These regulations constitute the legal basis for control of air pollution sources in Maricopa County, Arizona. They are adopted to implement the policy set forth in Title 49 of the Arizona Revised Statutes and to fulfill the State's responsibilities under the Federal Clean Air Act and its amendments to provide a legally enforceable State Implementation Plan for the attainment and maintenance of the National Ambient Air Quality Standards. This printing of the regulations incorporates changes adopted by the Maricopa County Board of Supervisors through January 2011.

The Research and Planning Services Division provides data retrieval and analysis for a variety of stakeholders, statistical reporting to a number of County and State entities, and survey design and implementation. Staff is also responsible for strategic planning and Managing for Results reporting and coordination. In the future, this Division will become involved in program evaluation, statistical analysis and research into best practices and trends.

The year 2002 marked the largest outbreak to date in the world as the virus rapidly spread across the U.S. Maricopa County has been spared the burden of widespread WNV-illness thus far, however the area is home to a viable mosquito population, many species of migratory birds and a large human populace with a propensity for outdoor activities making arrival of the virus inevitable and advanced preparations invaluable.

The Arizona Department of Transportation and the Maricopa Association of Governments are cooperating in the designation of a specific route for the CANAMEX Corridor in the Maricopa Region. Kimley-Horn and Associates, under contract to ADOT, provided technical assistance to ADOT and MAG in support of the high-level evaluation of route alternatives. The purpose of this study is to provide technical assistance, not to evaluate or select a preferred route alternative.

This version of the Major Streets and Routes Plan revises the original plan and the 2004 revisions. Looking ahead to pending updates to the classification systems of towns and cities in Maricopa County, the original MSRP stipulated a periodic review and modification of the street functional classification portion of the plan. This revision incorporates the following changes: (1) as anticipated, many of the communities in the County have updated either their general or transportation plans in the time since the adoption of the first MSRP; (2) a new roadway classification, the Arizona Parkway, has been added to the Maricopa County street classification system and the expressway classification has been removed; and (3) a series of regional framework studies have been conducted by the Maricopa Association of Governments to establish comprehensive roadway networks in parts of the West Valley.