Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Air Monitoring at Agricultural Operations

Emission Standards for Farm Equipment - Engines

Additional Compliance Information
  • Combustion Portal 

Stationary internal combustion engines use pistons that alternatively move back and forth to convert pressure into rotating motion. Many types of stationary engines exist and are found on farms, including diesel engines, spark ignited engines, and reciprocating internal combustion engines. Air quality requirements vary for stationary engines, depending on whether the engine is new or existing, where the engine is located, and what type of ignition system is used.

  • Rule and Implementation Information for Stationary Internal Combustion Engines
  • Overview of RICE NESHAP Requirements for Stationary Agricultural Engines

Air Monitoring at Agricultural Operations

  • AFOS Air Home
    • Conservation Measures for Cropping Systems and Land Management
    • Conservation Measures for Livestock Systems
    • National Air Emissions Monitoring Study
    • Draft Air Emissions Estimating Methodologies for Animal Feeding Operations
    • NAEMS Status
    • Emission Standards for Farm Equipment - Boilers
    • Emission Standards for Farm Equipment - Engines
    • EPA USDA Agricultural Air Quality Memorandum of Understanding
    • EPA USDA Agricultural Equipment Statement of Principles
Contact Us about Air Monitoring at Animal Feeding Operations (AFOs)
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on May 6, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.