The report is the first full compilation (not a supplement) since the October-December 1980 report (PB81-187783). Because the next three reports are to be supplements, this issue should be retained for reference throughout the year. The report, generated by a computerized data base system, presents a survey of operational domestic utility flue gas desulfurization (FGD) systems. It summarizes information contributed by the utility industry, process suppliers, regulatory agencies, and consulting engineering firms. Domestic FGD systems are tabulated alphabetically by utility company. It presents data on boiler design, FGD system design, fuel characteristics, and actual performance. It includes unit by unit dependability parameters and discusses problems and solutions associated with the boilers of the FGD systems. Process flow diagrams and definitions are appended. Because of its length, Section 3 of the report is published as a separate volume; the remainder of the report is in Volume I. The report Front Matter and Appendices B, C, and D are repeated in Volume II to assist the reader.