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Federal Emission Standards
On this page
- Light-Duty Vehicles and Trucks
- Motorcycles
- Driving Cycles
- Heavy-Duty Engines and Vehicles
- Nonroad Engines and Vehicles
- Fuel Sulfur Standards
Light-Duty Vehicles and Trucks
- Clean Fuel Fleet -- exhaust emission standards
- Clean Fuel Fleet flexible fuel and dual fuel vehicles -- non-methane organic gas standards
- Tier 0, Tier 1, and Clean Fuel Vehicle (CFV) exhaust emission standards (light-duty trucks only)
- Tier 0, Tier 1, and National Low Emission Vehicle (NLEV) implementation schedule
- Tier 0, Tier 1, NLEV, and CFV exhaust emission standards
- Tier 1 and NLEV Supplemental Federal Test Procedure (SFTP) exhaust emission standards
- Tier 1 and NLEV evaporative emission standards and implementation schedule
- Tier 2 and interim non-Tier 2 SFTP exhaust emission standards
- Tier 2 evaporative emission standards
- Tier 2 exhaust emission standards and implementation schedule
Motorcycles
Driving Cycles
- EPA Federal Test Procedure (FTP)
- EPA SC03 SFTP with air conditioning
- EPA Urban Dynamometer Driving Schedule (UDDS)
- EPA US06 or SFTP
- LA92 "Unified" Dynamometer Driving Schedule
Heavy-Duty Highway Engines and Vehicles
- Clean Fuel Fleet program -- exhaust emission standards
- Compression-ignition (CI) engines and urban buses -- exhaust emission standards
- Spark-ignition (SI) engines -- exhaust emission standards
- SI and CI engines -- evaporative emission standards
Nonroad Engines and Vehicles
- Aircraft -- exhaust emission standards
- CI engines -- exhaust emission standards
- Large SI engines -- exhaust and evaporative emission standards
- Locomotives -- exhaust emission standards
- Marine CI engines -- exhaust emission standards
- Marine SI engines and vessels -- exhaust emission standards
- Recreational engines and vehicles -- exhaust emission standards
- SI engines 19 kilowatts (kW) and below -- exhaust emission standards
- SI engines 19kW and below, recreational engines and vehicles, and marine SI engines -- evaporative emission standards
Fuel Sulfur Standards
- Gasoline sulfur standards
- Highway, nonroad, locomotive, and marine (NRLM) diesel fuel sulfur standards