The Office of the Auditor General has conducted a sunset review of the Department of Environmental Quality using the criteria in Arizona’s sunset law. This report includes responses to the sunset factors and is the final in a series of three reports on the Department. The first report focused on the Department’s processes for monitoring and enforcing regulated facilities’ compliance with state and federal environmental laws and regulations. The second report examined the Department’s processes for ensuring that owners and operators of petroleum underground storage tanks comply with state and federal laws and regulations regarding financial responsibility for leaks and spills.