Air Quality Office


Pollutants are generated by a wide variety of sources, including emissions. The Clean Air Act Amendments of 1990 required a reduction in the amount of allowable vehicle tailpipe emissions, initiated more stringent control measures in areas that still failed to meet the federal National Ambient Air Quality Standards (NAAQS) -- known as non-attainment areas, and provided for a stronger, more rigorous link between transportation and air quality planning.

The Infrastructure Investment and Jobs Act (IIJA), aka Bipartisan Infrastructure Law (BIL), was signed into law by President Biden on November 15, 2021. The law authorizes $1.2 trillion for transportation and infrastructure spending with $550 billion of that figure going toward “new” investments and programs.

In coordination with the Federal Highway Administration, TDOT provides several programs and resources to assist local communities in air quality improvement.

Contact Us

James K. Polk Building, Suite 900
505 Deaderick Street
Nashville TN, 37243-0344

Lia Prince, Manager

For more information, please contact the
TDOT Programs Supervisor, Andrea Noel by phone at 423-453-1196 or by email at