An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Clean Air Markets

Program Highlights
Environmental Issues
Basic Information


Follow Us on Social Media!

@EPAairmarkets on Twitter and Facebook

Clean Air Markets

EPA’s Clean Air Markets Division (CAMD) runs programs that reduce air pollution from power plants to address several environmental problems, including acid rain, ozone and particle pollution, and interstate transport of air pollution. CAMD programs include the Acid Rain Program (ARP), the Cross-State Air Pollution Rule (CSAPR), and the CSAPR Update.

States Covered by EPA's Acid Rain Program, Cross-State Air Pollution Rule, and/or CSAPR Update

View this map as a table

Map showing states affected by the CSAPR, CSAPR Update and Acid Rain Programs