SmogRank / United States / Arkansas / Little Rock
Little Rock, month by month
Little Rock has a measured daily mean on 1,340 days since 1 January 2023. Its worst month was September 2023, at 65 US AQI (16.8 µg/m³), 138th of 2,176 cities on that month's world ranking. Its cleanest was January 2024, at 35 US AQI (6.3 µg/m³). 2025 averaged 52 US AQI (9.8 µg/m³), against 55 US AQI (11.0 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
Little Rock's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| September 2023 | 6516.8 µg/m³ | 138thof 2,176 | – |
| June 2023 | 6416.3 µg/m³ | 350thof 1,603 | Eastern United States and Canada, May and June 2023 |
| August 2024 | 6416.2 µg/m³ | 150thof 2,010 | Southern and eastern United States and Mexico, July and August 2024 |
| October 2024 | 6415.9 µg/m³ | 228thof 2,020 | – |
| August 2023 | 6214.8 µg/m³ | 198thof 1,980 | – |
| July 2023 | 6114.4 µg/m³ | 174thof 1,432 | – |
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.
Little Rock's worst days
| Day | US AQI | Episode |
|---|---|---|
| 15 Mar 2025 | 13951.0 µg/m³ | Eastern United States, March 2025 |
| 1 Aug 2024 | 10938.8 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 18 Oct 2024 | 9331.6 µg/m³ | – |
| 28 Jul 2023 | 9231.0 µg/m³ | – |
| 19 Sept 2023 | 9030.3 µg/m³ | – |
| 8 Sept 2023 | 9030.0 µg/m³ | – |
| 27 Feb 2023 | 9029.8 µg/m³ | – |
| 27 Aug 2024 | 8929.5 µg/m³ | – |
| 7 Jun 2023 | 8728.6 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 23 Sept 2023 | 8627.8 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, Little Rock, 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/little-rock/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.
Little Rock now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 19:07 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).