Carl Moyer Program

Applications for the Yolo-Solano AQMD region are not being accepted at this time.
Please check back for updates or changes.

Businesses within the Yolo-Solano AQMD can apply for substantial grants to help fund projects that will upgrade emission controls on heavy duty off-road vehicles through the Carl Moyer Program.

Locally, the Moyer Program is administered through the Sacramento Metropolitan AQMD to maximize regional efficiency. Eligible projects include emission control upgrades of agricultural equipment (tractors, balers, irrigation pumps) and construction equipment (tractors, backhoes).  For more information about the program, visit SMAQMD’s Moyer page.

Here are brief descriptions of Moyer-eligible projects.

Agricultural Irrigation Pump Motor Electrification

Convert diesel irrigation pumps to electric.

Agricultural & Construction Equipment Replacement

The Off-Road Equipment Replacement Program (ERP) provides funds to replace Tier 0, high-polluting off-road diesel equipment with the cleanest available emission level equipment. Applies to existing diesel self-propelled equipment 25 HP or greater.

Engine Repower

The Off-Road Engine Repower Program provides funds for the incremental cost of cleaner-than-required engines for agriculture equipment, construction equipment, and non-pleasure craft, commercial marine vessels 25 HP or greater.

Engine Retrofit

The Off-Road Engine Retrofit Program provides funds to retrofit off-road diesel engines with the highest level Verified Diesel Emission Control Strategy (VDECS). VDECS reduces harmful engine exhaust emissions resulting from an engine’s post combustion process. Applies to equipment 25 HP or greater.


Both the Carl Moyer Program and Goods Movement Emission Reduction Program (GMERP) provide funds to replace, rebuild or repower locomotives. The GMERP applies to locomotives used in goods movement operation in California that can prove at least 50 percent operation on trade corridors within the past 24 months.