Dallas Air Quality in July
Across 2019–2025, Dallas's July air quality had a median AQI of 68 (Moderate) over 217 monitored days in the Dallas-Fort Worth-Arlington, TX area. 19.8% of July days (43 of 217) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 50.2% of days. The cleanest July on record here was 2020 (median AQI 60, 1 day above 100) and the worst was 2024 (median 71, 9 days above 100, peak AQI 156).
- Good: 6.9%
- Moderate: 73.3%
- Unhealthy for Sensitive Groups: 18.4%
- Unhealthy or worse: 1.4%
Extra Protection for Dallas Homes
Air quality in Dallas is moderate (AQI 55), 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.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
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How is the air in Dallas in July?
Moderate on a typical day: median AQI 68 across 2019–2025, with 19.8% of July days above AQI 100. Ground-level ozone is the main driver.
- ✓6.9% of July days were Good (AQI 0–50), 73.3% Moderate (51–100).
- ✓43 days of 217 reached AQI 101+; the July peak was 156.
- ✓Best July: 2020; worst July: 2024.
Frequently asked questions
What is the air quality like in Dallas in July?▾
Across 2019–2025, the median daily AQI in Dallas in July was 68 (Moderate). 6.9% of days were Good, 73.3% Moderate, and 19.8% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is July a good time for outdoor exercise in Dallas?▾
A typical July day in Dallas is Moderate (median AQI 68): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 5 of July days (19.8%) 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 July air quality problems?▾
Ground-level ozone set the daily AQI on 50.2% of July days in Dallas. The highest July AQI recorded in 2019–2025 was 156 (Unhealthy), in 2024.
Dallas July air quality, year by year
Dallas July 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 | 66 | 7 | 143 | PM2.5 |
| 2020cleanest | 31 | 60 | 1 | 110 | PM2.5 |
| 2021 | 31 | 78 | 7 | 147 | O3 |
| 2022 | 31 | 77 | 8 | 150 | O3 |
| 2023 | 31 | 74 | 7 | 151 | O3 |
| 2024worst | 31 | 71 | 9 | 156 | PM2.5 |
| 2025 | 31 | 61 | 4 | 151 | PM2.5 |
What July air means in Dallas
A typical July day in Dallas is Moderate (median AQI 68): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 5 of July days (19.8%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
July's median AQI of 68 is above Dallas's whole-year median of 58, making it one of the area's dirtier periods. Nationally, the median July AQI across every EPA metro area (103,858 metro-days, 2019–2025) is 47, so Dallas runs above the national July norm; 19.8% of its July days topped AQI 100 versus 3.6% nationally (above average).
July is part of Dallas's summer season (June, July, August); the summer 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 55 (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.