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Acronyms and Chemical Notations
1 Introduction
2 2020 NEI contents overview
3 Nonroad Mobile
4 Onroad Mobile - All Vehicles and Refueling
5 Vegetation and Soils (BEIS) Emissions: CO, NO, and VOC
- 5.1 EPA-developed emissions
- 5.2 References
6 Agricultural and Non-agricultural Lands (STAGE) Emissions: NH3
7 Commercial Marine Vessels
8 Locomotives
9 Oil and Gas Exploration and Production
10 Portable Fuel Containers
11 Motor Vehicle and Structure Fires
12 Nonpoint Non-Combustion Mercury
13 Nonpoint Gasoline Distribution
14 Agricultural Silage
15 Agriculture - Crops and Livestock Dust
16 Dust: Residential Construction
17 Dust - Paved and Unpaved Roads {#road dust}
18 Mining and Quarrying
19 Commercial and Residential Cooking
20 Fuel Combustion – Residential Heating – Natural Gas, Oil, and Other
21 Campfires
22 Human and Animal Cremation
23 Asphalt Paving and Roofing Asphalt
24 Solvents
25 Compost
26 Waste Disposal - Open Burning – Land Clearing Debris
27 Open Burning - Residential Household Waste
28 Open Burning - Yard Waste
29 Waste Disposal - Publicly-Owned Treatment Works
30 Other NH3 Sources
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Section 8 Locomotives

This section documents (rail) emissions in the nonpoint data category. Refer to Section 1 for information on rail yard emissions in the point data category.