AKM performed a study that analyzed the exchanging water between El Toro Water District (ETWD) and Moulton Niguel Water District (MNWD) systems. ETWD experiences storage limitations at its recycled water reclamation plant, leading to the need for potable water supplementation during high-demand periods and secondary effluent discharge when demand is low. To address these challenges, AKM’s study focused on identifying feasible interconnection alignments, assessing hydraulic impacts, and optimizing system operations to benefit both agencies. AKM utilized MNWD’s hydraulic model to simulate various interconnection scenarios by adjusting system controls, including pump station on/off levels, pressure relief valves, and altitude valve settings, to accommodate the additional flows. Two primary interconnection pipeline alignments were considered and AKM’s hydraulic analysis revealed which provided the most operational benefits—reducing the need for potable water supplementation in MNWD’s reservoirs, while efficiently utilizing ETWD’s surplus recycled water. The study found that the connection at Sheep Hills Reservoir effectively balanced system flows, preventing reservoir depletion and reducing reliance on potable water pumping during peak hours. AKM recommended the most reliable and cost-effective solution based on study findings, to integrate ETWD’s excess recycled water into MNWD’s system. The study provided detailed pipeline alignment recommendations, necessary facility modifications, and a long-term operational strategy to maximize efficiency. AKM’s analysis confirmed that the interconnection would enhance regional water reuse, improve reservoir storage management, and minimize reliance on potable water supplementation, ensuring a sustainable and resilient water infrastructure for both districts.