Clean Air Markets
Power Plant Emission Trends
EPA collects detailed sulfur dioxide (SO2), nitrogen oxides (NOX), and carbon dioxide (CO2) emission data and other information from coal-fired power plants across the country. Collected as part of the Acid Rain Program (ARP), the Clean Air Interstate Rule (CAIR), and the Cross-State Air Pollution Rule (CSAPR) (starting in 2015), these data are available online, making it easy for the public to understand emissions from these sources and to see when and where emission changes have occurred.
See our Emissions Tracking Highlights page for more detailed information on the power sector including quarterly emissions, unit characteristics, and emission controls. For more detailed information on the results of these programs, including emissions compliance, market analysis, and health and environmental results, see our progress reports.