ADEQ, which stands for the Arizona Department of Environmental Quality, is the state's cabinet-level environmental agency. Established in 1987 under the Environmental Quality Act of 1986, ADEQ is responsible for administering the state's environmental laws and delegated federal programs to prevent pollution and ensure cleanup in air, water, and land. Composed of three environmental programs – Air Quality, Water Quality, and Waste – ADEQ carries out various core functions including planning, permitting, compliance management, monitoring, assessment, cleanups, and outreach.

Their mission is to protect and enhance public health and the environment in Arizona through consistent, science-based regulation and clear communication. ADEQ's vision is to perform their vital mission with excellence and improve every day, aiming for the highest standards of effectiveness and efficiency. They utilize the Arizona Management System (AMS) and have achieved impressive results in their transformation efforts.

For more information, the ADEQ Main Office is located in Phoenix, with a Southern Regional Office in Tucson. ADEQ can be contacted through their general information and toll-free numbers, as well as via their website