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Regulations for Emissions from Vehicles and Engines

EPA Regulations

Find information about Light- and Medium-duty Vehicles and Heavy-Duty Vehicles.

Onroad
- Regulations for onroad vehicles and engines.
See onroad rules
Nonroad
- Regulations for nonroad vehicles and engines.
See nonroad rules
Greenhouse Gas
Regulations for:
- Light-duty passenger cars & trucks
- Commercial trucks & buses
- Aircraft
- Federal fleets (EISA 141)
See greenhouse gas rules

Regulations for Emissions from Vehicles and Engines

EPA Regulations

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