• California Watershed Information Technical System (CERES)


• California Watershed Projects Inventory (CWPI) - A cooperative project to improve access to information on watershed protection projects and associated data in California.


• Center for Watershed Protection - Resources for watershed professionals. Includes access to Watershed Protection Techniques Online.


• Contra Costa County Watershed Forum


• EPA
  • Surf Your Watershed - A service to help you locate, use, and share environmental information on your watershed or community.
  
  
  • Watershed Assessment, Tracking & Environmental Results
  
  
• Global Rivers Environmental Education Network (GREEN)


• Klamath Resource Information System (KRIS) - Pulls together maps, data tables, charts, photographs and bibliographic resources into an easy-to-use, PC-based computer program.


• Los Angeles and San Gabriel Rivers Watershed Council


• USGS
  • "Science in Your Watershed" - The purpose of this site is to help you find scientific information organized on a watershed basis. This information, coupled with observations and measurements made by the watershed groups, provides a powerful foundation for characterizing, assessing, analyzing, and maintaining the status and health of a watershed.
  
  
  • National Wetlands Research Center - The National Wetlands Research Center is a source and clearinghouse of science information about wetlands in the United States and the world for fellow agencies, private entities, academia, and the public at large.


• Watershed Management Council


• Wetland International (WI)