Water has had an immeasurable impact on the history and growth of the United States. As an essential element of life water has been and remains a constant source of conflict and controversy as different constituencies fight for limited resources. The Encyclopedia of Water Politics and Policy in the United States is the most comprehensive reference source available that analyzes water-related issues in America. A diverse group of more than 100 scholars have provided their research and analysis of why water is so significant by tracing its impact on issues like national and state boundaries, western migration, urbanization, and the economy. This volume chronicles the origins of present-day water problems, political conflicts, the impact of legislation and court decisions on the use of water resources, the major projects undertaken across the country, and what experts are proposing be done to preserve this basic component of the environment. Going back some 150 years, the Encyclopedia provides an overview of approximately 280 pieces of water-related legislation, legal cases, people, projects, and organizations that have shaped the history of the United States. In addition to historical coverage, the volume also addresses many current environmental issues including acid rain, agriculture, climate change, mining, erosion, levees and dams, pollution, urbanization, and wastewater treatment.