The Air Quality Division uses atmospheric measurements, modeling, and research to continually monitor and assess Arizona's air quality.

Air Quality Modeling Air Quality Monitoring Links Border Research Programs Emergency Response Emissions Inventory Forecasting and High Pollution Advisories Hazardous Air Pollutants Monitoring and Assessing Air Quality Natural and Exceptional Events South Phoenix Pollution Reduction

The following links are for current monitoring data from Maricopa, Pima, and Pinal Counties:

• Maricopa County Interactive Pollution Data
• Pima County Monitoring Sites
• Pinal County

The following links are for historical data obtained through EPA's Air Quality System (AQS). Air quality data from monitors in Arizona as well as data throughout the United States are available through these sites.

• Air Data
• Air Explorer
• AQS Data Mart