This compendium was developed through a synthesis of cases of best practices for water management in the G20 countries. For this purpose, the Ministry of Jal Shakti, Government of India developed a best practice template and shared with the G20 member countries to report programmes and interventions undertaken by them, across but not limited to the following thematic areas: universalisation of water and sanitation services; participatory groundwater management; climate resilient water infrastructure; water use efficiency improvement; and any other water management programmes or interventions that have led to improved water governance, better data and information, models for financing water infrastructure, and capacity building of stakeholders.