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Technology Transfer Network Clearinghouse for Inventories & Emissions Factors

Welcome to WebFIRE

WebFIRE is the EPA's online database that contains emissions factors for criteria and hazardous air pollutants (HAP) for industrial and non-industrial processes and multiple reports submitted to the EPA using the Compliance and Emissions Data Reporting Interface (CEDRI) in response to regulatory requirements under Parts 60 and 63 of Title 40 of the U.S. Code of Federal Regulations (CFR). WebFIRE also allows you to register to receive periodic email notifications when reports are submitted to WebFIRE and to prepare batch downloads of WebFIRE emissions and facility information.

Emission Factor Functions

WebFIRE contains emissions factors developed by the EPA for criteria pollutants and HAP for industrial and non-industrial processes. For each EPA emissions factor, WebFIRE contains descriptive information such as industry and source category type, control device information, the pollutants emitted, and supporting documentation (e.g., test reports).

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Search and Retrieve EPA Emissions Factors

You can search WebFIRE for EPA emissions factors using either a Simple or Detailed Search. Using the Simple Search, you can retrieve EPA emissions factor records by entering one or more simple terms such as: source category name (e.g., wood combustion), process description (e.g., spreader stoker), EPA's Source Classification Code (SCC), or any other viable search term likely to be found in an emissions factor record. Using the Detailed Search, you can focus the factor retrieval process by entering one or more of the following search criteria:

  • SCC (complete code or individual SCC level descriptions)
  • Control device type
  • Pollutant or pollutant group type
  • Specific AP 42 section

Search for emissions factors

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Develop User-Defined Emissions Factors

[This function is under development and is not available at this time.]

You can develop an emissions factor from individual performance test values that you select from the WebFIRE database using the same procedures that the EPA follows to develop new or revise existing emissions factors. Because user-defined emissions factors are not retained in the WebFIRE database after they are created, WebFIRE allows you to prepare and download a report showing the details of an emissions factor that you develop.

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Report Functions

You can search WebFIRE for reports submitted in response to regulatory requirements under 40 CFR Parts 60 and 63. The links below describe the types of reports contained in WebFIRE:

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Search and Retrieve WebFIRE Report Submissions

You can search for and retrieve reports that have been submitted to WebFIRE using the following criteria:

Search for reports

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Register for Email Notifications of Report Submissions

You can register for and receive periodic email notifications when reports of interest to you are submitted to WebFIRE.

Register for email notifications

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Download WebFIRE Data in Bulk

You can download all or portions of the emissions factor data and reports contained in WebFIRE in bulk.

Download WebFIRE data in bulk

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Office of Air Quality Planning & Standards | Technology Transfer Network
Clearinghouse for Inventories & Emissions Factors | WebFIRE

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