The National Groundwater Association's stated purpose is to provide guidance to members, government representatives, and the public for sound development, protection, and management of the world's ground water resources. The Web site contains everything needed to stay current, including a daily updated news service, a publications link, events calendar, certification information, buyers guides,...

This U.S. Environmental Protection Agency (EPA) website allows users to locate, use and share environmental information about their state and watershed. Using the interactive map, users can locate their watershed and discover geologic, chemical, and geographical information. Visitors can learn how to adopt a watershed and locate citizen-based groups. The Watershed Atlas provides data and...