Regional Air Quality Modeling Analyses

Regional Air Image

In accordance with the Clean Air Act, modeling analyses must be performed to demonstrate attainment and maintenance of the federal air quality standards and to evaluate the effectiveness of control measures. Regional air quality modeling work is conducted by MAG for carbon monoxide, ozone, and particulate matter.

The modeling process involves a broad range of technical processes, including development of emissions inventories, validation of modeling procedures, and simulation of future air quality conditions. Air quality modeling analyses must also be performed to determine the conformity of transportation plans, programs, and projects. Conformity analyses have been performed since the requirements of the 1990 Clean Air Act Amendments took effect.

It is necessary to maintain, update, and enhance the air quality models for the determination of conformity and for the preparation of the regional air quality plans. Effectively maintained, updated, and enhanced models produce essential data regarding the pollution problems in the Maricopa County area and facilitate effective regional air quality planning.

The MAG air quality modeling staff downloads and installs, runs, and validates emissions, meteorology, and air quality models developed by the U.S. Environmental Protection Agency (EPA), Federal Aviation Administration (FAA), National Center for Atmospheric Research (NCAR) for MAG air quality and emission modeling analyses.

Air Quality Modeling Program

Air Quality Nonattainment and Maintenance Areas for Maricopa and Western Pinal Counties

Ozone Modeling Domains WRF and CAMx Nested Ozone Modeling Domains for Photochemical Air Quality Modeling Analyses

MAG Air Quality Modeling System Flowchart MAG Air Quality Modeling System Flowchart

Ozone Plume Ozone Plume Transport from Southern California and Mexico to the Northeast Region of the U.S. through Arizona in May 31, 2011