Access to Safe and Reliable Drinking Water Is a Fundamental Human Right and a Cornerstone Of Sustainable Development. This Review Paper Critically Examines the Development of Reliable Drinking Water Sources and the Augmentation of Existing Sources to Ensure the Long-Term Sustainability of Water Supply Systems. With a Growing Global Population and Increasing Environmental Pressures, the Demand For Clean and Dependable Water Resources Has Never Been More Pressing. This Comprehensive Review Assesses the Various Strategies, Technologies, and Approaches Employed Worldwide to Address This Vital Challenge. We Delve into the Innovative Solutions, Such As Groundwater Recharge, Desalination, Water Recycling, and Watershed Management, Which Are Pivotal In Enhancing the Resilience of Water Supply Systems. Additionally, We Explore the Socio-Economic and Environmental Implications of These Strategies, Emphasizing the Importance of Community Engagement, Equity, and Ecological Preservation. By Synthesizing the Latest Research Findings and Case Studies, This Review Aims to Provide Valuable Insights and Guidance For Policymakers, Water Resource Managers, and Researchers, With the Ultimate Goal of Securing a Sustainable and Equitable Water Future For All.