Air quality in Chattanooga, Tennessee, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for Chattanooga, Tennessee, United States of America
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Chattanooga, Tennessee is currently classified as Moderate. The primary pollutant measured is PM2.5 (fine particles), with a reported concentration of 20.3 µg/m³. Only one valid measurement contributes to this assessment, and no PM10 value is available.
Data are shown via OpenAQ. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.
Latest sensor values
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
What the data includes
The current station data listed for this city is focused on particulate matter (PM). Only PM2.5 measurements are available from three monitoring locations, giving a modest snapshot of airborne fine particles across Chattanooga. The most recent reading was recorded on 2026-02-11 00:00 UTC at the Siskin Dr site, where the concentration reached 20.3 µg/m³. Across all stations, PM2.5 values range from a low of 14.9 µg/m³ to a high of 20.3 µg/m³, with a median of 15.8 µg/m³; the 10th percentile sits near 15.1 µg/m³ and the 90th percentile around 19.4 µg/m³.
Only one of the three rows contains data that is less than seven days old, while the remaining two are older, indicating limited recent coverage. Because the dataset includes just a single pollutant and a small number of stations, it provides only a partial picture of air quality in Chattanooga; conditions can differ noticeably across neighborhoods and over time.
Learn more about sources and filtering: About the data.
Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)
Latest sensor values (bars)
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
Data notes
The current data for Chattanooga reflects a single valid measurement and was Updated today (timestamp 2026‑02‑11T00:00:00+00:00). This snapshot represents conditions at the time of collection and may not capture variations across different neighborhoods or times of day within the city. Users should consider that air quality can change rapidly depending on location, weather, and local activities.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Riverside | pm25 | 14.9 | µg/m³ | 2023-05-09 13:00 UTC |
| 3A-PM2.5 | pm25 | 15.8 | µg/m³ | 2023-05-09 15:00 UTC |
| Siskin Dr | pm25 | 20.3 | µg/m³ | 2026-02-11 00:00 UTC |