SmogRank / United States / Mississippi / Hattiesburg
Hattiesburg, month by month
Hattiesburg has a measured daily mean on 1,361 days since 1 January 2023. Its worst month was October 2024, at 59 US AQI (13.6 µg/m³), 311th of 2,020 cities on that month's world ranking. Its cleanest was May 2025, at 34 US AQI (6.2 µg/m³). 2025 averaged 48 US AQI (8.6 µg/m³), against 51 US AQI (9.2 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
Hattiesburg's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| October 2024 | 5913.6 µg/m³ | 311thof 2,020 | – |
| August 2023 | 5913.2 µg/m³ | 263rdof 1,980 | – |
| November 2023 | 5813.1 µg/m³ | 220thof 2,243 | – |
| March 2023 | 5712.5 µg/m³ | 143rdof 911 | Eastern United States, March 2023 |
| May 2023 | 5712.5 µg/m³ | 234thof 1,600 | Southern United States, May 2023 |
| February 2026 | 5712.3 µg/m³ | 990thof 2,866 | – |
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.
Hattiesburg's worst days
| Day | US AQI | Episode |
|---|---|---|
| 24 Dec 2024 | 10135.5 µg/m³ | – |
| 13 Feb 2026 | 9935.1 µg/m³ | – |
| 3 Mar 2025 | 9734.0 µg/m³ | – |
| 4 Oct 2023 | 9331.8 µg/m³ | South-eastern United States, October 2023 |
| 8 Mar 2023 | 9331.6 µg/m³ | – |
| 24 Oct 2025 | 9130.6 µg/m³ | – |
| 25 Nov 2023 | 9029.9 µg/m³ | – |
| 21 Mar 2023 | 8627.7 µg/m³ | Eastern United States, March 2023 |
| 22 May 2023 | 8225.6 µg/m³ | Southern United States, May 2023 |
| 6 Mar 2023 | 8125.4 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, Hattiesburg, 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/hattiesburg/history (accessed 13 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.
Hattiesburg now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 01:07 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).