SmogRank / France / Centre-Val de Loire / Orléans

Orléans, month by month

Orléans, Centre-Val de Loire has a measured daily mean on 698 days since 11 January 2023. Its worst month was February 2023, at 76 US AQI (22.3 µg/m³), 86th of 1,129 cities on that month's world ranking. Its cleanest was September 2026, at 29 US AQI (5.2 µg/m³).

Every month since 2023

202644 so far248 days measured1,826th of 2,793 in the world
Jan16 daysFeb41#2,138Mar60#947Apr36#2,078May35#1,849Jun18 daysJul46#1,796Aug33#2,509Sep29#2,221Oct29#2,075
2025too few days for a mean (a year needs 256)252 days measured
Jan6 daysFeb19 daysMar60#1,043Apr47#1,623May17 daysJun14 daysJul32#2,420Aug14 daysSep30#2,391Oct19 daysNov45#1,509Dec57#963
2024too few days for a mean (a year needs 257)142 days measured
Jan3 daysFeb50#839Mar10 daysApr2 daysMaynoneJun2 daysJul30#2,159Aug14 daysSepnoneOct13 daysNov57#565Dec16 days
2023too few days for a mean (a year needs 256)56 days measured
Jan7 daysFeb76#86Mar20 daysApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Orléans'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 Orléans 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

28 months
MonthWhy
Jun 202618 of 30 days measured; a month needs 21. The others: 12 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.
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.
Aug 202514 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Jun 202514 of 30 days measured; a month needs 21. The others: 16 with under 18 hours of readings or readings that failed our checks.
May 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 202519 of 28 days measured; a month needs 20. The others: 9 with under 18 hours of readings or readings that failed our checks.
Jan 20256 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks.
Dec 202416 of 31 days measured; a month needs 22. The others: 15 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 202414 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Jun 20242 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
May 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20242 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
Mar 202410 of 31 days measured; a month needs 22. The others: 21 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 202320 of 31 days measured; a month needs 22. The others: 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.

Orléans's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2023 7622.3 µg/m³25 of 2886thof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
March 2026 6014.0 µg/m³31 of 31947thof 2,971Europe, 18 to 25 March 2026
Europe, 1 to 12 March 2026
March 2025 6013.9 µg/m³25 of 311,043rdof 2,862Germany, Poland and 25 more countries, March 2025
Europe, 14 February to 1 March 2025
November 2024 5712.1 µg/m³27 of 30565thof 2,624–
December 2025 5712.1 µg/m³28 of 31963rdof 3,006Europe, December 2025 to January 2026
February 2024 509.0 µg/m³27 of 29839thof 2,486–

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.

Orléans's worst days

DayUS AQIEpisode
10 Feb 2023 16372.7 µg/m³Europe, 6 to 25 February 2023
9 Feb 2023 15257.1 µg/m³Europe, 6 to 25 February 2023
11 Feb 2023 15155.5 µg/m³Europe, 6 to 25 February 2023
13 Feb 2023 12746.0 µg/m³Europe, 6 to 25 February 2023
3 Mar 2023 12445.0 µg/m³Europe, 28 February to 4 March 2023
1 Jan 2026 11340.2 µg/m³Europe, December 2025 to January 2026
2 Mar 2023 11039.3 µg/m³Europe, 28 February to 4 March 2023
21 Mar 2026 10235.9 µg/m³Europe, 18 to 25 March 2026
14 Jul 2026 9934.8 µg/m³–
5 Mar 2025 9934.7 µg/m³Germany, Poland and 25 more countries, March 2025

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, Orléans, Centre-Val de Loire, France, 11 Jan 2023 – 12 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/fr/orleans/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.

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

Updated 2026-10-12 22:07 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).