Transportation and Air Quality
- As I purchased one of these ATVs last year, how will this action affect me?
- How will the proposed Tier 3 vehicle and fuel standards create health benefits for Americans?
- Over the past several years, what have been the technological and environmental trends in automotive fuel economy?
What's New in OTAQ
OTAQ Recent Additions
- May 16: EPA authorized California emissions regulations applicable to in-use, nonroad yard trucks and two-engine sweepers.
- April 29: The 2nd Report to Congress is now available covering DERA grants and resulting emissions reductions from 2008 to 2010.
OTAQ Press Releases
- May 10, 2013: MONDAY: EPA to Recognize Center for Transportation and the Environment and Delta Airlines for Grant Project Completion
- April 3, 2013: EPA Voids Certificates Approving Import of Over 70,000 Small Recreational Vehicles
- March 29, 2013: EPA Proposes Achievable Cleaner Fuels and Cars Standard, Slashing Air Pollution and Providing Extensive Health Benefits
OTAQ Federal Register Notices
- May 10, 2013: Approval and Promulgation of Air Quality Implementation Plans; Ohio; Canton-Massillon 1997 8-Hour Ozone Maintenance Plan Revision to Approved Motor Vehicle Emissions Budgets
- May 10, 2013: Approval and Promulgation of Air Quality Implementation Plans; Indiana; Lake and Porter Counties, Indiana, 1997 8-Hour Ozone Maintenance Plan and 1997 Annual Fine Particulate Matter Maintenance Plan Revision to Approved Motor Vehicle Emissions Budgets
- April 18, 2013: Supplemental Determination for Renewable Fuels Produced Under the Final RFS2 Program From Grain Sorghum; Correction
EPA's Office of Transportation and Air Quality protects public health and the environment by regulating air pollution from motor vehicles, engines, and the fuels used to operate them, and by encouraging travel choices that minimize emissions. These "mobile sources" include cars and light trucks, heavy trucks and buses, nonroad engines, equipment, and vehicles. For more information see:
- About the Office of Transportation and Air Quality (OTAQ)
- About the National Vehicle and Fuel Emissions Laboratory (NVFEL)
OTAQ's top sites
OTAQ's programs and website topics (A detailed list of programs and topics is on our site map.)
Overview:Pollutants & Programs
Information on how much air pollution, air toxics, and greenhouse gases are emitted by mobile sources, the programs OTAQ has undertaken to control these emissions, and the impact of those programs on air quality and climate change.
On-Road Vehicles & Engines
Information about fuel economy, emission standards and regulations, emission recall, certification and compliance, inspection and maintenance, diesel retrofit, evaluating the benefits of inventions designed to reduce emissions, and importing vehicles and engines.
Nonroad Engines, Equipment
Information about nonroad engines, equipment and vehicles: emission standards and regulations, certification and compliance, and diesel retrofit programs.
- Diesel Boats & Ships
- Gasoline Boats & Personal Watercraft
- Nonroad Diesel Equipment
- Forklifts, Generators & Compressors
- Lawn & Garden
- Snowmobiles, Dirt Bikes, & ATVs
Fuels & Fuel Additives
State & Local Transportation
Modeling, Testing, & Research
Information on modeling and inventories for estimating emissions from highway vehicles, nonroad sources, and fuels; testing and measuring emissions; research into clean automotive technologies; and emission factors research.