SmogRank / United States / Georgia / Columbus
Columbus, month by month
Columbus, Georgia has a measured daily mean on 1,180 days since 1 January 2023. Its worst month was March 2025, at 66 US AQI (16.9 µg/m³), 777th of 2,862 cities on that month's world ranking. Its cleanest was October 2025, at 30 US AQI (5.4 µg/m³). 2025 averaged 51 US AQI (9.2 µg/m³), against 53 US AQI (10.1 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
Months without a mean, and why
7 months
| Month | Why |
|---|---|
| Nov 2025 | 19 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | 1 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2023 | No day measured. The others: 3 missing from OpenAQ's archive, 27 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | No day measured. The others: 20 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 13 of 31 days measured; a month needs 22. The others: 2 missing from OpenAQ's archive, 16 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Columbus's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| March 2025 | 6616.9 µg/m³ | 777thof 2,862 | – |
| February 2024 | 6416.2 µg/m³ | 303rdof 2,486 | Georgia, Alabama and Tennessee, United States, February 2024 South-eastern United States, February 2024 |
| November 2023 | 6114.2 µg/m³ | 170thof 2,243 | Eastern United States and Canada, November 2023 |
| February 2026 | 6114.2 µg/m³ | 836thof 2,866 | Alabama, Georgia and South Carolina, United States, February 2026 |
| March 2026 | 6013.9 µg/m³ | 956thof 2,971 | Eastern United States, March 2026 South-eastern United States, March 2026 |
| February 2025 | 6013.7 µg/m³ | 933rdof 2,633 | Georgia, South Carolina and Alabama, United States, February 2025 |
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.
Columbus's worst days
| Day | US AQI | Episode |
|---|---|---|
| 27 Mar 2025 | 16676.5 µg/m³ | – |
| 14 Feb 2026 | 15865.6 µg/m³ | Alabama, Georgia and South Carolina, United States, February 2026 |
| 23 Mar 2025 | 15460.3 µg/m³ | – |
| 9 Feb 2026 | 15156.0 µg/m³ | – |
| 20 Mar 2026 | 12645.5 µg/m³ | South-eastern United States, March 2026 |
| 1 Jan 2024 | 12545.2 µg/m³ | – |
| 13 Mar 2024 | 12244.1 µg/m³ | Eastern United States, March 2024 |
| 22 Feb 2024 | 11742.1 µg/m³ | South-eastern United States, February 2024 |
| 14 Mar 2024 | 11541.3 µg/m³ | Eastern United States, March 2024 |
| 22 Mar 2025 | 11541.3 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, Columbus, Georgia, 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/columbus-georgia/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.
Columbus now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 01:07 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).