SmogRank / United States / Alabama / Bessemer
Bessemer, month by month
Bessemer has a measured daily mean on 849 days since 1 January 2023. Its worst month was October 2024, at 55 US AQI (11.3 µg/m³), 433rd of 2,020 cities on that month's world ranking. Its cleanest was May 2025, at 28 US AQI (5.0 µg/m³).
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
18 months
| Month | Why |
|---|---|
| Jul 2025 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| May 2024 | 11 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | No day measured. The others: 1 missing from OpenAQ's archive, 30 with under 18 hours of readings or readings that failed our checks. |
| Feb 2024 | No day measured. The others: 1 missing from OpenAQ's archive, 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Dec 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Sep 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | No day measured. The others: 1 missing from OpenAQ's archive, 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. |
| Feb 2023 | 1 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 2 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.
Bessemer's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| October 2024 | 5511.3 µg/m³ | 433rdof 2,020 | – |
| March 2026 | 5511.1 µg/m³ | 1,401stof 2,971 | South-eastern United States, March 2026 |
| February 2026 | 5410.5 µg/m³ | 1,290thof 2,866 | Alabama, Georgia and South Carolina, United States, February 2026 |
| February 2025 | 5310.4 µg/m³ | 1,145thof 2,633 | – |
| July 2026 | 529.6 µg/m³ | 1,469thof 2,784 | – |
| August 2024 | 519.3 µg/m³ | 774thof 2,010 | Southern and eastern United States and Mexico, July and August 2024 |
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.
Bessemer's worst days
| Day | US AQI | Episode |
|---|---|---|
| 2 Aug 2024 | 8627.7 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 14 Feb 2026 | 8527.4 µg/m³ | Alabama, Georgia and South Carolina, United States, February 2026 |
| 20 Mar 2026 | 8125.3 µg/m³ | South-eastern United States, March 2026 |
| 24 Oct 2024 | 8024.5 µg/m³ | – |
| 3 Feb 2026 | 7924.0 µg/m³ | – |
| 25 Oct 2024 | 7823.8 µg/m³ | – |
| 19 Mar 2026 | 7421.2 µg/m³ | South-eastern United States, March 2026 |
| 30 Jul 2026 | 7320.9 µg/m³ | – |
| 1 Aug 2024 | 7320.8 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 28 Mar 2025 | 7320.8 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, Bessemer, 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/bessemer/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.
Bessemer now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).