This book provides an overview of the Environmental Protection Agency's (EPA) National Water Program (NWP). Despite the ongoing effects of climate change, the National Water Program continues to achieve its mission to protect and restore our waters to ensure that drinking water is safe; and that aquatic ecosystems sustain fish, plants, and wildlife, as well as economic, recreational, and subsistence activities. Some of the programs and activities already underway throughout the NWP include protecting healthy watersheds and wetlands; managing stormwater with green infrastructure; and improving the efficiency and sustainability of water infrastructure, including promoting energy and water efficiency, reducing pollutants, and protecting drinking water and public health.