AQI 58 · Ozone · Trend: Stable
| Average AQI | 58 |
| Good Days / Year | 188 |
| Unhealthy Days / Year | 18 |
| Primary Pollutant | Ozone |
| PM2.5 Average | 9.8 µg/m³ |
| Trend | → Stable |
| Monitoring Stations | 120 |
| Nonattainment Areas | 2 |
Texas has the most complex air quality picture of any state. Houston's petrochemical industry and DFW's vehicle sprawl create the two largest ozone nonattainment areas. Meanwhile, Austin and San Antonio maintain relatively good air quality. The Permian Basin oil boom has introduced new emission sources.
TCEQ (Texas Commission on Environmental Quality) manages air quality. Vehicle emissions testing in metro areas. Oil/gas well emission permits. Historically industry-friendly regulatory approach.
Houston-Galveston — ozone nonattainment. Dallas-Fort Worth — ozone nonattainment. Two of the largest nonattainment areas in the nation.