Dallas Air Quality in March
Across 2019–2025, Dallas's March air quality had a median AQI of 54 (Moderate) over 217 monitored days in the Dallas-Fort Worth-Arlington, TX area. 2.8% of March days (6 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 64.1% of days. The cleanest March on record here was 2021 (median AQI 52, 0 days above 100) and the worst was 2025 (median 55, 3 days above 100, peak AQI 304).
- Good: 32.7%
- Moderate: 64.5%
- Unhealthy for Sensitive Groups: 2.3%
- Unhealthy or worse: 0.5%
Extra Protection for Dallas Homes
Air quality in Dallas is moderate (AQI 58), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
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How is the air in Dallas in March?
Moderate on a typical day: median AQI 54 across 2019–2025, with 2.8% of March days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓32.7% of March days were Good (AQI 0–50), 64.5% Moderate (51–100).
- ✓6 days of 217 reached AQI 101+; the March peak was 304.
- ✓Best March: 2021; worst March: 2025.
Frequently asked questions
What is the air quality like in Dallas in March?▾
Across 2019–2025, the median daily AQI in Dallas in March was 54 (Moderate). 32.7% of days were Good, 64.5% Moderate, and 2.8% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is March a good time for outdoor exercise in Dallas?▾
A typical March day in Dallas is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 36 of March days (2.8%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Dallas's March air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 64.1% of March days in Dallas. The highest March AQI recorded in 2019–2025 was 304 (Hazardous), in 2025.
Dallas March air quality, year by year
Dallas March air quality by year (Dallas-Fort Worth-Arlington, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 55 | 0 | 87 | PM2.5 |
| 2020 | 31 | 53 | 0 | 80 | PM2.5 |
| 2021cleanest | 31 | 52 | 0 | 74 | PM2.5 |
| 2022 | 31 | 51 | 3 | 122 | O3 |
| 2023 | 31 | 55 | 0 | 73 | PM2.5 |
| 2024 | 31 | 54 | 0 | 73 | PM2.5 |
| 2025worst | 31 | 55 | 3 | 304 | O3 |
What March air means in Dallas
A typical March day in Dallas is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 36 of March days (2.8%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
March's median AQI of 54 is below Dallas's whole-year median of 58, making it one of the area's cleaner periods. Nationally, the median March AQI across every EPA metro area (102,455 metro-days, 2019–2025) is 42, so Dallas runs above the national March norm; 2.8% of its March days topped AQI 100 versus 0.4% nationally (above average).
March is part of Dallas's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Dallas
The latest EPA AirNow observation puts Dallas's AQI at 58 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Dallas air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Dallas-Fort Worth-Arlington, TX), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.