SmogRank / United States / Louisiana / New Orleans
New Orleans, month by month
New Orleans has a measured daily mean on 1,315 days since 1 January 2023. Its worst month was August 2023, at 58 US AQI (12.9 µg/m³), 272nd of 1,980 cities on that month's world ranking. Its cleanest was November 2024, at 27 US AQI (4.8 µg/m³). 2025 averaged 39 US AQI (7.0 µg/m³), against 39 US AQI (7.0 µg/m³) in 2024.
Every month since 2023
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
2 months
| Month | Why |
|---|---|
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
New Orleans's worst months
| Month | US AQI | World rank |
|---|---|---|
| August 2023 | 5812.9 µg/m³ | 272ndof 1,980 |
| July 2026 | 5611.9 µg/m³ | 909thof 2,784 |
| July 2023 | 5410.8 µg/m³ | 563rdof 1,432 |
| June 2026 | 5310.2 µg/m³ | 637thof 2,497 |
| August 2026 | 5310.0 µg/m³ | 895thof 2,896 |
| August 2024 | 529.7 µg/m³ | 682ndof 2,010 |
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.
New Orleans's worst days
| Day | US AQI | Episode |
|---|---|---|
| 1 Jan 2024 | 9432.0 µg/m³ | Texas, Louisiana and Mississippi, United States, January 2024 |
| 4 Oct 2023 | 8929.4 µg/m³ | South-eastern United States, October 2023 |
| 27 Aug 2023 | 8929.3 µg/m³ | – |
| 1 Jan 2023 | 8728.4 µg/m³ | – |
| 24 Aug 2023 | 7622.5 µg/m³ | – |
| 23 May 2023 | 7522.0 µg/m³ | – |
| 1 Jan 2026 | 7521.9 µg/m³ | – |
| 20 Jul 2026 | 7421.7 µg/m³ | – |
| 7 Jun 2025 | 7119.6 µg/m³ | – |
| 16 Jul 2026 | 7119.6 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, New Orleans, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/new-orleans/history (accessed 12 Oct 2026).
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.
New Orleans now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).