Water resources data for the 1990 water year for California consist of records of stage, discharge, and water quality of streams; stage and contents in lakes and reservoirs; and water levels and water quality in wells Volume 3 contains discharge records for 181 gaging stations; stage and contents for 52 lakes and reservoirs; water quality for 36 stations; and 3 crest-stage partial-record stations. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in California.