Air Emissions Inventories

The National Emissions Inventory (NEI) is a detailed estimate of air emissions that include criteria pollutants and hazardous air pollutants. Learn more about the NEI
2014 National Emissions Inventory (NEI) Report is available. The interactive tool shows emission trends and summary analysis from the NEI 2014 version 2 at the national, state, and county level. Learn more about the 2014 NEI Report
The 2017 International Emissions Inventory Conference website with all of the training materials, presentations and posters that were presented during the conference is now available. Learn more about the Conference

Inventory News

Reports and Summaries

New Interactive 2014 NEI Report

Interactive 2014 NEI report and data exploration tool. Learn more.
Previous NEI Reports

2008 and 2011 NEI reports in PDFs. Learn more.
Air Pollutant Emissions Trends Data

Current emissions trends data and documentation of estimation methods. Learn more.

Current and recent NEIs

Comprehensive and detailed estimate of air emissions. Learn more.
Earlier NEIs

Previous versions of NEI summaries. Learn more.

Air Emissions Reporting Requirement (AERR)

Requires state and local agencies to collect and submit emissions data. Learn more.
EIS Gateway

Provides access to emissions inventory data. Learn more.
EIS User's Manual and How To's

Provides short instructions to assist users in submitting and retrieving various types of data from EIS. Learn more.
EIS Bridge Tools

Tools for developing submission files to EIS. Learn more.

Training

Procedures for loading data into the EIS. Learn more.
Conferences

Exchange of information from State, Local, Tribes and government agencies. Learn more.
Emissions Development Tools

Tools and resources used to develop inventories. Learn more.

Emissions Inventory Guidance

Provides the latest available guidance on developing emission inventories to meet State Implementation Plan (SIP) requirement. Learn more.