About


Air Quality in Pima County

Pima Association of Governments is the designated air quality planning agency for the region and works with the Environmental Protection Agency (EPA), state and Pima County environmental agencies to develop regional air quality plans. PAG staff conducts modeling and analyses to insure that plans do not adversely affect air quality and that the regional will remain in compliance with the EPA’s air pollutant health standards.

 Ambient air monitoring has been conducted by the Pima County Department of Environmental Quality (PDEQ) and its predecessors since the 1960's. Over time, various air pollution monitoring and research programs have been established and revised to meet changing federal regulations and local needs.

Motor vehicle travel, industrial activities, land development patterns and meteorological conditions all affect air quality in the Tucson region. With the region's population at 1 million, maintaining healthy air and understanding the primary causes of air pollution are of great importance. Currently, the Tucson region meets all federal air quality standards. However, three pollutants are of continuing concern: ground-level ozone, particulate matter and carbon monoxide.

Air Quality Resources:

For more information about individual air pollutants and current local trends visit:  PAG's Air Quality Planning Site
Information about the PDEQ monitoring program visit:  Pima County Department of Environmental Quality Air Monitoring
Real time local air quality information visit:  Current Pima County Air Quality Information
Information on how we can keep our air healthy:  PAG Air Quality Program
To see other resources for Air Quality:  External Air Quality Resources
For more information on the Ajo and Rillito nonattainment area status see:  ADEQ State Implementation Plan (SIP) Capsules
For more information on the CO Limited Maintenance Area and Plan, see: PAG's Air Program


To view a map showing the various air quality monitoring sites and areas, click the Map button on the upper right of the page or Click here