The National Air Toxics Information Clearinghouse has been established by the EPA Office of Air Quality Planning and Standards for the purpose of facilitating information transfer among Federal, State, and local air quality management agencies. The document has been published as part of that effort. The purpose is to provide State and local agencies and other Clearinghouse users with citations to reports and Federal Register notices useful in developing and operating air toxics control programs. The reports selected for the bibliography were published by the following agencies: U.S. Environmental Protection Agency, National Academy of Sciences, National Cancer Institute, National Institute of Environmental Health Sciences, National Toxicology Program, National Institute for Occupational Safety and Health, and World Health Organization. Reports published by various State and local agencies are also included. Volume 2 consists of an index to the reports by document type; pollutant by class, name, or Chemical Abstracts Service (CAS) number; source category by Standard Industrial Classification (SIC) code; and sponsoring agency.