The National Sewage Sludge Survey (NSSS) consists of two tapes: the Analytical Assessment of Sewage Sludge at Final Disposal and the 1988 Sewage Sludge Use and Disposal Questionnaire Survey. The Analytical Assessment tape contains data from samples collected from secondary treatment Publicly Owned Treatment Works (POTWs) just prior to disposal. The samples of sludge were analyzed chemically to quantitate the concentration of organic pollutants, metals, dioxins, and pesticides. These were from a sampling frame of 11,346 POTWs in the contiguous United States. The Sewage Sludge Use and Disposal tape contains data collected on sewage sludge generation and disposal practices resulting from a national, stratified random probability sample of 479 secondary treatment POTWs. These facilities were drawn from a sampling frame of 11,407 POTWs. Questions addressed service area, POTW operating practices, sewage sludge generation, wastewater pretreatment, wastewater and sewage sludge testing, POTW financial information, and specific sewage sludge use and disposal practices. Four hundred sixty-two participating facilities provided responses.