AQI 65 · PM10 · Trend: Stable
| Average AQI | 65 |
| Good Days / Year | 168 |
| Unhealthy Days / Year | 28 |
| Primary Pollutant | PM10 |
| PM2.5 Average | 10.5 µg/m³ |
| Trend | → Stable |
| Monitoring Stations | 52 |
| Nonattainment Areas | 3 |
Arizona faces unique air quality challenges from desert dust, extreme heat-driven ozone, and rapid urban growth. Phoenix is one of America's dustiest large cities, while mountain areas like Flagstaff enjoy generally clean air.
ADEQ (Arizona Dept. of Environmental Quality) enforces both state and federal standards. Maricopa County has strict dust control ordinances for construction sites. Vehicle emissions testing required in metro Phoenix and Tucson.
Maricopa County (Phoenix metro) — PM10 and ozone nonattainment. Pinal County — PM10. Yuma — PM10. Multiple areas struggle with desert dust standards.