CHAD-Master is continuously maintained by EPA and is updated as new human activity data become available. CHAD-Master contains human activity data from 22 different studies performed 1982-2010. It is available for download in comma separated value (CSV) and SAS dataset formats.
Download CHAD-Master (CSV)(18 MB)
Download CHAD-Master (SAS)(22 MB)
This technical memo describes the contents of CHAD-Master.