AKM had prepared the City of San Clemente’s potable and recycled water master plans, with documentation dating back to 1994. In 2024, AKM updated and calibrated the hydraulic model for San Clemente’s Recycled Water Master Plan (RWMP). The project involved a comprehensive evaluation of the water system—covering 14.2 square miles with elevations ranging from sea level to 900 feet and encompassing 31 pressure zones—and addressed both demand and supply analyses as well as the development of a capital improvement program, including federal grant applications. Building on the 2017 hydraulic model, AKM integrated as-built data from previous system improvements, updated pump station specifications based on efficiency tests and certified pump curves and refined operational controls using SCADA data. To ensure model accuracy, rigorous calibration was conducted using SCADA and pressure logger data from a selected high-demand period. This process involved matching observed pressure, flow, and reservoir levels within a strict margin of error. Additionally, AKM developed diurnal demand patterns tailored to high water users and key zones, which enhanced the model’s representation of real-world conditions. These efforts enabled a thorough analysis of existing and projected future recycled water demands, evaluation of system expansion feasibility, and optimization of operations to effectively meet current and anticipated needs.