SmogRank / United States / Louisiana / Baton Rouge
Baton Rouge, month by month
Baton Rouge has a measured daily mean on 1,269 days since 1 January 2023. Its worst month was August 2024, at 59 US AQI (13.6 µg/m³), 226th of 2,010 cities on that month's world ranking. Its cleanest was May 2026, at 36 US AQI (6.4 µg/m³). 2025 averaged 50 US AQI (9.0 µg/m³), against 52 US AQI (9.4 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 | 2 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 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.
Baton Rouge's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2024 | 5913.6 µg/m³ | 226thof 2,010 | Southern and eastern United States and Mexico, July and August 2024 |
| July 2023 | 5812.6 µg/m³ | 328thof 1,432 | – |
| May 2023 | 5712.3 µg/m³ | 245thof 1,600 | – |
| August 2023 | 5611.9 µg/m³ | 355thof 1,980 | – |
| October 2024 | 5611.7 µg/m³ | 406thof 2,020 | – |
| June 2023 | 5511.3 µg/m³ | 611thof 1,603 | – |
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.
Baton Rouge's worst days
| Day | US AQI | Episode |
|---|---|---|
| 4 Oct 2023 | 9331.4 µg/m³ | South-eastern United States, October 2023 |
| 27 Aug 2023 | 8828.8 µg/m³ | – |
| 1 Jan 2023 | 8728.6 µg/m³ | – |
| 1 Aug 2024 | 8527.4 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 21 Aug 2024 | 8527.2 µg/m³ | – |
| 31 Jul 2024 | 8426.6 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 9 May 2024 | 8225.6 µg/m³ | Southern United States and Mexico, 7 to 10 May 2024 |
| 5 Jan 2026 | 8024.8 µg/m³ | – |
| 23 May 2023 | 8024.5 µg/m³ | – |
| 22 May 2023 | 7823.4 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, Baton Rouge, 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/baton-rouge/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.
Baton Rouge 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).