2014 National Emissions Inventory (NEI) Data
On this page:
Documentation
The NEI database includes air emissions sources of both criteria of both criteria and hazardous air pollutants. Data are available for many facilities and as county totals. The 2014 NEI is the next inventory on the three-year cycle and the EPA will create it using data provided by State, Local and Tribal air agencies. The Emissions Inventory System (EIS) helps the EPA to build the NEI.
- 2014 NEI Technical Support Document (TSD)
- Supporting Data and Summaries
- 2014 NEI v1 Report
- 2014v2 NEI Interactive Report
2014 NEI Plan
- 2014 NEI Plan
- Appendix 1 - Suggested State/Local Tribal Timeline and QA Checks (xlsx)
- Appendix 2 - Control Device Code Retirements (xlsx)
- Appendix 3 - SCC Code Retirements (xlsx)
- Appendix 4 - Nonpoint SCCs Requiring Activity Data (xlsx)
2014 NEI Resources for State, Local, Tribal Agencies
Submittal Instructions and Supporting Data for 2014 NEI
Nonpoint
- Expected Pollutant List for Nonpoint SCCs (xlsx)
- SCCs EPA Plan to Estimate in 2014 (xlsx)
- Agricultural Field Burning SCC Changes (xlsx)
- Agricultural Burning Emission Factors (xlsx)
- 2014 Agricultural Burning and Grass/Pasture Estimated Emissions (zip) (zip)
- Nonpoint Estimate Schedule (xlsx)
- Point to Nonpoint Crosswalk (Point Subtraction) for 2014 NEI (xlsx)
- Nonpoint Sector EPA 2014 Draft Emissions
- Oil and Gas Summit
Rail (locomotives) and Commercial Marine
- 2014 EPA CMV Rail County Shape Fractions for Rail and Commercial Marine (5MB)
- Port Shape Files, May 2017 (zip) (25.6MB)
- Rail Line Shape Files, March 2016 (zip) (27.6MB)
- Shipping Lane Shape Files, May 2017 (zip) (24.3MB)
Onroad
Nonroad
Point
- Expected Pollutant List for Point SCCs (xlsx)
- 2014 Priority Facility (xlsx) (xlsx)
- Regulatory Code Crosswalk (xlsx)
- Emission Factors from WebFIRE and MATs Test Program on EGUs
- Emissions Factors for Particulate Matter from Natural Gas Combustion (xlsx)
- New and Revised Emission Factors for Flares and Certain Refinery Process Units
- Point - LTO estimates used in 2014NEIv1 Aircraft emission estimates (accdb)
Events
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Data Summaries
The data posted at this site will include only the latest version of the 2014NEI. This webpage should not be used as a reference for past versions of the NEI and users wanting a record of data used in their analysis should archive and document those inventories to meet their own archival needs. Users should not assume that the data posted on this site will stay the same as the data they use at a given point time.
The full detail data files for the Point, Onroad, Nonroad and Nonpoint data categories can be downloaded from the list below. Please note these files are larger than previous inventories and can be linked in Access if importing fails. These Source Classification Code (SCC) data files do not include “events” data-wildfires and prescribed burning emissions. The events data can be found at the “Prescribed/Wildfires by Pollutant” link below under “Other Emissions Summaries”. To obtain a complete inventory total, please include these data in addition to the 4 SCC data files provided here.
- Point (ZIP CSV) (127.0 MB)
- Onroad (ZIP CSV) (52.2 MB)
- Nonroad (ZIP CSV) (554.0 MB)
- Nonpoint (ZIP CSV) (90.0 MB)
Additional Summary Data
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Tribal Lands Emissions Summaries
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Other Emissions Summaries
- Facility-level by Pollutant: (ZIP) (26.0 MB) Facility-level summary
- Prescribed/Wildfires by Pollutant: (ZIP) (6.1 MB) County-level by SCC summary
- Biogenics: (XLSX) (2.4 MB) Monthly-county and state-annual summaries
- All Sectors: (ZIP)(409 MB) National-county/tribe aggregated - sector file
- Tier Summaries: National/State/County summaries for Tier 1, Tier 2 and Tier 3
Files that can be used for air quality modeling can be found at the Air Emissions Modeling.
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Data Queries
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Facility Mapping
The facility query provides a map of facilities for a selected state along with tabular data for the selected pollutant(s). Please note that the map only displays if there are less than 25 pollutants selected. If more than 25 pollutants are selected then only the tabular data will be displayed.