Water resources data for the 1984 water year for California consists 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 126 gaging stations; stage and contents for 36 lakes and reservoirs; gage height records for two lakes; water quality for 9 streams and 40 wells; water levels for 53 observation wells. Also included are 2 crest-stage partial-record stations and 27 water-quality 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.