SmogRank / United States / Texas / Dallas
Dallas, month by month
Dallas has a measured daily mean on 1,112 days since 1 January 2023. Its worst month was May 2024, at 61 US AQI (14.5 µg/m³), 301st of 2,684 cities on that month's world ranking. Its cleanest was February 2025, at 37 US AQI (6.6 µg/m³). 2024 averaged 54 US AQI (10.7 µg/m³), against 53 US AQI (10.1 µg/m³) in 2023.
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
9 months
| Month | Why |
|---|---|
| Mar 2026 | 10 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks. |
| Feb 2026 | No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 2 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks. |
| Nov 2025 | 14 of 30 days measured; a month needs 21. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Sep 2025 | 13 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 9 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2025 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | No day measured. The others: 31 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.
Dallas's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| May 2024 | 6114.5 µg/m³ | 301stof 2,684 | Southern United States and Mexico, 19 to 28 May 2024 Southern United States and Mexico, 7 to 10 May 2024 |
| July 2026 | 6114.2 µg/m³ | 575thof 2,784 | – |
| August 2024 | 6013.8 µg/m³ | 219thof 2,010 | – |
| August 2026 | 5913.6 µg/m³ | 451stof 2,896 | – |
| August 2023 | 5813.0 µg/m³ | 268thof 1,980 | – |
| July 2023 | 5812.9 µg/m³ | 294thof 1,432 | – |
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.
Dallas's worst days
| Day | US AQI | Episode |
|---|---|---|
| 27 Feb 2023 | 12344.6 µg/m³ | Texas and Oklahoma, United States, February 2023 |
| 27 May 2024 | 11039.3 µg/m³ | Southern United States and Mexico, 19 to 28 May 2024 |
| 21 May 2024 | 9331.5 µg/m³ | Southern United States and Mexico, 19 to 28 May 2024 |
| 25 May 2024 | 9130.8 µg/m³ | Southern United States and Mexico, 19 to 28 May 2024 |
| 8 May 2024 | 8829.2 µg/m³ | Southern United States and Mexico, 7 to 10 May 2024 |
| 24 May 2024 | 8627.8 µg/m³ | Southern United States and Mexico, 19 to 28 May 2024 |
| 22 May 2024 | 8326.2 µg/m³ | Southern United States and Mexico, 19 to 28 May 2024 |
| 28 Apr 2026 | 8225.6 µg/m³ | Southern United States and Mexico, April 2026 |
| 15 Nov 2023 | 8225.5 µg/m³ | – |
| 26 May 2024 | 8024.4 µg/m³ | Southern United States and Mexico, 19 to 28 May 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, Dallas, 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/dallas/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.
Dallas now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).