Water-resources data for the 1978 water year for California consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; records of water levels in selected observation wells; and selected chemical analyses of ground water. Records for a few pertinent streamflow and water-quality stations in bordering States are
also included. These data, a contribution to the National water Data System, were collected by the Geological Survey and cooperating local, State, and Federal agencies in California.