Numerous agencies, companies, individuals, and organizations have collected the ambient air quality monitoring data presented in this report. The Arizona Department of Environmental Quality publishes data from these various sources to provide a picture, which is as complete as possible, of air quality conditions throughout Arizona.

An introduction to the impact of conservation alternatives on air quality which will be integrated into the land use and conservation plans. The air quality study is summarized in this memorandum.

The study generally confirms the trends and impacts identified in the February 2001 study "Air Quality in Pima County," and suggests two types of strategies for maintaining air quality and ensuring compliance with federal air quality standards. Potential funding sources and future legislative considerations are briefly discussed.