Water resources data for the 1990 water year for Hawaii and other Pacific Areas consist of records of stage, discharge, and water quality of streams and springs; and water levels and water quality in wells. This report, volume 1, contains dis-charge records for 83 gaging stations; water quality for 15 gaging stations, 20 partial-record flow stations, and 129 wells; and water levels for 45 observation wells. Also included are 107 crest-stage partial record stations, 27 miscellaneous partial-record-sites, and 6 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, Federal, and other agencies in Hawaii.