Draft AP-42 Chapter 9, Section 4 - Livestock and Poultry Feed Operations and Air Emissions Estimating Methodologies for Animal Feeding Operations

Background

Under the 2005 Air Compliance Agreement (the Agreement) with the animal production industry, EPA is responsible for using NAEMS data to develop emission models for emissions of ammonia, hydrogen sulfide, particulate matter, and volatile organic compounds (VOCs) at animal feeding operations raising swine, broiler chickens, egg-laying operations, and dairies.

In 2013, EPA’s Science Advisory Board (SAB) reviewed the original draft emission models and made recommendations for improving their development. SAB’s recommendations have been incorporated into the draft emission models.

EPA has drafted a new AP-42 Chapter 9 Section 4 - Livestock and Poultry Feed Operations and included the associated emission model reports for animal feeding operations and VOC emissions from animal sectors for review.

The EPA is extending the public review period to August 18, 2025. Comments should be sent to the NAEMS Group (NAEMS@epa.gov).

Draft AP-42 Chapter 9, Section 4 - Livestock and Poultry Feed Operations

Draft AP42 Section 9.4 Livestock and Poultry Feed Operations Nov 2024 (pdf) (546.63 KB)

Fact Sheet Farm Models (pdf) (135.35 KB) , November 2024

Draft AP-42 Chapter 9, Section 4 - Livestock and Poultry Feed Operations and Air Emissions Estimating Methodologies for Animal Feeding Operations

Background

Draft AP-42 Chapter 9, Section 4 - Livestock and Poultry Feed Operations

Emission Model Reports For Animal Feeding Operations

Emission Data Files For Animal Feeding Operations

Air Monitoring at Agricultural Operations