Small Off-Road Engines (SORE)

Small Off-Road Engines (SORE) are spark-ignition engines rated at or below 19 kilowatts. Engines in this category are used in lawn and garden equipment as well as other outdoor power equipment and specialty vehicles.
More about this program

Email Updates

Keep up to date with the latest information regarding Small Off-Road Engines.

Engine Certification Guidelines

Evaporative Component Certification

Current Regulations & Regulatory History

Landscaper Workgroup

Zero-Emission Equipment Regulations

Small Engine Fact Sheet

Meetings & Workshops

FAQ

Exhaust & Evaporative Emissions Control Systems

Hoja Informativa de Motor Pequeño

Zero-Emission Equipment

SORE Applicability Fact Sheet

Incentive programs are available throughout California to help you purchase zero-emission lawn and garden equipment.

Zero-Emission Landscaping Equipment Incentive Programs

For the proposed regulatory amendments and other rulemaking documents that the Board considered during the public hearing in December 2021, please refer to the SORE rulemaking page.

SORE Rulemaking Page

CARB completed its Survey of Small Off-Road Engines (SORE) Operating within California.

Abstract and Executive Summary

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California Air Resources Board