SmogRank / United States / Alabama / Fairfield
Fairfield, month by month
Fairfield, Alabama has a measured daily mean on 1,106 days since 1 January 2023. Its worst month was June 2023, at 64 US AQI (15.9 µg/m³), 358th of 1,603 cities on that month's world ranking. Its cleanest was May 2026, at 16 US AQI (2.9 µg/m³). 2025 averaged 43 US AQI (7.7 µg/m³), against 52 US AQI (9.8 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
Months without a mean, and why
10 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. The others: 11 with no readings from the monitor. |
| Sep 2026 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2025 | 12 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jun 2024 | 17 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 9 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 2 with under 18 hours of readings or readings that failed our checks. |
| Feb 2023 | 2 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 21 of 31 days measured; a month needs 22. The others: 6 missing from OpenAQ's archive, 4 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.
Fairfield's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| June 2023 | 6415.9 µg/m³ | 358thof 1,603 | Eastern United States and Canada, June and July 2023 Eastern United States and Canada, May and June 2023 |
| July 2023 | 6214.8 µg/m³ | 154thof 1,432 | United States and Canada, July 2023 Eastern United States and Canada, June and July 2023 |
| September 2023 | 6014.1 µg/m³ | 209thof 2,176 | – |
| February 2024 | 5812.6 µg/m³ | 427thof 2,486 | South-eastern United States, February 2024 |
| May 2023 | 5712.2 µg/m³ | 252ndof 1,600 | Eastern United States and Canada, May and June 2023 |
| August 2023 | 5712.1 µg/m³ | 329thof 1,980 | – |
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.
Fairfield's worst days
| Day | US AQI | Episode |
|---|---|---|
| 17 Jul 2023 | 11340.4 µg/m³ | United States and Canada, July 2023 |
| 30 Jun 2023 | 10235.8 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 20 Apr 2023 | 9633.2 µg/m³ | – |
| 18 Jul 2023 | 8728.3 µg/m³ | United States and Canada, July 2023 |
| 21 Feb 2024 | 8628.0 µg/m³ | South-eastern United States, February 2024 |
| 28 Jul 2023 | 8627.9 µg/m³ | – |
| 24 Jun 2023 | 8527.2 µg/m³ | – |
| 27 Jul 2023 | 8426.7 µg/m³ | – |
| 14 Feb 2026 | 8225.8 µg/m³ | Alabama, Georgia and South Carolina, United States, February 2026 |
| 21 Mar 2024 | 8125.3 µg/m³ | Georgia, Alabama and South Carolina, United States, March 2024 |
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, Fairfield, Alabama, United States, 1 Jan 2023 – 31 Aug 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/fairfield-alabama/history (accessed 12 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.
Fairfield now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 19:07 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).