Water-resources data for the 1998 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 2 contains discharge records for 113 gaging stations, gage height records for 5 stations, stage and contents for 6lakes and reservoirs, and water quality for 17 stations. Also included are data for 1 low-flow partial-record station and 2 miscellaneous measurement 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.