SmogRank / United States / Tennessee / Columbia
Columbia, month by month
Columbia, Tennessee has a measured daily mean on 1,345 days since 1 January 2023. Its worst month was June 2023, at 57 US AQI (12.4 µg/m³), 522nd of 1,603 cities on that month's world ranking. Its cleanest was October 2025, at 26 US AQI (4.7 µg/m³). 2025 averaged 37 US AQI (6.7 µg/m³), against 38 US AQI (6.8 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
Columbia's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| June 2023 | 5712.4 µg/m³ | 522ndof 1,603 | – |
| July 2023 | 5310.4 µg/m³ | 619thof 1,432 | United States and Canada, July 2023 |
| February 2026 | 519.3 µg/m³ | 1,589thof 2,866 | – |
| August 2024 | 519.2 µg/m³ | 804thof 2,010 | Southern and eastern United States and Mexico, July and August 2024 |
| March 2026 | 498.9 µg/m³ | 1,903rdof 2,971 | – |
| May 2023 | 468.3 µg/m³ | 862ndof 1,600 | – |
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.
Columbia's worst days
| Day | US AQI | Episode |
|---|---|---|
| 17 Jul 2023 | 9934.6 µg/m³ | United States and Canada, July 2023 |
| 16 Jul 2023 | 8828.8 µg/m³ | United States and Canada, July 2023 |
| 1 Aug 2024 | 8125.0 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 18 Apr 2025 | 7823.6 µg/m³ | – |
| 17 Jun 2023 | 7823.5 µg/m³ | – |
| 19 Apr 2023 | 7622.6 µg/m³ | – |
| 2 Aug 2024 | 7421.7 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 8 Jun 2023 | 7421.2 µg/m³ | – |
| 10 Jun 2023 | 7320.8 µg/m³ | – |
| 4 Feb 2026 | 7220.2 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, Columbia, Tennessee, 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/columbia-tennessee/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.
Columbia now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 02:07 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).