The purpose of the Environmental Quality division is to protect the health of the public and the environment and promote effective onsite wastewater treatment. Authority for the wastewater program is delegated by the Arizona Department of Environmental Quality to Coconino County's Environmental Quality program.
Authority for the wastewater program is delegated by the Arizona Department of Environmental Quality (ADEQ) to Coconino County Community Development, Environmental Quality division (CCCDEQ). Coconino County has delegation for all conventional (septic systems) and some alternative onsite wastewater systems up to a capacity of 24,000 gallons per day (gpd). Larger systems such as Flagstaff, Williams, Page, Kachina Village, and Pinewood are regulated by ADEQ.