Executive Summary: Key Arizona Medical Waste Rules Primary Regulator:  Arizona Department of Environmental Quality (ADEQ). Storage Limit:  Maximum 90 days (7 days if not refrigerated and causing a nuisance). Refrigeration:  Required if stored for more than 7 days (must be $\le$ 40°F). Manifests:  Mandatory tracking documents; must be kept for 3 years. Managing medical waste is a critical responsibility for healthcare providers, laboratories, and specialized clinics across th