Water resources data for the 1999 water year for Alabama consist of records of stage, discharge, and water quality of streams; stages and contents of lakes and reservoirs; and water levels in wells. This report includes records on both surface and ground water in the State. Specifically, it contains: (1) discharge records for 125 streamflow-gaging stations, for 41 partial-record or miscellaneous streamflow stations; (2) stage and content records for 14 lakes and reservoirs and stage or elevation at 36 stations; (3) water-quality records for 25 streamflow-gaging stations, 2 lake stations, for 33 ungaged streamsites, and for 1 precipitation station; (4) water temperature and specific conductance at 14 surface-water stations; (5) dissolved oxygen at 9 stations; (6) sediment data at 38 stations; (7) chemical analyses of bed material at 25 stations; (8) water-level records at 3 recording observation wells; and (9) water-quality records for 56 ground-water stations. Also included are lists of active and discontinued continuous-record surface-water discharge stations, continuous-record surface-water stage stations, continuous-record surface-water-quality stations, and partial-record and miscellaneous surface-water-quality stations. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating Federal, State, and local agencies in Alabama.