| EPA Emission Standards
for Heavy-Duty Vehicles
Federal School Bus Regulations
EPA Emission Standards for Passenger Vehicles
EPA Emission Standards for Nonroad Engines, Equipment
and Vehicles
Fuels and Fuel Additives
EPA Emission Standards for Heavy-Duty
Vehicles
- EPA is working aggressively to reduce pollution from new heavy-duty
diesel trucks and buses, by requiring them to meet tougher and tougher
emission standards in the future.
- A new set of standards took effect starting with 2004 model year engines and a set of
even more stringent standards will take effect in 2007. At that time, new heavy-duty vehicles will be up to 95 percent cleaner than today's vehicles.
- Because diesel engines are durable and long-lasting, it will take
a long time for new vehicles to replace the heavy-duty trucks and buses
currently on the road. Clean School Bus USA is designed to jump-start
the process of upgrading the fleet so that today's generation of school
children can reap the benefits of technologies that are available now
to reduce emissions.
- Learn more about the history of EPA emission standards for passenger
vehicles and view a timeline for heavy-duty vehicles.
Federal School Bus Regulations
- Although EPA sets emissions standards for diesel and natural gas engines,
EPA does not regulate school bus safety or use. The National Highway
Traffic Safety Administration (NHTSA) promulgates federal
regulation of school bus safety
including the use of safety belts on school buses.
EPA Emission Standards for Passenger
Vehicles
- EPA sets stringent emission standards for passenger vehicles. Beginning
in 2004,
both cars and light-duty vehicles such as pick-up trucks, sport utility
vehicles, and minivans became subject to the same national pollution
control system. This will yield a 77 to 95 percent reduction in emissions
over year 2000.
- Learn more about the history of EPA emission standards for passenger
vehicles.
EPA Emission Standards for Nonroad Engines,
Equipment and Vehicles
- EPA also sets emission standards for a range of gasoline- and diesel-
powered engines, equipment, and vehicles that typically are not used
on roads, streets and highways. These vehicles include construction,
farm, and mining equipment, lawn equipment, chainsaws, snowmobiles,
all-terrain vehicles, personal water craft, marine vessels, aircraft,
and locomotives. These emission control programs significantly reduce
the impact that nonroad engines and equipment have on the nation's air
quality.
- Learn more about the history of EPA emission standards for nonroad
engines.
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