The report is the last of three supplements updating the October-December 1980 report (EPA-600/7-81-012a and -012b) and should be used in conjunction with it. The report, generated by a computerized data base system, surveys operational and planned domestic utility flue gas desulfurization (FGD) systems. It summarizes information contributed by the utility industry, process suppliers, regulatory agencies, and consulting engineering firms. It alphabetically tabulates domestic FGD systems by development status (operational, under construction, or in planning stages), utility company, process supplier, process, and waste disposal practice. It gives data on boiler design, fuel characteristics, FGD system design, and actual performance. It includes unit by unit dependability parameters and discusses problems and solutions associated with the boilers and FGD systems. Process flow diagrams and FGD systems economic data are appended.