- Colorado State University Water Resources Archive Colorado State University Water Resources Archive "a joint effort of the University Libraries and the Colorado Water Resources Research Institute
- Homepage Colorado Water Knowledge Colorado Water Knowledge, a compilation of water knowledge maintained by Colorado State University.
- Homepage Water Information Program The Water Information Program is an information and issues website maintained by the Southwestern Water Conservation District (SWCD) and associated agencies in southwestern Colorado.
- Homepage Colorado's Water: Headwaters of the West Colorado's Water a website sponsored by water providers in the Denver-Aurora Metropolitan Area and the Northern Colorado Water Conservancy District. It is hosted by KMGH, a Denver television station. It will require Macromedia Flash Player.
- Homepage Colorado Foundation for Water Education A non-profit organization dedicated to promoting a better understanding of Colorado's water resources and issues by "providing balanced and accurate information and education on water resource topics." The Colorado Foundation for Water Education publishes Headwaters Magazine.
- Directory of Colorado Water Quality Data (PDF file)
- Ground Water Atlas of the United States Ground Water Atlas of the United States.
- Western States Water Laws BLM site with a summary of Western states water laws.
- U.S. Interstate Freshwater Compacts Database
- Bibliography on Water Resources and International Law Peace Palace Library
- WORLD WATER RESOURCES AND THEIR USE a joint SHI/UNESCO product (SHI = State Hydrological Institute St. Petersburg, Russia)
- Eco-Hydrological Databases
- Transboundary Freshwater Dispute Database Transboundary Freshwater Dispute Database
- Transboundary Freshwater Spatial Database
- Water Conflict and Cooperation Bibliography
- International Freshwater Treaties Database
- International Water Events Database: 1948-1999
- International Waters Learning Exchange and Resource Network International Waters Learning Exchange and Resource Network
- The Water Page (with an emphasis on African issues)
- Water Encyclopedia: Science and Issues
- Water Stories
- photographic, animation and video material relating to hydraulics, hydrology and water resources IAHR Media Library
- Water on the Web