This document discusses institutions related to access to water, particularly for poor people. It examines how institutions at different levels interact to facilitate or inhibit water access. Key questions addressed include who controls water resources, the incentives for providing poor access, how institutions adapt to hydrology, and how droughts and floods are managed. The document provides examples of different types of water institutions like state, collective, and market-based and how they vary in scale and complexity. It emphasizes the need to understand existing water rights and power structures to reform institutions to better support water access for the poor.