Making the Utility Case for Onsite Non-potable Water Systems is a report that 1) defines the scope of onsite non-potable water systems, 2) highlights how utilities are using onsite non-potable water systems to meet One Water goals, 3) presents key considerations for implementing onsite non-potable water systems, and 4) outlines the role of utility leadership in implementing onsite non-potable water systems. The report also includes case studies from throughout the U.S. that illustrate the multiple benefits produced from onsite non-potable water systems, including system resilience, diversification of water supplies, stormwater management and pollution reduction, compliance with policy and regulatory requirements, reducing capital costs, enhancing environmental and community facilities, providing opportunities for public-private partnerships, and technology advancement.