View Source Files
Acronyms and Chemical Notations
Executive Summary
1
Introduction
1.1
What data are included in the 2023 NEI release?
1.2
What is included in this documentation?
1.3
Where can I obtain the 2023 NEI data?
1.4
Why is the NEI created?
1.5
How is the NEI created?
1.6
Who are the target audiences for the 2023 NEI?
1.7
What are appropriate uses of the 2023 NEI and what are the caveats about the data?
2
2023 NEI contents overview
2.1
What are EIS sectors?
2.2
How is the NEI constructed?
2.3
What are the sources of data in the 2023 NEI?
2.4
What are the top sources of some key pollutants?
2.5
How does this NEI compare to past inventories?
2.6
How well are tribal data and regions represented in the 2023 NEI?
2.7
What does the 2023 NEI tell us about mercury?
2.8
References for 2023 inventory contents overview
3
Point sources
3.1
Sector Desciption
3.2
Point source approach: 2023
3.3
Airports: aircraft-related emissions
3.4
Rail yard-related emissions
3.5
EGUs
3.6
Landfills
3.7
BOEM
3.8
PM Species
3.9
Documented Known Issues at the time of release
3.10
References
4
Nonroad Mobile
4.1
Sector Description
4.2
Computing Nonroad emissions using MOVES
4.3
Additional Data: Nonroad County Databases (CDBs)
4.4
MOVES runs and Postprocessing Steps
4.5
Use of California Submitted Emissions
4.6
References
5
Onroad Mobile - All Vehicles and Refueling
5.1
Sector Description
5.2
Overview of Input Data Sources for 2023
5.3
Sources of Data and selection heirarchy
5.4
California-submitted onroad emissions
5.5
Agency-submitted MOVES inputs
5.6
Calculation of Emissions
5.7
Summary of quality assurance methods
5.8
Supporting data
5.9
References for onroad mobile
6
Nonpoint Overview
6.1
Nonpoint source approaches
6.2
Sources of data overview and selection hierarchies
6.3
Nonpoint PM augmentation
6.4
Nonpoint HAP Augmentation
6.5
EPA nonpoint data
6.6
Nonpoint Quality Assurance
7
Vegetation and Soils (BEIS) Emissions: CO, NO, and VOC
7.1
EPA-developed emissions
7.2
References
8
Agricultural and Non-agricultural Lands (STAGE) Emissions: NH3
8.1
Sector Descriptions and Overview
8.2
EPA-developed estimates
8.3
EPA-developed Non-agricultural Land NH3 Emissions
8.4
NH3 Emission Summaries and Analysis
8.5
Improvements/Changes to 2023 NEI
8.6
References
9
Commercial Marine Vessels
9.1
Sector Descriptions and Overview
9.2
Sources of data
9.3
EPA-developed estimates
10
Locomotives
10.1
Sector Descriptions and Overview
10.2
Sources of data
10.3
EPA-developed estimates
11
Oil and Gas Exploration and Production
11.1
Sector Descriptions and Overview
11.2
Sources of data
11.3
EPA-developed estimates
11.4
References
12
Portable Fuel Containers
12.1
Sector Descriptions and Overview
12.2
EPA-developed estimates
12.3
References
13
Fires – Wild, Prescribed, and Agricultural Field Burning
13.1
Sector Descriptions
13.2
Summary of changes in this NEI for fires
13.3
Wildfire season summary for 2023
13.4
Sources of year-2023 activity information
13.5
Emissions methodology and information
13.6
Emissions Summaries
13.7
References
14
Motor Vehicle and Structure Fires
14.1
Sector Description and Overview
14.2
EPA-developed estimates
14.3
References
15
Nonpoint Non-Combustion Mercury
15.1
Sector Descriptions and Overview
15.2
EPA-developed estimates
15.3
References
16
Nonpoint Gasoline Distribution
16.1
Sector Descriptions and Overview
16.2
Sources of data
16.3
EPA-developed estimates
16.4
References
17
Agriculture - Livestock Waste
17.1
Sector Descriptions and Overview
17.2
EPA-developed emissions
17.3
Emissions Summaries
17.4
References
18
Agricultural Silage
18.1
Sector Descriptions and Overview
18.2
EPA-developed estimates
18.3
References
19
Dust: Agriculture Crops and Livestock
19.1
Sector Descriptions and Overview
19.2
EPA-developed estimates
19.3
References
20
Dust: Residential Construction
20.1
Sector Descriptions and Overview
20.2
EPA-developed estimates
20.3
References
21
Dust: Non-Residential Construction
21.1
Sector Descriptions and Overview
21.2
EPA-developed estimates
21.3
References
22
Dust: Road Construction
22.1
Sector Descriptions and Overview
22.2
EPA-developed estimates
22.3
References
23
Dust: Paved and Unpaved Roads
23.1
Sector Descriptions and Overview
23.2
EPA-developed estimates
23.3
References
24
Dust: Mining and Quarrying
24.1
Sector Descriptions and Overview
24.2
EPA-developed estimates
24.3
References
25
Commercial and Residential Cooking
25.1
Sector Descriptions and Overview
25.2
EPA-developed estimates
25.3
References
26
Fuel Combustion – Nonpoint Industrial and Commercial/Institutional Boilers and ICEs
26.1
Sector Descriptions and Overview
26.2
EPA-developed estimates
26.3
References
27
Fuel Combustion – Residential Heating – Natural Gas, Oil, and Other
27.1
Sector Descriptions and Overview
27.2
EPA-Developed Estimates
27.3
References
28
Fuel Combustion – Residential Heating: Wood
28.1
Sector Descriptions and Overview
28.2
EPA-developed estimates
28.3
References
29
Campfires
29.1
Sector Descriptions and Overview
29.2
EPA-developed estimates
29.3
References
30
Human and Animal Cremation
30.1
Sector Descriptions and Overview
30.2
EPA-developed estimates
30.3
References
31
Asphalt Paving and Roofing Asphalt
31.1
Sector Descriptions and Overview
31.2
EPA-developed estimates
31.3
References
32
Solvents
32.1
Sector Descriptions and Overview
32.2
EPA-developed estimates
32.3
References
33
Compost
33.1
Sector Descriptions and Overview
33.2
EPA-developed estimates
33.3
References
34
Open Burning – Land Clearing Debris
34.1
Sector Descriptions and Overview
34.2
EPA-developed estimates
34.3
References
35
Open Burning - Residential Household Waste
35.1
Sector Descriptions and Overview
35.2
EPA-developed estimates
35.3
References
36
Open Burning - Yard Waste
36.1
Sector Descriptions and Overview
36.2
EPA-developed estimates
36.3
References
37
Publicly-Owned Treatment Works
37.1
Sector Descriptions and Overview
37.2
EPA-developed estimates
37.3
References
38
Other Ammonia Sources
38.1
Sector Descriptions and Overview
38.2
EPA-developed estimates
38.3
References
View Source Files
Section 8
Agricultural and Non-agricultural Lands (STAGE) Emissions: NH3