SmogRank / Luxembourg / Esch-sur-Alzette / Esch-sur-Alzette

Esch-sur-Alzette, month by month

Esch-sur-Alzette has a measured daily mean on 905 days since 4 January 2023. Its worst month was February 2025, at 58 US AQI (13.1 µg/m³), 952nd of 2,633 cities on that month's world ranking. Its cleanest was September 2026, at 31 US AQI (5.5 µg/m³).

Every month since 2023

202644 so far254 days measured1,876th of 2,793 in the world
Jan57#917Feb49#1,730Mar57#1,154Apr36#2,078May33#1,943Jun42#1,221Jul40#2,098Aug42#1,859Sep31#2,060Oct33#1,814
2025too few days for a mean (a year needs 256)229 days measured
Jan20 daysFeb58#952Mar21 daysApr20 daysMay12 daysJun18 daysJul20 daysAug43#1,882Sep18 daysOct8 daysNov19 daysDec46#1,757
2024too few days for a mean (a year needs 257)245 days measured
Jan55#767Feb37#1,616Mar15 daysApr33#1,711May41#1,578Jun40#1,624Jul38#1,765Aug10 daysSepnoneOct13 daysNov44#1,360Dec46#1,304
2023too few days for a mean (a year needs 256)177 days measured
Jan38#868Feb15 daysMar54#214Apr50#605May19 daysJun18 daysJul19 daysAug20 daysSep6 daysOct1 dayNov5 daysDec2 days
Each square is a month's mean PM2.5 in US AQI from Esch-sur-Alzette'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 Esch-sur-Alzette 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

22 months
MonthWhy
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 20258 of 31 days measured; a month needs 22. The others: 23 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.
Jul 202520 of 31 days measured; a month needs 22. The others: 11 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.
May 202512 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Apr 202520 of 30 days measured; a month needs 21. The others: 10 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.
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 202410 of 31 days measured; a month needs 22. The others: 21 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.
Dec 20232 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Nov 20235 of 30 days measured; a month needs 21. The others: 25 with under 18 hours of readings or readings that failed our checks.
Oct 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Sep 20236 of 30 days measured; a month needs 21. The others: 24 with under 18 hours of readings or readings that failed our checks.
Aug 202320 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jul 202319 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jun 202318 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
May 202319 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Feb 202315 of 28 days measured; a month needs 20. The others: 13 missing from OpenAQ's archive.

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

Esch-sur-Alzette's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2025 5813.1 µg/m³21 of 28952ndof 2,633Europe, 1 to 14 February 2025
March 2026 5712.3 µg/m³24 of 311,154thof 2,971–
January 2026 5712.2 µg/m³25 of 31917thof 2,617Europe, January and February 2026
January 2024 5511.3 µg/m³29 of 31767thof 2,385–
March 2023 5410.7 µg/m³23 of 31214thof 911–
April 2023 509.0 µg/m³26 of 30605thof 1,622–

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.

Esch-sur-Alzette's worst days

DayUS AQIEpisode
16 Aug 2026 10336.4 µg/m³Germany, Belgium and 2 more countries, August 2026
25 Jan 2026 10235.8 µg/m³Europe, January and February 2026
20 Jan 2025 9331.6 µg/m³Germany, France and 19 more countries, January 2025
15 Feb 2023 9029.8 µg/m³Europe, 6 to 25 February 2023
10 Feb 2025 8628.0 µg/m³Europe, 1 to 14 February 2025
14 Feb 2023 8527.3 µg/m³Europe, 6 to 25 February 2023
19 Jan 2025 8225.7 µg/m³Germany, France and 19 more countries, January 2025
22 Jan 2026 8125.3 µg/m³Europe, January and February 2026
20 Jan 2024 8024.8 µg/m³–
28 Dec 2024 7723.2 µg/m³–

Daily means, the highest since 4 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, Esch-sur-Alzette, Luxembourg, 4 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/lu/esch-sur-alzette/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.

Esch-sur-Alzette now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 21:07 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).