Key Issues, Websites and Programs for EPA’s Office of Transportation and Air Quality

EPA’s Office of Transportation and Air Quality

                     A-Z index 

  • Certification and Compliance for Vehicles and Engines
    This site provides compliance information to the vehicle and engine industry about certifying vehicles and engines through EPA, including paying fees and reporting to ensure compliance.
  • Clean Diesel and DERA Funding
    The Clean Diesel program offers DERA funding in the form of grants and rebates as well as other support for projects that protect human health and improve air quality by reducing harmful emissions from diesel engines.
  • Compliance and Fuel Economy Data for Vehicles and Engines
    Information about test data regarding vehicles emissions and fuel economy and how those certified emission levels and fuel economy label estimates are determined.
  • Diesel Fuel Standards
    Information about diesel fuel programs including regulations that significantly reduce the sulfur content of diesel fuel.
  • Emission Standards Reference Guide for On-road and Nonroad Vehicles and Engines
    The Emission Standards Reference Guide contains federal emission standards for onroad and nonroad vehicles and engines, and related fuel sulfur standards.
  • Fuel Economy
    Information about fuel economy, the fuel economy label and fuel economy trends.
  • Fuels Registration, Reporting & Compliance Help
    Information about the requirements for registration and health effects testing of new fuels or fuel additives and mandatory registration for fuels reporting and about mandatory reporting forms for parties regulated under EPA fuel programs.
  • Gasoline Standards
    Information about EPA’s gasoline regulations, including the Tier 3 Gasoline Sulfur program, the Mobile Source Air Toxics rule, Reformulated Gasoline (RFG) regulations, and volatility requirements.
  • Green Vehicle Guide
    The Green Vehicle Guide can help consumers find information on vehicles that are more efficient and less polluting. The site also addresses transportation’s role in climate change.
  • Importing Vehicles and Engines
    This site outlines EPA’s requirements for importing a motor vehicle or engine into the United States.
  • Mobile Source Pollution and Related Health Effects
    This site provides information on the health effects of air toxics from vehicles to both groups and individuals looking to further their subject knowledge, learn about EPA’s role in reducing air toxics, and find out how individuals can play a role.
  • MOVES and Other Related Models
    Information about EPA’s current official model for estimating air pollution emissions from cars, trucks, motorcycles and nonroad equipment. 
  • Ports Initiative
    The purpose of the ports initiative is to assist EPA and other participants to formulate strategies for moving forward on actions addressing the transportation, air quality and climate issues raised in the national conversations.
  • Regulations for Emissions from Vehicles and Engines
    Information about emission standards and regulations for on-road and nonroad vehicles, engines and equipment.
  • Renewable Fuel Standard Program
    Information about regulations, developed by EPA, in collaboration with refiners, renewable fuel producers, and many other stakeholders, that ensure that transportation fuel sold in the United States contains a minimum volume of renewable fuel.
  • SmartWay
    SmartWay is an EPA program that helps the freight transportation sector improve supply chain efficiency. SmartWay reduces transportation-related emissions, environmental risks for companies and increases global energy security.
  • State & Local Transportation
    This site provides information to state and local governments and their citizens on the ties between land use, transportation planning, and air quality.
  • Vehicles and Engines
    Find information on importing, certification and compliance, regulations for emissions, fuel economy, data and compliance and violations and recalls.
  • Vehicle & Fuel Emissions Testing
    This site provides information about EPA’s National Vehicle and Fuel Emissions Laboratory, which directly supports regulatory implementation, compliance and enforcement at a national level.  Staff at NVFEL evaluate emission control technology, test vehicles, engines and fuels, and determine compliance with federal emissions and fuel economy standards.
  • Violations and Recalls of Vehicles and Engines
    Information about violations and recalls of vehicles, engines, or equipment in a class or category that do not meet emission standards.
  • Verified Technologies for SmartWay & Clean Diesel
    This site provides information about  emission reduction capabilities and durability of emission reduction technologies.
  • Volkswagen Violations
    This site provides information on EPA’s issued notice of violation (NOV) of the Clean Air Act (CAA) to Volkswagen. The NOV alleges software that circumvents EPA emissions standards for certain air pollutants.