California Department of Water Resources
http://www.water.ca.gov/

Association of California Water Agencies
http://www.acwanet.com/

Regional Water Quality Control Board
http://www.waterboards.ca.gov/centralvalley/

Water Education Foundation
http://www.watereducation.org/

USBR Central Valley Operations
http://www.usbr.gov/mp/cvo/

State Water Resources Control Board
http://www.swrcb.ca.gov/