SmogRank / World / North America / United States / Mississippi
Most polluted cities in Mississippi, United States
7 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Cleveland at 8.1 µg/m³, #964 in the world.
About 0 people in this city breathed unhealthy air on an average day over the last 30 days.
Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.
Cities coloured by their PM2.5 over the last 24 hours. Fires, smoke and ash: Oct 5, the newest UTC day mapped.
- 1Jackson 0
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
Estimated: cities without a monitor
Mississippi cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| West Gulfport | ≈ 6 µg/m³ |
| Southaven | ≈ 7 µg/m³ |
| Biloxi | ≈ 4 µg/m³ |
| Meridian | ≈ 5 µg/m³ |
| Olive Branch | ≈ 7 µg/m³ |
| Tupelo | ≈ 6 µg/m³ |
| Greenville | ≈ 6 µg/m³ |
| Horn Lake | ≈ 7 µg/m³ |
| Pearl | ≈ 6 µg/m³ |
| Madison | ≈ 7 µg/m³ |
| Starkville | ≈ 7 µg/m³ |
| Clinton | ≈ 6 µg/m³ |
| Ridgeland | ≈ 7 µg/m³ |
| Brandon | ≈ 6 µg/m³ |
| Columbus | ≈ 8 µg/m³ |
| Vicksburg | ≈ 5 µg/m³ |
| Oxford | ≈ 5 µg/m³ |
| Laurel | ≈ 12 µg/m³ |
| Gautier | ≈ 4 µg/m³ |
| Ocean Springs | ≈ 4 µg/m³ |
| Clarksdale | ≈ 7 µg/m³ |
| Long Beach | ≈ 5 µg/m³ |
| Greenwood | ≈ 8 µg/m³ |
| Natchez | ≈ 5 µg/m³ |
Bad-air episodes in Mississippi
- Eastern United States, March 202515 March 2025, 1 day68 cities70 µg/m³peak, East Saint Louis
- Southern and eastern United States and Mexico, July and August 202431 July to 2 August 2024, 3 days71 cities47 µg/m³peak, Marion
- Texas, Louisiana and Mississippi, United States, January 20241 January 2024, 1 day13 cities129 µg/m³peak, San Antonio
- South-eastern United States, October 20233 to 5 October 2023, 3 days58 cities54 µg/m³peak, Venice
- Eastern United States and Canada, June and July 202325 June to 2 July 2023, 8 days343 cities453 µg/m³peak, Saguenay
- Eastern United States and Canada, May and June 202331 May to 12 June 2023, 13 days317 cities253 µg/m³peak, Bethlehem
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
Use this board
SmogRank, most polluted cities in Mississippi, United States, PM2.5, last 30 days to 7 Oct 2026, 00:00 UTC, smogrank.com/us/region/mississippi?w=30d.
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.
Updated 2026-10-07 00:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.