Water resources data for the 1979 water year for New Mexico consist of records of discharge and water quality of streams; stage", contents and water quality of lakes and reservoirs; and water levels and water quality in wells and springs. This report contains discharge records for 229 gaging stations; stage and contents for 24 lakes and reservoirs; water quality for 97 gaging stations, 13 partial-record stations, 2 reservoir, 18 springs and 143 wells; and water levels for 86 observation wells. Also included are 126 crest-stage partial-record stations and 2 low-flow partial-record stations. Additional water data were collected at various sites, not part of the systematic data collection program, and are published as miscellaneous measurements. 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 New Mexico.