National Emissions Inventories

EPA is currently developing a National Emissions Inventory for the year 2017. The OGEC Repository provides links to EPA documentation for the 2017 NEI and access to EPA's 2017 Nonpoint Oil & Gas Estimation Tool. The final version of the 2014 NEI (2014 NEI v2) was released in February 2018. This page contains links to resources for EPA's 2014 NEI data, including documentation and tools to browse and display the inventory data, as well as links to the 2016 Inventory Collaborative, which is developing a 2016 based emissions platform derived from the 2014 NEI for use in air quality planning.
2017 NEI Development
2016 Inventory Collaborative
2014 NEIv2: Documentation, Data, and Display
2014 NEI Case Studies