17.1 Sector Descriptions and Overview
The emissions from this category are primarily from domesticated animals intentionally raised for the production of food, fiber, or other goods or for the use of their labor. The livestock included in the EPA–estimated emissions include beef cattle, dairy cattle, swine, poultry (layers and broilers), turkeys, goats, horses/ponies and sheep/lambs. We use the Farm Emissions Model (FEM; [ref 1, 2]) developed by Carnegie Mellon University (CMU) to estimate the EFs from swine, layers, broilers, beef cattle and dairy cattle. For the other animals estimated by EPA methods, we employ a nationwide average EF multiplied by appropriate activity data. The pollutants that EPA reports using its methods for this sector are NH3, VOCs, and some VOC-HAPs by animal type as described further below.
The SCCs shown in Table 17.1 represent those for which EPA provides nationwide estimates. SCC level 1 are “Miscellaneous Area Sources” and SCC level 2 are “Agricultural Production – Livestock” for all SCCs.
| SCC | SCC Level 3 | SCC Level 4 |
|---|---|---|
| 2805002000 | Beef cattle production composite | Not Elsewhere Classified |
| 2805018000 | Dairy cattle composite | Not Elsewhere Classified |
| 2805025000 | Swine production composite | Not Elsewhere Classified |
| 2805007100 | Poultry production - layers with dry manure management systems | Confinement |
| 2805009100 | Poultry production - broilers | Confinement |
| 2805010100 | Poultry production - turkeys | Confinement |
| 2805045000 | Goats Waste Emissions | Not Elsewhere Classified |
| 2805035000 | Horses/ Ponies Waste Emissions | Not Elsewhere Classified |
| 2805040000 | Sheep and Lambs Waste Emissions | Total |
It should be noted that there are other SCCs that make up this sector in the NEI, and SLTs can report them. However, they will be minor contributors to the overall emission levels from this sector and many of those data are removed via our “tagging” process and are reviewed carefully via our QA process so there is no double counting with emissions the EPA estimates and reports to the NEI.