Regulations for Smog, Soot, and Other Air Pollution from Passenger Cars & Trucks
Overview
On March 20, 2024, EPA issued new, more protective standards to further reduce harmful air pollutant emissions from light-duty and medium-duty vehicles starting with model year 2027. The final rule leverages advances in clean car technology to unlock benefits to Americans ranging from improving public health through reducing soot- and smog-forming pollution from vehicles, to reducing climate pollution, to saving drivers money through reduced fuel and maintenance costs. These standards will phase in over model years 2027 through 2032.
Background
Passenger cars and trucks are regulated by EPA under "light-duty" vehicle programs. EPA regulates passenger vehicles to reduce the amount of harmful emissions. There are regulations for multiple aspects of passenger vehicles, including:
- Standards for exhaust and evaporative emissions;
- Control of hazardous air pollutants and air toxics;
- National Low Emission Vehicle Program;
- CAP 2000 (Compliance Assurance Program);
- Onboard refueling vapor recovery; and
- Inspection and maintenance.
List of Related Regulations
Below is a list of all regulations related to smog, soot, and other emissions from passenger cars and trucks.
Click the regulation titles for additional information, including:
- Rule summaries;
- Regulatory impact analyses;
- Comment summaries;
- Rule histories; and
- Fact sheets.*
*Note: Rule-related materials vary by rule.