FARMER program

Image by Tim Foster

The California Air Resources Board is making $135 million available under its Funding Agricultural Replacement Measures for Emission Reductions program.

The California Air Resources Board is making $135 million available under its Funding Agricultural Replacement Measures for Emission Reductions, or FARMER, program. The funds available through the FARMER program provide significant assistance to California farmers who face the most stringent air quality requirements in the nation. Farmers can apply to their local air districts to receive funding for voluntary agricultural vehicle and engine replacements.

The FARMER program provides funding for:

  • Heavy-duty truck replacements

  • Mobile off-road farm equipment replacements

  • Agricultural irrigation pump replacements

  • Zero-emission agricultural all-terrain vehicles (ATVs)

  • Off-Road Mobile Agricultural Equipment Trade-Up Pilot Project (only available in the San Joaquin Valley)


For more information or to apply for funds contact your local air district.

diesel regulations

Image by Zetong Li

In December 2008, the California Air Resources Board approved the Truck and Bus regulations to reduce particulate matter from diesel vehicles in California

Air Quality – Stationary Ag Engine Rule Information


An in-use stationary diesel agricultural engine (also referred to as in-use ag. engine) is a diesel-fueled engine located at a fixed site for the purposes of growing crops or raising fowl or other animals. Most are used to power irrigation pumps. They may also be used to power agricultural wind machines and to generate power for other agricultural purposes during electrical power failures or in remote locations

At a public hearing on October 21, 2010, the California Air Resources Board approved in-use ag. engine emission and other requirements as part of the amended Airborne Toxic Control Measure for Stationary Compression Ignition Engines (title 17, California Code of Regulations, sections 93115.1 through 93115.15) (Stationary Diesel Engine ATCM). The amendments became effective on May 19, 2011, and the Final Regulation is available at:

Control Measure for In-Use Stationary Diesel Agricultural Engines Fact Sheet - May 2016

Diesel Truck Regulations

In December 2008, the California Air Resources Board approved the Truck and Bus regulation to reduce particulate matter from diesel vehicles in California. Farm Bureau, along with many other agricultural groups worked tirelessly with the Air Resources Board to make less stringent requirements for owners of agricultural vehicles. In December, 2010 the Air Resources Board again made some amendments to the programs, specifically giving farmers and ranchers more time to comply. By April 29, 2011 fleets must report information about qualifying vehicles. By June 1, 2011 qualifying vehicles must also show ‘AG’ on both the left and right door. Those ‘AG’ labels can be purchased from the Farm Bureau by calling 916-685-6958.

Diesel truck operators should be meeting basic engine model year requirements.  To report information to the Air Resources Board you may visit the Truck Regulation Compliance Reporting System by clicking

Annual reporting by January 31 is the deadline.  Click here to see if your truck qualifies for reporting

tractor rule

Image by Heiko Janowski

In 2007, California Air Resources Board committed to developing a control measure to reduce emissions from in-use self-propelled off-road mobile agricultural equipment. 

The 2007 San Joaquin Valley 8-Hour Ozone State Implementation Plan (SIP), approved by U.S. Environmental Protection Agency (U.S. EPA), contained a commitment for the Air Resources Board (ARB or Board) staff to present to the Board in 2013 a regulation for mobile agricultural equipment that moves California towards meeting ambient air quality standards for the San Joaquin Valley by utilizing the cleanest available technologies.  In October 2013, the Board approved the State Implementation Plan Credit from Mobile Agricultural Equipment Regulation which provides the administrative mechanism for emission reductions resulting from mobile agricultural equipment program projects funded by the Carl Moyer Program to be eligible for SIP credit.  This regulation complements the San Joaquin Valley Air Pollution Control District's Rule 9610 that will ensure emission reductions achieved through local, State, and federal voluntary incentive programs from mobile agricultural equipment projects are eligible for SIP credit.  

In addition, a new SIP for the new 8-hour ozone standard for the San Joaquin Valley will be developed in 2015 for submittal to U.S. EPA in 2016.  The SIP will address additional reductions needed to attain the new 8-hour ozone standard by 2032 including strategies that will rely on the deployment of the cleanest technologies (primarily Tier 4 final engines) in the mobile agricultural equipment sector. While new SIPs will also be needed for other areas of the State, additional actions for mobile agricultural equipment beyond the emissions standards already adopted are not expected to be needed to meet the federal attainment deadlines.

Recognizing the need for additional emission reductions from the mobile agricultural equipment sector in the 2016 8-hour ozone SIP, staff will continue to work with the agricultural industry to develop a long-term strategy to increase the use of the cleanest technologies as they become available in the San Joaquin Valley.  This strategy would focus on the introduction of the cleanest technologies through a combination of incentives and regulation to help meet upcoming ozone standards.