The South Carolina Clean Air Act is a set of air quality regulations adopted by the South Carolina Department of Health and Environmental Control (DEC) to ensure the air in the state meets the National Ambient Air Quality Standards. The act sets standards for emissions from sources such as power plants, factories, and motor vehicles. It also requires air quality monitoring and reporting and provides enforcement mechanisms to ensure compliance. There are three main types of South Carolina Clean Air Act regulations: State Implementation Plan (SIP), New Source Performance Standards (NPS), and National Emission Standards for Hazardous Air Pollutants (NSDAP). Each of these regulations sets specific standards for emissions from certain sources in order to help protect public health and the environment.