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Where can I find older NEI data (prior to 2008)?
The raw data and summaries that are still available (dating back to 1990) can be obtained from the web page https://www.epa.gov/air-emissions-inventories/pollutant-emissions-summary-files-earlier-neis . Starting with 2001 data, a more limited selection of summary files are available.
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Was Jatropha analyzed for this final rule and, if so, what D-code applies?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The GHG emissions performance of a Jatropha-based pathway was not analyzed for the final rule because sufficient information was not available. Since EPA has not yet assigned a D code for this pathway, a producer cannot generate RINs…
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Under what conditions might a renewable fuel produced under an approved pathway in the RFS regulations qualify for use in Navy applications?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Background: The U.S. Navy is seeking to blend biofuels with fossil-based fuels, such as F-76 fuel, which are often used in Navy marine vessels. The Navy asked EPA for guidance on whether such biofuels would be treated as…
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Can I get access to the Emissions Inventory System if I am not a data provider to EPA?
The Emission Inventory System (EIS) is a secured database for EPA and State/Local and Tribal Air Agencies only. The EIS is used to develop the National Emission Inventory (NEI). While you cannot have access to EIS, you can have access to the current and past NEIs through EPA’s NEI website…
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Was Jatropha analyzed for this final rule and, if so, what D-code applies?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The GHG emissions performance of a Jatropha-based pathway was not analyzed for the final rule because sufficient information was not available. Since EPA has not yet assigned a D code for this pathway, a producer cannot generate RINs…
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Are biogenic emissions included in the emissions trends Tier 1 data?
No, the biogenic emissions are not included in the emissions trends Tier 1 data. If needed, users can add the biogenic data either as a separate Tier, or specify its inclusion in the “Miscellaneous” Tier 1 group.
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How do I get access to the Emissions Inventory System?
Access to the Emissions Inventory System (EIS) is available to state, local, tribal agencies, their representatives (such as contractors), to multijurisdictional organizations (MJOs), and to EPA staff. The EIS is not available to the public. Instructions for access to the EIS is available in the Emissions Inventory System (EIS) User’s…
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What sources make up the Sectors or Tiers used in the emissions data summaries?
Tier 1 and Sector categories are assigned by source classification codes (SCCs) that are the most specific processes available in the NEI. The latest SCC list with the Tier 1 and Sector assignments can be downloaded from the EPA SCC website in Comma Separate Values (CSV) format.
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Where can I obtain the hourly data from Continuous Emissions Monitors (CEMs)?
The CEM emissions data are available from the EPA Clean Air Markets Program Data website.
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How can I get more detailed information? What measurements/sensors are used to measure emissions?
Access the latest NEI data set . Under 'Sector Summaries - Criteria and Hazardous Air Pollutants by 60 EIS emission sectors', > choose National > for Pollutant, choose PM10 Primary and/ or PM2.5-PRI > Sector, choose all sectors >Submit Query to see results at bottom of page. Open the results…
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Do you have any updates on the status of EPA’s modeling of palm oil biodiesel?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . EPA is actively continuing its FRM evaluation of biodiesel produced from palm oil. We expect to complete that analysis within approximately 6 months, as stated in the preamble to the final rule. All currently available documents including meeting…
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How do I reset my password for the Emissions Inventory System?
Instructions for resetting your password are available in the Emissions Inventory System (EIS) User’s Manual and How To’s section on “How Do I Update My Password?” Follow the instructions to reset your password.
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Where can I get maps and/or emissions of facility emissions data?
The EPA provides emissions maps in two ways. First, each of the last three NEI years have a “Facility Mapping” tab available on the main NEI page for that inventory year (for example, see the 2020 NEI page). With this tool, maps can be created for one state at a…
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