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Contact Us

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

  • 2017 National Emissions Inventory (NEI) Report is available.  The interactive tool shows emission trends and summary analysis from the NEI 2017 version 1 at the national, state, and county level.  Learn more about the 2017 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

Announcements

Inventory News

  • 2017 NEI January release posted (2/2021)
Reports and Summaries
  • New Interactive 2017 NEI Report

    Interactive 2017 NEI report and data exploration tool.

  • Previous NEI Reports

    Interactive 2014 NEI report and data exploration tool.

    2008 and 2011 NEI reports in PDFs.

  • Air Pollutant Emissions Trends Data

    Current emissions trends data and documentation of estimation methods.

Data and Documentation
  • Current and recent NEIs

    Comprehensive and detailed estimate of air emissions.

  • Earlier NEIs

    Previous versions of NEI summaries.

Data Submission Program
  • Air Emissions Reporting Requirement (AERR)

    Requires state and local agencies to collect and submit emissions data.

  • EIS Gateway

    Provides access to emissions inventory data.

  • EIS User How To's

    Provides instructions to assist users in submitting and retrieving various types of data from EIS.

  • EIS Bridge Tools

    Tools for developing submission files to EIS.

Resources
  • Training

    Procedures for loading data into the EIS.

  • Conferences

    Exchange of information from State, Local, Tribes and government agencies.

  • Emissions Development Tools

    Tools and resources used to develop inventories.

Guidance
  • Emissions Inventory Guidance

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

See also Clearinghouse for Inventories and Emissions Factors (CHIEF)

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Last updated on July 14, 2021