 2,862–
February 2024 346.1 µg/m³28 of 291,803rdof 2,486–
November 2024 346.1 µg/m³26 of 301,975thof 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.

Lalín's worst days

DayUS AQIEpisode
15 Aug 2025 15966.5 µg/m³Spain, Portugal and Andorra, August 2025
16 Aug 2025 15256.7 µg/m³Spain, Portugal and Andorra, August 2025
21 Feb 2023 7622.4 µg/m³–
20 Feb 2023 6918.8 µg/m³–
6 Feb 2024 6717.9 µg/m³–
14 Aug 2025 6617.4 µg/m³Spain, Portugal and Andorra, August 2025
19 Feb 2023 6416.0 µg/m³–
16 Feb 2023 6315.7 µg/m³–
20 Mar 2025 6114.4 µg/m³–
31 Oct 2024 6014.1 µg/m³–

Daily means, the highest since 11 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, Lalín, Spain, 11 Jan 2023 – 6 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/lalin/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.

Lalín 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).