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Toxic Release Inventory data for the US. Sources and amounts of toxic chemicals released to air and water. Also has information on health effects and other topics.
Home page for water resources information from the U.S. Geological Survey. Topics include ground water, surface water, water use, water quality, acid rain, toxic substances hydrology.
Conducts research on the hydrologic cycle, particularly runoff generation processes in diverse watersheds. Includes publications and presentations, information about opportunities for students, and related links.
Comprehensive database of the Netherlands water community. Includes information on organisations with their geographic/technical areas of expertise, water projects, and international water events. Describes water issues and projects in all parts of the world.
Describes what a watershed is, how a water cycle works, and shows how the last glacier shaped the western Pennsylvania/southwest New York region. Focus is on how water workes within natural systems, and how human activities can impact water quality.
Focuses on international water issues such as working to alleviate poverty and hunger, sustainable development, environmental integrity, and human health.