SmogRank / United States / Mississippi / Hernando
Hernando, month by month
Hernando has a measured daily mean on 1,360 days since 1 January 2023. Its worst month was June 2023, at 68 US AQI (18.0 µg/m³), 304th of 1,603 cities on that month's world ranking. Its cleanest was May 2026, at 33 US AQI (5.9 µg/m³). 2025 averaged 43 US AQI (7.8 µg/m³), against 49 US AQI (8.9 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
Hernando's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| June 2023 | 6818.0 µg/m³ | 304thof 1,603 | Eastern United States and Canada, June and July 2023 Eastern United States and Canada, May and June 2023 |
| October 2024 | 6315.8 µg/m³ | 230thof 2,020 | – |
| May 2023 | 6114.7 µg/m³ | 149thof 1,600 | Eastern United States and Canada, May and June 2023 Southern United States, May 2023 |
| September 2023 | 6114.7 µg/m³ | 185thof 2,176 | – |
| October 2023 | 6014.1 µg/m³ | 123rdof 2,012 | South-eastern United States, October 2023 |
| August 2024 | 6014.0 µg/m³ | 209thof 2,010 | Southern and eastern United States and Mexico, July and August 2024 |
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.
Hernando's worst days
| Day | US AQI | Episode |
|---|---|---|
| 5 Oct 2023 | 11139.7 µg/m³ | South-eastern United States, October 2023 |
| 4 Oct 2023 | 11039.3 µg/m³ | South-eastern United States, October 2023 |
| 1 Aug 2024 | 10336.2 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 7 Jun 2023 | 9733.8 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 9 Jun 2023 | 9532.5 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 29 Oct 2024 | 9331.6 µg/m³ | – |
| 8 Sept 2023 | 9231.0 µg/m³ | – |
| 22 May 2023 | 9230.9 µg/m³ | Southern United States, May 2023 |
| 25 Oct 2024 | 9130.7 µg/m³ | – |
| 27 Jun 2023 | 8929.5 µg/m³ | Eastern United States and Canada, June and July 2023 |
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, Hernando, 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/hernando/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.
Hernando now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 17:07 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).