In an era of dwindling resources, water is poised to become the new oil as the entire world now faces a decreasing supply of clean water. To avert a devastating shortage, we must look at alternate water sources for existing structures and plan our new developments differently. This book focuses on rainwater harvesting in the urban environment. It outlines the process of water collection from multiple sources - landscape, residential, commercial, industrial, school, park and municipal systems; provides numerous case studies; details the assembly and application of equipment; includes specific details, schematics and references. All aspects of rainwater harvesting are outlined, including passive and active system set-up, storage, stormwater reuse, distribution, purification, analysis and filtration. There is even a section on rainwater harvesting for wildlife. Also discussed are cooling tower bleed-off water, air conditioning condensate, gray water, and fog collection.