Arizona Department of Environmental Quality ADEQ | 18,702 followers on LinkedIn. Protecting and Enhancing public health and the environment of Arizona. | ☁️💧♻️ Clean Air, Safe Water, Healthy Land for Everyone in #AZ. Learn about our work ➡️ azdeq.gov The Arizona Department of Environmental Quality's mission is to protect and enhance public health and the environment in Arizona. Established by the Arizona Legislature in 1986 in response to growing concerns about groundwater quality, ADEQ today administers a variety of programs to improve the health and welfare of our citizens and ensure the quality of Arizona's air, land and water resources meets healthful, regulatory standards.