States now have the option of submitting SIPs electronically to EPA. This is the EPA’s preferred method for air agencies to make SIP submissions.

Use EPA’s Central Data Exchange (CDX) to register and access the eSIP application.

• 2/10/15 Federal Register: Revisions to the Clean Air Act Section 110 Submission Requirements for State Implementation Plans and Notice of Availability of an Option for Electronic Reporting, Final Rule (PDF)(6 pp, 241 K, About PDF)
  • Fact Sheet on Submission Requirements and Electronic Reporting
• eSIP System Regional Contacts
• Registration Training Presentations, for Preparer and Certifier