Air Quality Division: Assessment

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The U.S. EPA: Air Quality System (AQS) contains ambient air pollution data collected by the U.S. EPA, state, local, and tribal air pollution control agencies from thousands of monitoring stations.

Air Quality Data Sources:

Smoke Management

The Air Quality Division monitors potential air quality impacts from smoke due to forest fires and issues permits to allow selected open burning activities.


Air Quality Modeling

Air quality models are used to determine the ambient concentrations of regulated pollutants attributable to various sources. They also are used to develop State Implementation Plans and to evaluate permitted industrial sources. In most cases, modeling is the only means of demonstrating whether a new source can meet ambient air quality standards or whether proposed control measures will bring a nonattainment area back into attainment.

ADEQ has expanded its air quality modeling capabilities to include the use of the Urban Airshed Model. This three-dimensional, photochemical air quality model is currently being used to develop the Phoenix area ozone nonattainment plan. ADEQ requires a high degree of modeling expertise and extensive data input. The Urban Airshed Model enables ADEQ to make more accurate predictions of pollutant concentrations. We hope to apply this model to future carbon monoxide and particulate nonattainment area plan modeling scenarios.

Air Quality Monitor Alamo Lake

Air Quality Monitoring

ADEQ conducts ambient air quality monitoring throughout Arizona. Environmental parameters measured in this monitoring network include criteria pollutants (O3, SO2, PM10, PM2.5, CO, and Pb), air toxics, and meteorology. ADEQ's Ambient Air Quality Monitoring Network Plan contains a detailed description of this network. Please visit ADEQ's Annual Reports for information on previous network plans.

Visibility and Monitoring Information

In addition to ADEQ's monitoring network, several county air quality agencies also conduct ambient air quality monitoring.

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