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Pima Association of Governments, the region's designated air quality planning organization, develops regional air quality plans, conducts analyses to ensure plans do not adversely affect air quality and ensures that air quality programs comply with all air quality requirements. PAG also conducts routine emissions inventories of greenhouse gases for the region.

Clean air is essential to the economic viability and well being of the Tucson region, and preservation of our desert ecosystem. Motor vehicle travel, industrial activities, land development patterns and meteorological conditions all affect regional air quality. Understanding the primary causes of air pollution and initiating steps to curb pollution are essential for maintaining healthy air.

National standards are established by the U.S. Environmental Protection Agency (EPA) to ensure that our air remains healthy and to protect the visibility of our natural areas. Currently, the region meets federal health standards. However, ground-level ozone, particulate matter and carbon monoxide continue to be monitored by Pima County to ensure the region meets the standards.

With the population of the Tucson region at 1 million, maintaining healthy air, understanding the sources of pollution and initiating steps to curb pollution are important.

Currently, air quality in the Tucson region is good and meets all of the federal environmental health standards. However, several air pollutants (ground-level ozone, particulate matter, carbon monoxide) are of key significance in our area. Of these three, ground-level ozone is of the greatest concern since increasing levels may exceed the total concentrations recommended by the federal health standard. Although air pollutants are emitted from commercial and industrial sources, the majority of manmade air pollution in the county comes from motor vehicle use.

For more information about each of the air pollutants, please click on the links below:

Air Quality Subcommittee

Air Quality Resources

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