Diesel Agricultural Engines

This page last reviewed April 8, 2009


The amended Airborne Toxic Control Measure for Stationary Compression Ignition Engines (ATCM) (effective May 19, 2011) includes requirements for stationary and portable diesel-fueled engines used exclusively in agriculture.  Typically, these engines are used to pump water or provide power for growing crops or raising livestock.  The amended ATCM affects the sale, purchase, installation, and use of new/used and in-use stationary and portable agricultural engines.  The amended ATCM does not affect agricultural wind machines or motive (self-propelled) agricultural equipment with engines, such as tractors or harvesters; however, diesel engines not affected by the ATCM may be subject to other air quality regulations.  Diesel engines used in agricultural production are a source of emissions for diesel exhaust particulate matter (diesel PM) and other pollutants that have known health effects.  

If you have any questions about complying with the regulation, please contact your local air district (see the Air District Locator link to the left of this page, or view the Air Districts by zip code).


Agricultural Engine Buyers' Advisory

California emission standards and other requirements regulate the sale, purchase, rental/lease, and operation of diesel engines, including diesel engines used in agriculture.  ARB has recently become aware that used Tier 0 diesel agricultural irrigation pump and gen set engines advertised on EBay, Craig's List, and similar websites do not meet Stationary Diesel Engine Airborne Toxic Control Measure (ATCM) emission standards for the installation and use of agricultural engines.  ARB has notified these websites about the ATCM and requested that they publish disclaimers with ads for Tier 0 engines.  Please consult your local California air district prior to selling or purchasing any diesel agricultural pump or gen set engine, especially a used one.  

Agriculture Off-Road Tractors

ARB staff plan to consider measures to reduce emission from agriculture off-road tractors and other mobile equipment in the future.

Funding Assistance

For questions about the ATCM, please contact:  Alyssa Green  (916) 445-1034.
Or send inquiries to:
Air Resources Board
Stationary Source Division
P.O. Box 2815
Sacramento, CA  95812-2815

If you are interested in the requirements for new off-road diesel engines (tractors, harvestors, etc.), please go to the off-road equipment activities page.