Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Air Emissions Inventories
  3. Report Data

Air Emissions Reporting Requirements (AERR)

Air Emissions Reporting Requirements (AERR)
Basic Information
Legal Authorities
  • 23 U.S.C. §101
  • 42 U.S.C. §7401 -7671q
Code of Federal Regulations Citations
  • 40 CFR Part 51 Subpart A
Docket Numbers
  • EPA-HQ-OAR-2004-0489

On this page:

  • Rule Summary
  • Rule History
  • Additional Resources

Rule Summary

On July 25, 2023, EPA announced proposed updates to the AERR to improve EPA's collection of certain emissions data critical for performing air quality and risk analyses, among other regulatory and non-regulatory activities. This proposed action would allow for EPA to annually collect (starting in 2027), hazardous air pollutant (HAP) emissions data for point sources in addition to continuing the criteria air pollutant and precursor (CAP) collection in place under the existing AERR. The proposed amendments would ensure that EPA has sufficient information to identify and solve air quality and exposure problems and ensure that communities have the data needed to understand significant environmental risks that may be impacting them.

Rule History

10/5/2023 - Extension of Proposal and ICR Comment Period

9/13/2023 - Reopening of the ICR Comment Period

7/24/2023 - Proposed Rule

2/6/2015 - Final Rule

6/6/2013 - Proposed Rule

12/17/2008 Final Rule

1/3/2006 - Proposed Rule

6/10/2002 Final Rule

5/23/2000 - Proposed Rule

Additional Resources

Fact Sheets (July 25, 2023)

  • Key Things to Know About the Proposed Updates to the AERR (pdf) (206.1 KB, July 25, 2023)
  • Overview Fact Sheet: Proposed Updates to the AERR (pdf) (220.95 KB, July 25, 2023)

Technical Documents

  • Regulatory Impact Analysis 
  • Technical Support Document (pdf) (881.04 KB, July 25, 2023)
  • Tables 1B, 1D, 2A-C of the Proposed Rule in Excel Format (xlsx) (40.79 KB, August 2023)

Webinar Slides & Select Recordings

  • AERR slides for Point Sources Webinar (pdf) (4.83 MB, August 18, 2023)
  • AERR slides for Industry Webinar (pdf) (5.14 MB, August 17, 2023)
  • Recording of the Industry Webinar
  • AERR slides for Fires, Mobile and Nonpoint Webinar (pdf) (3.62 MB, August 22, 2023)
  • AERR slides for Tribes and Small Businesses Webinar (pdf) (6.09 MB, August 24, 2023)
  • Recording of Tribes and Small Businesses Webinar
  • AERR Slides for Communities Webinar (pptx) (6.55 MB, 8/29/23)
  • Recording of Communities Webinar
  • AERR slides for SLT Q&A session (pdf) (2.56 MB, October 23, 2023)
  • AERR Slides for Industry Q&A session (pdf) (2.22 MB, October 25, 2023)

Frequently Asked Questions

  • AERR FAQ Part 1 (pdf) (323.63 KB, September 22, 2023)
  • AERR FAQ Part 2 (pdf) (242.04 KB, 11/9/2023)

Air Emissions Inventories

  • Get Data
    • 2020 NEI
      • 2020 NEI Technical Support Document (TSD)
      • 2020 NEI Online Retrieval Tool
      • 2020 Supporting Data and Summaries
      • 2020 Plan
      • 2020 NEI and Trends Report
    • All Emissions Data
    • Air Pollutants Emissions Trends Data
    • Air Emissions Modeling
  • Report Data
    • 2023 NEI Documentation
    • CAERS
      • CAERS Login
      • CAERS User Guide
    • EIS
      • Emissions Inventory System (EIS) Gateway
      • EIS User's Manual and How To's
      • Emissions Inventory System (EIS) Bridge Tools
    • Air Emissions Reporting Requirement (AERR)
  • Other Resources
    • Air Emissions Inventory Frequent Questions
    • Training
    • Emissions Inventory Guidance
    • Conference
      • 2023 International Emissions Inventory Conference
    • Methods and Science
  • Emissions Inventory Listservs
  • Points of Contact
Contact Us About Air Emissions Inventories
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 28, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.