Project PEPE-NEROS was a major EPA-sponsored field measurements program conducted during the summer of 1980 out of Columbus, Ohio. The dual objectives were to create data bases for (a) the study of the evolution and composition of regional haze episodes occurring in northeastern U.S., particularly during summer months, and (b) the study of oxidant formation and transport in urban plumes and on regional scale. Many research groups representing EPA, NASA and other government agencies, as well as industry and universities participated in the field study. The overall data base of PEPE-NEROS was centralized and standardized at Washington University. The two-part report describes and documents the data base and its availability. Part I overviews the measurements and the data base, and lists the many reports which contain details of the measurement platforms and their missions. Part II gives documentation of the final General Distribution Data Base of PEPE-NEROS which is contained on two magnetic tapes.