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Maricopa County Air Quality Department
About Us

Mission Statement

The mission of the Air Quality Department is to provide clean air to Maricopa County residents and visitors so they can live, work and play in a healthy environment.


Powered by dedicated staff, guided by integrity and service, to provide clean air for our citizens.


We believe in working closely with our customers and citizens to provide clean air through innovation, collaboration and technology.

We believe in serving our external and internal customers through timely, open and honest communication.

We believe in a diverse workforce that is respected for its positive attitude, integrity and dedication to air quality.

We believe in being accountable as stewards of the public's resources and the environment.

We all share responsibility for the air we breathe.

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.

There are five divisions within the Air Quality Department including:

Air Monitoring measures ozone, particulate matter and carbon monoxide levels throughout Maricopa County

Air Quality Compliance and Enforcement performs site inspections, violation issuance and enforcement

Permit Engineering issues permits for major/minor sources

Planning and Analysis responsible for drafting and finalizing air quality air pollution rules and ordinances

Trip Reduction manages carpool programs

Maricopa County's Air Pollution Control Authority The department has statutory authority (ARS ยง49-402.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 department manages the Clean Air Make More outreach initiative to promote cleaner air and healthier lives. Please visit to Make the Commitment and learn more.