The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980 PL 96-510 (commonly known as Superfund) mandates in Section 103(c) that certain persons notify the U.S. Environmental Protection Agency (EPA) by June 9, 1981, of the existence of sites where hazardous substances from industries, businesses, governments, hospitals, and other sources are stored, treated, or disposed of. This magnetic tape contains records of 8664 notifications of hazardous substance sites that were reported as of the notification deadline date, (June 9, 1981). For each notification the tape summarizes the location, person required to notify, amount and type of any hazardous substance to be found, and any known or suspected releases of hazardous substances on the site reported. The notifications were compiled to help EPA and State and local governments remedy problems created by uncontrolled hazardous substance disposal. The tape is sequenced alphabetically by state and site name within each state, respectively.