Water resources data for the 1983 water year for southwest Florida consist of records of water levels and water quality of wells. Records of stage, discharge, and water quality of streams; elevation and water quality of lakes and reservoirs; and discharge and water quality of springs are in Volume 3A. 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. Geologic Survey and cooperating state and federal agencies in Florida.