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.

About EPA

Organization Chart for EPA's Office of Air and Radiation

Office of Air Policy and Program Support

Office of Air and Radiation (OAR) Assistant Administrator and Deputy Assistant Administrator

About OAR

Office of Program Management Operations

Office of Air Quality Planning and Standards (OAQPS)


  • Policy Analysis and Communications Staff
  • Central Operations and Resources
  • Air Quality Assessment Division
  • Air Quality Policy Division
  • Health and Environmental Impacts Division
  • Outreach and Information Division
  • Sector Policies and Programs Division
  • Washington Operations Staff

Office of Atmospheric Programs (OAP)

About OAP

  • Clean Air Markets Division
  • Climate Protection Partnership Division
  • Stratospheric Protection Division
  • Climate Change Division

Office of Transportation and Air Quality (OTAQ)

About OTAQ

  • Assessment and Standards Division
  • Compliance Division
  • Transportation and Climate Division
  • Testing and Advanced Technology Division

Office of Radiation and Indoor Air (ORIA)

About ORIA

  • Program Management Office
  • Indoor Environments Division
  • Radiation Protection Division
  • Radiation and Indoor Environments National Laboratory
  • National Analytical Radiation Environmental Laboratory