Clean Air Act Overview

The Clean Air Act: Solving Air Pollution Problems with Science and Technology

Scientific Studies Show Air Pollution Harms People's Health and the Environment

image of air monitoring equipment at an air fieldAir monitoring equipment at an air field.

National Air Quality Standards Are Based on Science

Under the Clean Air Act, science is the foundation for setting health-based air quality standards for certain common air pollutants.

National Air Emissions Standards Are Based on Technology Performance

Under the Act, EPA and states (depending on the program) set emissions limits for motor vehicles and industrial facilities. In most programs, these limits are set using data on the emissions performance and costs of available technologies. <Learn more about setting emissions standards based on technology performance>

The Act Helps to Spur Advances in Clean Technology

The challenge of cleaning the air has helped to spur development of cleaner technologies such as smokestack scrubbers, the catalytic converter, and low-VOC paints. <Learn more about the development of clean technologies>

Scientific and Technical Foundations of Clean Air Act Programs - More Resources

In implementing the Clean Air Act, EPA gathers and synthesizes scientific information on air pollution effects, and serves as a clearinghouse of data on emissions, air quality, and air pollution controls. EPA scientists and technical experts conduct state-of-the-art analyses of air pollution problems and policies using a variety of technical tools.