Air Quality

The Maricopa County Air Quality Department is a regulatory agency whose goal is to ensure federal clean air standards are achieved and maintained for the residents and visitors of Maricopa County. The Maricopa County Air Quality Department is governed by the Maricopa County Board of Supervisors and follows air quality standards set forth by the federal Clean Air Act.

The department has statutory authority (ARS §49-402.B) for air quality programs and receives direct delegation/authority from the Environmental Protection Agency for certain air quality programs. In addition, the department has responsibility through a formal agreement with ADEQ and MAG for emission inventories, air quality monitoring data and its Trip Reduction Program.

The Maricopa County Air Quality Department's Planning & Analysis Division is responsible for drafting and finalizing air pollution control rules and ordinances and for compiling emissions inventories. Rules and ordinances are created and revised to comply with the Clean Air Act and to implement control strategies for stationary sources in Maricopa County. Emissions inventories are a comprehensive listing, by source, of air pollutant emissions. Emissions inventories cover point sources (large industries), area sources (numerous small sources such as gas stations and consumer products usage), mobile sources (both on-road and off-road) and biogenic sources (gases released by plants and soil).

The division also works with the Maricopa Association of Governments, the Arizona Department of Environmental Quality and the Arizona Department of Transportation to develop State Implementation Plans (SIP), policies/guidelines and reports required to complete SIP analyses. A SIP is a cumulative record of all air pollution control strategies, state statutes, state and local rules and local ordinances implemented by governmental agencies within Arizona.