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Western U.S. regional analysis - emissions inventories for Regional Haze planning


For western U.S. regional analysis using photochemical modeling for Regional Haze, WESTAR-WRAP is assisting state air agencies in their review of the 2014v2 NEI. The process will allow participants to review and provide updates to these inventories. Feedback and revisions to the inventories may be incorporated into air quality modeling by the WRAP for regional photochemical modeling.


The Regional Haze Planning Work Group for Emission Inventories and Modeling Protocol (RHPWG EI & MP) Subcommittee held four conference calls from July - September, 2018. The Subcommittee solicited comments from state and local air agencies in the WRAP region on EPA's 2014 NEIv2. The Work Group focused on pollutants and emissions sectors that had the potential to influence photochemical modeling for Regional Haze Planning, such as large PM sources and major point sources. Outcomes from the WG are listed below. WG meeting notes, an outline of the review process, and comments from participating agencies follow the WG summary.


  1. Summary Document (WRAP Regional Haze SIP Emissions Inventory Review Documentation)
  2. Unpaved road dust
    1. Updates for Oregon
    2. 2011 vs 2014 NEI PM10 Spreadsheet; 2014 NEIv2 PM10 Map; 2014 NEIv2 PM10 with Oregon revisions Map
  3. Construction dust
    1. Washington: updates to correct over-generalized EPA methodology
  4. Minor source submissions
    1. Agencies that submit minor source inventories to EPA Table
  5. Stack parameter review
    1. Default stack parameter lookups for WRAP states Spreadsheet
    2. California stack parameter updates
    3. Montana updates for Oldcastle facility
    4. North Dakota updates for a couple coal powered facilities
  6. Residential Wood Combustion
    1. Idaho: filled in missing pollutants (VOCs) in EPA's RWC estimates. WRAP modeling should check EPA estimates in other states.
    2. Washington: updates to fireplace emissions
  7. Facility updates
    1. California: Correction data for 13 facilities
    2. Wyoming: Updates for missing facilities; recommendations for representative point source emissions
  8. Nonpoint
    1. California updates for dust from solid waste, other sectors (see comments)
  9. Mobile sources
    1. Comments on California's use of EMFAC vs EPA's MOVES modeling
    2. Comments from Colorado on EPA methodology for determining vehicle age distributions
    3. Washoe County, NV indicated that their MOVES data, although submitted to EPA, was not included in NEI
    4. MOVES input submissions: Map showing states and counties that submitted CDBs for MOVES inputs. Figure 6-1 (2014 NEIv2TSD) Agencies that submitted local data for at least 1 CDB table are shown in dark blue. Note, California did their own MOVES runs and have their own MOVES output data file.
    5. Summary of the On Road Inputs to the 2014 NEIv2 pdf
  10. Updates from local agencies (generally not submitted to NEI)
    1. Pima County, Arizona ozone study
    2. LRAPA, Oregon provided updates for major point sources (pending confirmation that correct data are in NEI)
  11. Summary of updates received RHPWR EI & MP Subcommittee to the 2014 NEIv2
    1. Emissions update table (compares the magnitude of emissions in the NEI vs updates for key pollutants). See Summary Document (Item #1 in Outcomes, above), Table 2.
    2. The WG recommends that the contractor for WRAP AQ modeling process updates received through this process and provide a comparison to similar data in the 2014 NEIv2
  12. Comments submitted by state and local agencies
    1. Table 1 in Section 4 (below)
  13. 2014 NEIv2 datasets
    1. EPA's summary data for WRAP states Spreadsheet
    2. EPA's summary data at US State/County/Tribal levels: Web based map tool
    3. EPA's 2014 modeling platform, point inventories and facility data spreadsheets for WRAP states and tribes (see Option 3, below)

Pending Issues

  • Various sources/sectors for Alaska as available
  • Various sources/sectors for Pima County as available


February 28, 2019 - Workgroup Call 8


Meeting Notes

  1. Welcome, Roll Call (Arizona note-taking) - Farren
  2. Modeling Timeline Review - Tom
  3. Review Representative Guidance Document draft ( attached) - Farren
  4. Determine Deadlines for Emissions Updates Data (v2 Base Year, Representativeness, OTW/OTB Future Case, Control Future Case) – Farren
  5. Washington’s method for representativeness screening and determination - Farren
  6. Discuss need for guidance by EI&MP SC for state projections of future emissions scenarios for 2028 OTB/OTW, for stationary sources – Farren and all

January 31, 2019 - Workgroup Call 7


Meeting Notes

  1. Welcome, Roll Call, Note-taking duties, Agenda Review – Farren (5 mins.)
  2. Review of 2014 NEI updates for contractor processing of emissions for Shakeout Modeling Platform – Farren (10 mins.)
    1. White paper review/updates for docketing process (WRAP Regional Haze SIP Emissions Inventory Review Documentation)
  3. Do western states want to give onroad / nonroad mobile model 2016 activity inputs for the 2016 national emissions modeling platform – Tom (5 mins.)
  4. Facility representativeness in the 2nd round of 2014 base year modeling – Farren (15 mins.)
    1. Timing (Modeling Timeline )
    2. Actual vs. representative emissions
    3. EI & MP Subcommittee memo or other documentation
    4. How to represent Pima County point sources in the second round of 2014 base year modeling – Janice Easley
  5. 2028 “Rules on the Books” emissions projection specification development process - Tom and Farren (10 mins.)
  6. Volunteers to work with Fire & Smoke WG on specifying representative baseline and future wildfire and prescribed fire emissions scenarios (Planning Baseline and Future Fire EIs white paper ) – Tom and Matt Mavko (5 mins.)
  7. Next call date and time, suggestions for topics – Farren and all (5 mins.)

November 29, 2018 - Workgroup Call 6

Note Taker: Curt Taipale, CO

Meeting Notes


  1. Welcome and Roll Call
  2. Review and finalization of EI Review Checklist and Documentation (attached)
  3. Discussion of On-Road Inputs document (attached)
  4. Presentation of IWDW Emissions and Modeling process document (updated draft below)
  5. Issues Encountered During EI Development
  6. Next call – Dec. 27th, 1200 PM MST


October 30, 2018 - Workgroup Call 5

Note Taker: Montana

Meeting Notes


  1. Clarify Stack Parameter Review (Fugitive Sources have Erptype =1)
  2. Clarification on how EI data reported by tribes is handled in this database
  3. MOVES input analysis volunteer request
  4. Review EI & MP Review Checklist (see materials)
  5. Review EI & MP Base Year Inventory documentation (see materials)
  6. White paper to be presented at TSC WG Co-Chairs meeting December 4-6 in Utah
  7. Point Source Representativeness plans clarification (Tom)
  8. Next call date and time


September 26, 2018 - Workgroup Call 4

August 30, 2018 - Workgroup Call 3

July 26, 2018 - Workgroup Call 2

June 28, 2018 - Workgroup Call 1


The initial review step for EPA's 2014v2 NEI following a three phase process is described in this May 22, 2018 memo. The initial review aspects listed in the memo can be evaluated using 3 data review options below. Option 1 is a high level review will look at tabular state and county inventories for key pollutants. Option 2 will enable a more detailed review to examine additional inventory parameters, such as individual point sources. Option 3 will allow review of a map-based emissions inventory review tool provided by the IWDW. Additional description and materials for the review process are provided below. Subsequent memoranda for additional review of 2014NEIv2 and other base and projection inventories will be added over time.

Option 1

Sector summary spreadsheet and charting tool. State and county level emissions totals for pollutants CO, NH3, NOx, PM10, PM2.5 and SO2.

2014v2_allsector_summary_WRAP_crosstab.xlsx (provided by Farren Herron-Thorpe, Washington State Dept. of Ecology)

Modified version of the above spreadsheet that includes state/tribal summaries and calculations of anthropogenic totals and 80% threshold. (see the "Readme" tab)

FHT2014NEIv2_summary.xlsx (provided by Roslyn Higgin, NMENV)

Facility emissions summaries from 2014 NEI v2. Excel spreadsheet with a list of all the facilities in each state, broken down by EI Sector, so that comparisons can be made to the sector summary if desired. There is also a sheet that lists all the facilities with a “Q” greater than 1 Ton.

WRAP_Facility_CAPs_Summary.xlsx (provided by Farren Herron-Thorpe)

Option 2

Data for individual point sources for 16 pollutants from EPA's 2014v2 modeling platform. The point data are for non-fire inputs, e.g. pt_oilgas, ptegu, ptnonipm (and cmv_c3 for California, Oregon and Washington). The Excel spreadsheets contain parameters such as annual emissions, facility name and ID, and stack parameters where applicable.

Option 3

Emissions review tool for EPA's 2014 NEIv2 (data originate from EPA's "allsector" county and tribal level inventories). Note: these are the same data as were used in the spreadsheets in Option 1, above, although they include the entire US rather than just WRAP states. The NEI data are shown as tabular data, state and county maps, and pollutant and emissions sector pie charts.

2014 NEIv2 map tool:

Comment Memos from Reviewing Agencies

Comment memos from reviewing agencies are posted below by inventory reviewed. States may need to coordinate with tribes and local air agencies for review completeness. There may be multiple comment memos from an agency for the same inventory. These comments will be addressed in the processing of the inventories for regional haze modeling.

Note from Farren Herron-Thorpe regarding interpretation of the summary data spreadsheets under Option 1, above:

I wanted to give some clarification regarding the NEI Sector Summary data that was sent out previously. The way that EPA separates this information is not immediately intuitive. This is because the sector summary is aggregated by SCC, not NAICS code. The SCC table that EPA provides has each SCC matched to an EI sector which is the basis for the sector summary.

For example, if you look at the emissions totals for “Industrial Processes – Petroleum Refineries”, it will be less than the total facility emissions for all petroleum refineries. All boiler emissions are added into the “Fuel Combustion – Industrial Boilers, xxxxx” category, even if they are at a refinery facility.

If you would like to see how your facilities have been split up amongst the sector summary categories, I can send you out a table for your state.

Table 1

StateReviewing Agency2014NEIv2 InventoryCommentsAttachmentsDate
AlaskaDAQAirport, marine, dust, wildfires, O&GSee attachmentAlaska comments7/25/2018
 DAQMinor sourcesList of minor sources reported for 2014 NEIAlaska memo10/3/2018
ArizonaAZDEQAll sectorsNo substitutions neededArizona comments6/27/2018
 AZDEQPoint source stack parametersList of descriptors for non-airport SCCs with missing stack parametersComments on point source SCCs, AZSCCDescriptors8/3/2018
 AZDEQPoint source stack parameters missing valuesNo updatesReview of missing stack parameters9/14/2018
 Maricopa County AQDnonpoint; point source; onroadnonpoint data are accurate; there are more accurate point source data that did not make it into the NEI due to a formmating error; onroad looks OKMaricopa County comments, Maricopa County point source updates9/25/2018, 10/2/2018
 Pima County DEQ Attached data were not submitted to EPA for inclusion into the 2014 NEIv2 dataset. These are Pima DEQ’s best estimates for 2014. Inventories include annual NOx and VOCs, along with OSD, estimates. Note that inventories represent the eastern portion of Pima County.Pima County comments, Pima_County.zip7/30/2018
 Pinal CountyAll sectors, including unpaved road dustEI person is reviewing; will respond with commentsPinal County comments9/24/2018
 AlbuquerqueAll sectorsNo need for any changesAlbuquerque comments5/17/2018
 AlbuquerqueptnonipmSO2 Albuquerque Southside Reclamation PlantAlbuquerque Southside Reclamation Plant_facility_id_145_SO2_total.xlsx12/27/2018
CaliforniaCARBMobile SourcesEmail thread regarding use of CA's EMFAC vs. EPA's MOVES model for mobile source emissionsCARB Comments5/1/2018
 CARBFacility point sourcesCorrection data file for point source emissions from 13 facilitiesFacilities correction data file, Facilities correction memo7/18/2018
 CARBFacility point sourcesStack parameter updates for point source emissionsStack Parameters of CARB Point Sources Correction Data 8-14-2018, Stack Reference to Facility-Unit-Emissionsprocess 8-14-2018,Stack parameters update memo7/18/2018
 CARBNonpoint, Nonroadsee attachmentCARB Comments Huth7/20/2018
 CARBnonpoint updates in FF10 formatZip file containing one file to remove cattle husbandry dust from solid waste categories; three files with "hard zeros" for various pollutants and counties in sectors relating to industrial boilers, oil and gas, and poultry husbandry.California FF10 updates; Memo Huth10/05/2018
 CARBAnthro. sectorsFull replacement for anthropogenic sectorsOverview of CARB replacement data for 2014 and 2018 modeling, Wildfires and biogenics exceptions to CARB replacement data11/1/2018, 11/27/2018
ColoradoCDPHEAll sectorsSectors appear consistent with [Colorado] dataColorado Comments5/16/2018
 CDPHEOnroad MobileIssue with how EPA treated vehicle age distributions in 2014 NEIColorado comments on MOVES vehicle age distribution10/3/2018
HawaiiHDoHSee comments and data attachmentsSee attached commentsHawaii comments; Hawaii Comparison of Phase 1 spreadsheet to HI SLEIS; HI Data Pt Src review6/13/2018
IdahoIDEQResidential wood combustionUpdates to 2014v2 RWC inventories for IdahoIdaho Comments; 2014 NEIv2 RWC Corrected5/30/2018
MontanaMTDEQAll sectorsNo changes to 2014 NEI; potential issues with O&G inventories in Big Horn Basin (review pending)Montana Comments6/14/2018
 MTDEQStack parametersUpdates for Oldcastle facilityOldcastle update file, Montana memo10/5/2018
 MTDEQoilgas, ptegu, ptnonipmData missing from NEIv2MT updates for oilgas ptegu; MT updates for oilgas ptegu ptnonipm data1/16/2019;8/13/2018
NevadaNDEPAll sectors, emphasis on major point sourcesNo changes at this time; Washoe County indicated their MOVES inputs were not includedNevada comments6/20/2018
 Clark CountyAll sectorsData are OK to use as isClark County comments9/26/2018
 Washoe Countyall sectorsNEI data are correct for Washoe CountyWashoe County comments9/25/2018
 NDEPdefault stack parametersClarification on fields in default stack parameter fileNDEP Memo Harpring10/9/2018
New MexicoNMENVAll sectorsEPA’s change in methodology from 2011 to 2014 reduced road dust emissions by 50%. In 2014, VMT was obtained from a MOVES run instead of an NMIM run, and separated into paved and unpaved values based on census-region level ratios.New Mexico Comments 1, New Mexico Comments 27/19/2018,7/23/2018
North DakotaDoHPoint source stack parametersStack parameter replacements for a couple of their coal power facilities, noted in red (columns S thru W)2014NEIv2_stack_revisions_ND10/8/2018
 DoHPoint sources and other sectorsInventories look reasonableNorth Dakota Comments5/30/2018
OregonODEQnonpoint nonroad onroadEPA data is accurate for Oregon nonpoint, nonroad and onroad sources. See comments.Oregon Comments7/25/2018
 ODEQPoint sourcesEPA data are accurate for Oregon point sourcesOregon Comments Swab, Oregon Comments Stocum, Point source review materials8/6/2018
 ODEQUnpaved Road DustReview by the RHPWG EI & MP Subcommittee indicates abnormally high values for OREmail correspondence indicating WA may provide updates for OR unpaved road dust emissions9/5/2018
 LRAPAMajor point sourcesUpdates provided to EPA. Pending confirmation that correct data is in NEIOregon LRAPA comments9/25/2018
 ODEQUnpaved roadsAdjustments made by WA-ECYUnpaved road adjustments, map showing revisions, Memo10/3/2018
South DakotaDENRAll sectorsNo changesSouth Dadota Comments6/28/2018
UtahUDEQnon-point SOx, non-road mobile diesel locomotive SO2Updates provided, other sectors look OK for RH modelingUtah Comments, SOxDiscrepancyOpenBurningLandClearing_Utah, On- and Non-road Mobile Sources Comparison8/9/2018
WashingtonEYCConstruction DustEPA's emissions calculation methodology for construction dust is over-generalized for Washington stateWashington Comments, WA_2014_ConstructionDust_EI_Revisions.xlsx4/24/2018
 EYCFireplace emissionsUpdated fireplace emissions for four counties in the Puget Sound areaWA_2014_Fireplace_EI_Revisions.xlsx WA_2014_Fireplace_EI_Revisions.docx6/27/2018
WyomingWDEQUnpaved road; point sourcesRaised concerns for Unpaved Road Emission; recommendations for representativeness of point source emissionsWyoming Comments6/14/2018
 WDEQFacilities emissions not in NEISee attached50 Buttes and House Creek Emissions7/6/2014


  • Now available! *2014 National Emissions Inventory (NEI) Report* This new highly visual and interactive Report shows graphs, tables, and maps that summarize national and state emission trends and emission profiles for states and counties based on the 2014 NEI v2 data. With this tool, users can explore the emissions data and answer basic questions they have about the NEI and emission trends by looking at what the data shows for national, state, and local areas. The Report distills a considerable amount of data detail inherent to the NEI and provides emission summaries for the criteria pollutants, black carbon, and 5 select HAPs. It is not a query tool for accessing all details of the entire 2014 NEI data. NEI data access query tools and detailed data files remain available on the EPA NEI program website. Please explore the 2014 NEI Report and bookmark it on The Report is also posted on the NEI program website

  • The 2014v2 NEI Technical Support Document is posted on the 2014. NEI website

Future 2016 Modeling Platform Review