Stationary sources of air pollution, including factories, refineries, boilers and power plants, can emit a variety of air pollutants. The Clean Air Act directs EPA to control these emissions by developing and implementing:

• National Emissions Standards for hazardous air pollutants;
• New Source Performance Standards and Emission Guidelines for the six "criteria" air pollutants regulated by EPA, as well as for other air pollutants; and
• National standards or guidelines for ozone-forming volatile organic compounds from consumer and commercial products

Visit the links below to learn more about stationary air pollution sources and what EPA is doing to regulate air toxics from those sources.