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  2. Combined Air Emissions Reporting

Resources for State, Local, and Tribal Authorities

Introduction

This page offers some resources to State, Local, and Tribal Authorities (SLTs) who are interested in CAERS.  Please note that further CAERS development is in hiatus while the new Unified Platform system is under development.  Please reach out to Julia Gamas (gamas.julia@epa.gov) if you are an SLT interested in learning about the UP, and/or are interested in providing feedback towards its development.

Current CAERS Users

  • Arizona Department of Environmental Quality (AZDEQ)
  • Department of Energy & Environment Government of the District of Columbia (DOEE)
  • Georgia Department of Natural Resources (GADNR)
  • Idaho Department of Environmental Quality (IDDEQ)
  • Maine Department of Environmental Protection (MEDEP)
  • Mississippi Department of Environmental Quality (MSDEQ)
  • Pima County (AZ) Department of Environmental Quality (PCDEQ)
  • Rhode Island Department of Environmental Management (RIDEM)

Additional Resources for SLT CAERS Users

  • CAERS API resources and documentation for automatic data retrieval from CAERS
  • Emissions Inventory System (EIS) Gateway for NEI reporting
  • Source Classification Codes (SCC) to search appropriate process codes
  • WebFIRE to search emission factors
  • Substance Registry Services (SRS) to search pollutants/chemicals

CAERS Code

CAERS code has been released in response to:

  • Open-Source Software and Code Repositories
  • Interim Open Source Software (OSS) Policy

CAERS code can be found in the USEPA GitHub

Please note that EPA cannot support inquiries about this code, nor receive modified code from SLTs to add to CAERS.

Combined Air Emissions Reporting

  • Combined Air Emissions Reporting (CAER) Home
  • CAERS
  • SLT Resources
  • CAER Project
    • CAER Short Term Wins
  • PDT Projects
Contact Us About Combined Air Emissions Reporting
Contact Us About Combined Air Emissions Reporting to ask a question, provide feedback, or report a problem.
Last updated on September 16, 2025
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