- Arizona Water Resources Research Center
- Dictionary of Water Words
- Ground Water Science
- National Drinking Water Clearinghouse
- National Institute for Water Resources (NIWR)
- USGS - detailed water use data
- Water and Waste International Resources
- Water Efficiency Clearinghouse
- Waterlink
- Water Librarian's Home Page
- Water Online
- Water Quality Information Center
- Water Resources Data from USGS
- Water Resources Center Archives from UC Berkeley
- Water Strategist Community