SmogRank / France / Île-de-France / Sainte-Geneviève-des-Bois

Sainte-Geneviève-des-Bois, month by month

Sainte-Geneviève-des-Bois has a measured daily mean on 398 days since 11 January 2023. Its worst month was February 2023, at 79 US AQI (24.2 µg/m³), 61st of 1,129 cities on that month's world ranking. Its cleanest was August 2023, at 50 US AQI (9.0 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)14 days measured
Jan4 daysFebnoneMarnoneAprnoneMay2 daysJun1 dayJulnoneAugnoneSep1 dayOct6 days
2025too few days for a mean (a year needs 256)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2024too few days for a mean (a year needs 257)65 days measured
Jan71#285Feb55#558Mar10 daysApr2 daysMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
202358 for the year319 days measured171st of 1,355 in the world
Jan5 daysFeb79#61Mar57#144Apr57#246May56#279Jun60#433Jul51#751Aug50#777Sep57#320Oct56#196Nov59#208Dec60#319
Each square is a month's mean PM2.5 in US AQI from Sainte-Geneviève-des-Bois'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 Sainte-Geneviève-des-Bois 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

33 months
MonthWhy
Oct 20266 of 12 days measured; a month needs 9. The others: 6 with readings for part of the day (a day needs 18 hours).
Sep 20261 of 30 days measured; a month needs 21. The others: 28 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks.
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2026No day measured. The others: 31 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 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 2026No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 20264 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Dec 2025No day measured.
Nov 2025No day measured.
Oct 2025No day measured.
Sep 2025No day measured.
Aug 2025No day measured.
Jul 2025No day measured.
Jun 2025No day measured.
May 2025No day measured.
Apr 2025No day measured.
Mar 2025No day measured.
Feb 2025No day measured.
Jan 2025No day measured.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2024No day measured. The others: 31 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 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2024No day measured. The others: 30 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 20235 of 31 days measured; a month needs 22. The others: 5 missing from OpenAQ's archive, 11 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.

Sainte-Geneviève-des-Bois's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2023 7924.2 µg/m³25 of 2861stof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
January 2024 7119.6 µg/m³29 of 31285thof 2,385Europe, 28 to 31 January 2024
Europe, 8 to 27 January 2024and 1 more
June 2023 6014.1 µg/m³30 of 30433rdof 1,603–
December 2023 6013.9 µg/m³29 of 31319thof 2,247France, Spain and Germany, December 2023
France, Belgium and 2 more countries, November and December 2023
November 2023 5913.3 µg/m³30 of 30208thof 2,243France, Belgium and 2 more countries, November and December 2023
March 2023 5712.4 µg/m³26 of 31144thof 911Europe, 28 February to 4 March 2023

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.

Sainte-Geneviève-des-Bois's worst days

DayUS AQIEpisode
14 Feb 2023 15156.2 µg/m³Europe, 6 to 25 February 2023
15 Feb 2023 14452.9 µg/m³Europe, 6 to 25 February 2023
9 Feb 2023 13247.9 µg/m³Europe, 6 to 25 February 2023
10 Feb 2023 13147.6 µg/m³Europe, 6 to 25 February 2023
13 Feb 2023 12344.4 µg/m³Europe, 6 to 25 February 2023
2 Dec 2023 11440.6 µg/m³France, Belgium and 2 more countries, November and December 2023
16 Jan 2024 11039.0 µg/m³Europe, 8 to 27 January 2024
Western Europe, January 2024
2 Mar 2023 10637.6 µg/m³Europe, 28 February to 4 March 2023
29 Nov 2023 10235.8 µg/m³–
11 Jan 2024 9633.2 µg/m³Europe, 8 to 27 January 2024

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, Sainte-Geneviève-des-Bois, 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/sainte-genevieve-des-bois/history (accessed 13 Oct 2026).

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Sainte-Geneviève-des-Bois now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-13 04:07 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).