The Hudson River Environmental Society (HRES) was founded in 1970 to foster research on the Hudson River environment and related coastal areas, provide a forum for communication and cooperation among researchers, and make the results of environmental research available and accessible to concerned citizens and public officials. The Hudson River Environmental Society Library contains approximately 12 linear feet of records and 1,226 monographs. The records consist of field notes, meetings minutes, research papers, memorandum, and newspaper and article clippings. The monographs consist of scientific reports generated by government agencies and private organizations concerned with the environmental condition of the Hudson River.