According to the U.S. Environmental Protection Agency, the Clean Air Act of 1970 created a major shift in the government's role in air pollution control. The legislation authorized the development of federal and state regulations to limit emissions from both stationary, or industrial, and mobile sources.
The U.S. Environmental Protection Agency states that four major regulatory programs were created as a result of the Clean Air Act of 1970 that affected stationary sources: The National Ambient Air Quality Standards, State Implementation Plans, New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants. In an effort to implement the various requirements included in this act, the enforcement authority was increased. This was done by creating the U.S. Environmental Protection Agency.