This project involves the Environmental and Social Impact Assessment (ESIA) for sewage treatment plants (STPs) in Madinah, Tabuk, and Buraidah, including emergency outfalls, treated water transport systems, tanks, and pumping stations. The study includes environmental sampling, air quality modeling, soil and groundwater testing, ecological assessments, and social impact surveys. It also covers hydrological studies and the preparation of comprehensive ESIA and EIA reports in compliance with the standards of the National Center for Environmental Compliance (NCEC), the International Finance Corporation (IFC) Performance Standards, and the Equator Principles. The project aims to ensure environmental permitting and support sustainable reuse of treated water, while providing recommendations to help the client meet international environmental and social compliance requirements.