Subject Environmental Data Registry (EDR) is a comprehensive, authoritative source of reference information about environmental data Click to Open URL http://www.epa.gov/edr/index.htm Host URL for this Link http://www.epa.gov Site Information The Environmental Data Registry (EDR) is a comprehensive, authoritative source of reference information about environmental data. It is not the environmental data itself, but rather the information that helps describe the data and make it more meaningful. It provides information on the definition, origin, source, and location of environmental data. When used in conjunction with an environmental information database, the EDR enables users to better understand the information they are accessing. Categories Hazardous Materials Sub-Category Government Resources Type Link Extension External Web Page Switch View to Show ALL Sub-Categories at once Switch View to Show Sub-Categories One at a time