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  2. New Source Review (NSR) Permitting

Clean Air Act Permitting System (CAAPS)

Helpful CAAPS Links
  • CAAPS Search Dashboard User Guide (pdf) (2.2MB)
  • Contact Us

Introduction

The Clean Air Act Permitting System (CAAPs) receives, stores, and facilitates the search of New Source Review (NSR) and title V air permits information issued by federal, state, local and tribal air permitting authorities. 

  • The NSR program is the preconstruction air permitting program, which requires major and minor stationary sources of air pollution with air emissions above certain emission limits to obtain an NSR permit before they begin construction of the new source or modification to an existing source. 
  • The Title V program is the operating air permits program, which requires major stationary sources and certain minor stationary sources of air pollution to obtain an operating permit to improve compliance with all applicable CAA requirements.

CAAPS Permit Action Information

Various state, local and tribal air permitting programs use CAAPS to submit NSR and title V permit information to EPA for each air permit action they issue. CAAPS allows air permitting authorities to submit their air permits for EPA review, as necessary, and allows users to view and research all the air permit information for a particular permit action such as the permit application, draft permit, fact sheet/statement of basis, response to comment document, and/or final permit in one location. The EPA also uploads EPA-issued air permit information into CAAPS.

Air permit data entered into CAAPS is available to the public for review under EPA's Permit Hub. 

CAAPS Questions and Data Entry Support

The EPA has ten Regional offices that cover all of the United States and its territories. If you have any questions about searching or reporting data to CAAPS or if you are a state, local or tribal permitting authority interested in submitting NSR and title V air permit information to CAAPS using EPA's Central Data Exchange, please contact any of the following  EPA regional staff for assistance. 

  • Region 01 - Undine Kipka
  • Region 02 - Jonathan Yoon
  • Region 03 - Casey Diaz
  • Region 04 - Kathleen Musmanno
  • Region 05 - Priyanka Painuly
  • Region 06 - Jonathan Ehrhart
  • Region 07 - Rumela Bhadra
  • Region 08 - James Floyd
  • Region 09 - Christa Leska
  • Region 10 - Valerie Gardner

New Source Review (NSR) Permitting

  • Learn About NSR
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  • GHG Permitting
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Contact Us About the New Source Review (NSR) Permitting
Contact Us About the New Source Review (NSR) Permitting to ask a question, provide feedback, or report a problem.
Last updated on June 22, 2026
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