Science & Technology
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Bioassessment and Biocriteria Program Status for Massachusetts: Streams and Wadeable Rivers
Biocriteria Program Status of Alabama
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Bioassessment and Biocriteria Program Status for Colorado: Streams and Wadeable Rivers
Biocriteria Program Status of Alabama
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Documentation for the Waste Reduction Model
This page describes and provides links to all documentation files associated with EPA’s Waste Reduction Model. The page includes a brief summary of the chapters documenting the greenhouse gas emission and energy factors.
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Volume 7 - Data Management Procedures
Discontinued Volume 7 on data management procedures from the Emissions Inventory Improvement Program (EIIP).
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Volume 3a - Area Source Methods - Additional Documents
Nonpoint (area) source emission reference materials from the Emissions Inventory Improvement Program (EIIP). Provides nonpoint source guidance on ammonia emissions from natural landscapes, fertilized soils, and nonagricultural sources.
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Volume 9 - Particulate Emissions
Particulate matter emissions estimation methods from the Emissions Inventory Improvement Program (EIIP)
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Emissions Inventory System - FAQ
Emissions Inventory System FAQs
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Industrial Sources - FAQ
NEI Industrial Sources FAQ
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What does "NEC" stand for in the emissions sectors?
NEC means “not elsewhere classified” and includes SCCs that are not assigned to any of the other specific industrial process sectors. If you look at the SCC code table available at the SCC web site and filter on the Sector name that includes “NEC”, you can see the type of…
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Volume 3b - Area Source Method Abstracts
Nonpoint (area) source emission reference materials from the Emissions Inventory Improvement Program (EIIP). Provides brief summaries of nonpoint methods for seven categories.
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Bioassessment and Biocriteria Program Status for Montana: Streams and Wadeable Rivers
Biocriteria Program Status of Alabama
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Poster Sessions of 2017 International Emissions Inventory Conference
Poster presented at the 2017 Emission Inventory conference.
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Bioassessment and Biocriteria Program Status for South Carolina: Streams and Wadeable Rivers
Biocriteria Program Status of Alabama
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Bioassessment and Biocriteria Program Status for U.S. Virgin Islands: Rivers and Wadeable Streams
Biocriteria Program Status of Bioassessment and Biocriteria Program Status for U.S. Virgin Islands: Rivers and Wadeable Streams
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Volume 10 - Emissions Projections, Final Report
Projected future emissions estimation methods from the Emissions Inventory Improvement Program (EIIP).
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Where can I find older NEI data (prior to 2008)?
The raw data and summaries that are 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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Where are the NAICS/ SIC and SCC codes changes that have been implemented for the 2017NEI?
Please refer to the NEI webpage for 2017 documentation , and follow the link for Appendix 2 - 2017 NEI Plan Code Changes. That Excel file described changes for the SCCs and NAICS and includes a helpful read me spreadsheet. Note that all SCC and NAICS changes for use in…
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The FTP download is not working; what do I do?
Option 1: The FTP site is active, but some browsers are no longer supporting the ftp:// protocol. You can access the same data by replacing “ ftp://newftp.epa.gov / ” with “ https://gaftp.epa.gov/ ” and keep the rest of the URL the same. The filenames you see will be shorter, but…
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Pollutant Emissions Summary Files for Earlier NEIs
Earlier NEI summary files for both criteria and hazardous air pollutants
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What is the definition of VOC?
There is a regulatory definition of VOC. It is found in 40 CFR 51.100. CFR - code of federal regulations. The definition relates to the intent and requirements of the Clean Air Act. Excerpt from “Volatile Organic Compounds” Definition per 40 CFR Part 51.100(s): " Volatile organic compounds (VOC) means…