You are here: EPA Home Technology Transfer Network Clearinghouse for Inventories & 

Emissions Factors Emissions Inventory Information 2005 National Emissions Inventory 

Data & Documentation 

2005 National Emissions Inventory Data & 

Documentation 

Explanation of File Formats

General Inventory Information

EPA developed the 2005 NEI v2 based on a reduced level of effort. Part of this reduced 

effort involved using some NEI 2002 v3 data in the NEI 2005 v2 as surrogates for 

emissions data representing 2005. Listed below is specific information on this issue for 

each data category in the 2005 NEI v2. 

Point Sources

 Mixture of 2002 and 2005 emissions. 2005 emissions from the following data sources 

2005 EGU emissions/heat input from EPA's Acid Rain Program 

HAP data received from States and industry to support the MACT program, 

including the recent Risk and Technology Review rulemaking 

2005 State, local, and tribal data submitted to EPA under the CERR 

HAP data from Toxic Release Inventory (TRI) for missing facilities and pollutants 

Off-shore platform data from Mineral Management Services (MMS) 

 The Start Date/End Date fields in the ALLNEIHAP and ALLNEICAP files document which 

data are 2005 emissions and which data are 2002 emissions. 

Nonpoint Sources 

 2002 emission estimates used for all nonpoint sourves except wildfires and prescribed 

burning 

 2002 VOC emissions from fireploaces were revised based on a new emission factor. 

Onroad Mobile Sources

 All emissions estimates based on 2005 vehicle miles traveled (VMT) and a 2005 run of 

the National Mobile Inventory Model (NMIM) 

Nonroad Mobile Sources

 All emission estimates based on 2005 run of the National Mobile Inventory Model 

(NMIM) 

Prior to using the 2005 NEI for analyses, users should consider whether the use of 2002 

data as a surrogate for the selected sources documented above materially affects their 

analysis. For example, analyses that require actual 2005 data for every source in the 

inventory would be limited since some sectors include 2002 emissions. Likewise, microlevel analyses focusing on specific sectors using a mixture of years would be similarly 

affected. 

EPA evaluates inventories, as part of a “modeling platform,” for use in regulation 

development or Regulatory Impact Analysis (RIA). The technique used is called model 

Technology Transfer Network 

Clearinghouse for Inventories & Emissions Factors

http://www.epa.gov/ttn/chief/net/2005inventory.html

Last updated on Tuesday, July 06, 2010

2005 National Emissions Inventory Data & Documentation | Clearinghouse for Emission ... Page 1 of 3

http://www.epa.gov/ttn/chief/net/2005inventory.html 6/28/2011
performance evaluation. These evaluations are intended to demonstrate that an air 

quality modeling platform has sufficient predictive capability by comparing the air quality 

modeling results to ambient data. The modeling platforms include not only the emission 

inventory data, but also the air quality model, meteorology simulations, initial conditions, 

boundary conditions, emissions processing assumptions for spatial and temporal 

allocation and other parameters needed for such simulations. These model performance 

evaluations are described in technical support documents (TSDs) created by EPA in 

support of regulatory actions and are referenced in preamble text and RIA documents. 

EPA use of the 2005 NEI v2 is limited to those cases where model performance is not 

adversely affected by the use of surrogate data based on pre-determined benchmarks. 

Inventory Documentation

Point

NEI Point 2005 Documentation Updated April 6, 2010 

Chromium Speciation 

EIS Code Look up tables Updated October 6, 2008 

NEI2005 Look up tables other than those included in EIS Code Look up Tables Updated 

April 4, 2009 

Mercury Speciation (ZIP 30K) Updated December 19, 2006. Profiles were updated for 2002 

NEI source categories including new data for mobile sources. 

Toxicity weighting factors (MDB 290K) Updated January 10, 2007. 

Mobile

2005 Mobile NEI Version 2 Report

Commerical Marine Vessels 2002 and 2005

Overview of 2005 Version Mobile

Inventory Data

Tier Summaries

Tiersummaries contain only criteria pollutants. The 42 category summaries contains boty 

criteria and HAPS. Both the tier summaries and the 42 category summaries contains data 

from all data categories (point, nonpoint and mobile). 

Tier_Summaries

42 Category Summaries

Mobile Sector Data

2005 NEI Version 2 SCC Summaries - SCC and pollutant descriptions are provided at EIS 

Code Tables

NMIM County Database (NCD) for 2005 V2 

If you have any questions, please contact Laurel Driveror(919) 541-2859 

Biogenic Sector Data

Biogenic Sector Data- Updated May 2010.

Point Sector Data

Version 2 of the 2005 NEI - The following zipped Access summary files were created in 

January 2009 and contain annual emissions in tons per year. If you have qny questions 

question, please contact Roy Huntley or (919) 541-1060. 

Point Facility Summary - For both CAPs and HAPs 

SCC Summary - For both CAPs and HAPs at county, state and national level. 

NAICS Summary - For both CAPs and HAPs 

ALLNEI HAP Annual 01233008 - Point stack summary data for HAPs only 

ALLNEICAP Annual 113020078 - Point stack summary data for CAPs only 

2005 National Emissions Inventory Data & Documentation | Clearinghouse for Emission ... Page 2 of 3

http://www.epa.gov/ttn/chief/net/2005inventory.html 6/28/2011
Posted Updates to Data 

November 20, 2008

Mobile 2005 v2 Summaries added 

NMIM Counter Database (NCD) for 2005 v2 added 

December 11, 2008

2005 Mobile NEI Version 2 Report 

 

Lead Summaries - State facility and process level table for Stationary Sources of lead 

emissions 

Nonpoint Sector Data

Version 2 of the 2005NEI - The following zipped Access summary files were created in 

January 2009 and contain annual emissions in tons per year. Only wildfires, prescribed 

burn and residential wood were updated from the 2005 Version1. If you have any 

questions, please contact Roy Huntley or (919) 541-1060. 

SCC Summary - For Both CAPS and HAPS at county, state and national level. 

National Emissions Inventory Input Format

NEI Code Tables 

2005 National Emissions Inventory Data & Documentation | Clearinghouse for Emission ... Page 3 of 3

http://www.epa.gov/ttn/chief/net/2005inventory.html 6/28/2011