Volume 2 of water resources data for the 1980 water year for California consists of records of stage, discharge, and water quality of streams and wells; stage, contents, and water quality in lakes and reservoirs; and water levels in wells. This report contains discharge records for 159 gaging stations; stage and contents for 19 lakes and reservoirs; water quality for 116 stations and 32 wells; water levels for 85 observation wells. Also included are 4 crest-stage partial-record stations and 3 low-flow 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.