EPA Methods Index EPA's Region 1 Library staff developed this methods index as a tool to help users locate copies of Agency-published methods. The index includes only EPA methods and its primary goal is as a reference tool to identify a source from which the actual method can be obtained, either free or for a fee.
National Environmental Methods Index The National Environmental Methods Index (NEMI) is a computer searchable database of environmental measurement methods. It is designed to serve as an index to measurement methods that may be available from all sources (government agencies, private sector, academia). It is a project of the Methods and Data Comparability Board.