Watershed planning is important for expanding cities in the developing world. Outlining proven approaches for a secure drinking water supply anywhere, this book focuses on the history, current conditions, and future of drinking water supplies for cities in the northeastern United States. Chapters examine how, when, and where it makes environmental, economic, and social sense to protect and manage upland forests to produce water as a downstream service. Using city watershed case studies, the text demonstrates that such stewardship is far more preferable than developing land and using engineering, technology, and artificial filtration as a solution to maintaining clean drinking water.