SmogRank / World / North America / United States / Tennessee
Most polluted cities in Tennessee, United States
14 measured cities, this year; 14 above the WHO annual guideline. Worst: Chattanooga at 10.2 µg/m³, #940 in the world.
About 0 people in this city breathed unhealthy air on an average day so far this year.
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.
- 1Knoxville 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
Tennessee 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 |
|---|---|
| Memphis | ≈ 7 µg/m³ |
| Clarksville | ≈ 6 µg/m³ |
| Murfreesboro | ≈ 6 µg/m³ |
| East Chattanooga | ≈ 8 µg/m³ |
| Franklin | ≈ 8 µg/m³ |
| Cordova | ≈ 5 µg/m³ |
| Johnson City | ≈ 5 µg/m³ |
| Collierville | ≈ 5 µg/m³ |
| Smyrna | ≈ 7 µg/m³ |
| Cleveland | ≈ 6 µg/m³ |
| Brentwood | ≈ 8 µg/m³ |
| Germantown | ≈ 7 µg/m³ |
| Hermitage | ≈ 8 µg/m³ |
| Spring Hill | ≈ 6 µg/m³ |
| La Vergne | ≈ 7 µg/m³ |
| Gallatin | ≈ 6 µg/m³ |
| Mount Juliet | ≈ 6 µg/m³ |
| Lebanon | ≈ 6 µg/m³ |
| Morristown | ≈ 6 µg/m³ |
| Oak Ridge | ≈ 8 µg/m³ |
| Bristol | ≈ 4 µg/m³ |
| Ellendale | ≈ 7 µg/m³ |
| Farragut | ≈ 8 µg/m³ |
| Shelbyville | ≈ 5 µg/m³ |
| East Ridge | ≈ 8 µg/m³ |
| Tullahoma | ≈ 6 µg/m³ |
| Goodlettsville | ≈ 6 µg/m³ |
| Springfield | ≈ 7 µg/m³ |
| Sevierville | ≈ 8 µg/m³ |
| Dickson | ≈ 6 µg/m³ |
| East Brainerd | ≈ 8 µg/m³ |
| Greeneville | ≈ 5 µg/m³ |
Bad-air episodes in Tennessee
- Eastern United States, March 202626 March 2026, 1 day13 cities44 µg/m³peak, Chattanooga
- Eastern United States, February 202625 February 2026, 1 day9 cities40 µg/m³peak, Wake Forest
- North-eastern United States, July 20254 to 5 July 2025, 2 days68 cities74 µg/m³peak, Lincolnwood
- Southern and eastern United States and Mexico, July and August 202431 July to 2 August 2024, 3 days71 cities47 µg/m³peak, Marion
- Eastern United States, March 202413 to 15 March 2024, 3 days40 cities53 µg/m³peak, Saint Andrews
- South-eastern United States, February 202421 to 22 February 2024, 2 days31 cities45 µg/m³peak, Douglas
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 Tennessee, United States, PM2.5, this year to 6 Oct 2026, 22:00 UTC, smogrank.com/us/region/tennessee?w=year.
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 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.