The primary purpose of this technical support document is to explain the sources of information included in the inventory. This includes showing which sources of data are used for each sector, and then providing more information about the EPA-created components of the data.
The Appendices shows the percentage of emissions from different data sources in 2008 NEI by pollutant and EIS sector. The data sources are grouped from the full suite of datasets used to compile the 2008 NEI.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.