Ohio Administrative Code (OAC) Chapter 3745-31, Permits-to-Install New Sources and Permit-to-Install and Operate Program

Contact: Mike Hopkins (614) 644-3611


Currently Effective Rule Language


  • 3745-31-01 Definitions [PDF]
  • 3745-31-02 Applicability, Requirements and Obligations [PDF]
  • 3745-31-03 Exemptions and Permits-by-Rule [PDF]
  • 3745-31-04 Applications [PDF]
  • 3745-31-05 Criteria for Decision by the Director [PDF]
  • 3745-31-06 Completeness Determinations, Processing Requirements, Public Participation, Public Notice and Issuance [PDF]
  • 3745-31-07 Termination, Revocation, Expiration, Renewal, Revision and Transfer [PDF]
  • 3745-31-08 Registration Status Permit-to-Operate [PDF]
  • 3745-31-09 Variances on Operation [PDF]
  • 3745-31-10 NSR Projects at Existing Emissions Units at a Major Stationary Source [PDF]
  • 3745-31-11 Attainment Provisions - Ambient Air Increments, Ceilings and Classifications [PDF]
  • 3745-31-12 Attainment Provisions - Data Submission Requirements [PDF]
  • 3745-31-13 Attainment Provisions - Review of Major Stationary Sources and Major Modifications, Stationary Source Applicability and Exemptions [PDF]
  • 3745-31-14 Attainment Provisions - Pre-application Analysis [PDF]
  • 3745-31-15 Attainment Provisions - Control Technology Review [PDF]
  • 3745-31-16 Attainment Provisions - Major Stationary Source Impact Analysis [PDF]
  • 3745-31-17 Attainment Provisions - Additional Impact Analysis [PDF]
  • 3745-31-18 Attainment Provisions - Air Quality Models [PDF]
  • 3745-31-19 Attainment Provisions - Notice to the United States Environmental Protection Agency [PDF]
  • 3745-31-20 Attainment Provisions - Innovative Control Technology [PDF]
  • 3745-31-21 Nonattainment Provisions - Review of Major Stationary Sources and Major Modifications - Stationary Source Applicability and Exemptions [PDF]
  • 3745-31-22 Nonattainment Provisions - Conditions for Approval [PDF]
  • 3745-31-23 Nonattainment Provisions - Stationary Sources Locating in Designated Clean or Unclassifiable Areas Which Would Cause or Contribute to a Violation of a National Ambient Air Quality Standard [PDF]
  • 3745-31-24 Nonattainment Provisions - Baseline for Determining Credit for Emission and Air Quality Offsets [PDF]
  • 3745-31-25 Nonattainment Provisions - Location of Offsetting Emissions [PDF]
  • 3745-31-26 Nonattainment Provisions - Offset Ratio Requirements [PDF]
  • 3745-31-27 Nonattainment Provisions - Administrative Procedures for Emissions Offsets [PDF]
  • 3745-31-28 Review of Major Stationary Sources of Hazardous Air Pollutants Requiring MACT Determinations [PDF]
  • 3745-31-29 General Permit-to-Install and General PTIO [PDF]
  • 3745-31-30 Rescinded as of May 29, 2014
  • 3745-31-31 Rescinded as of May 29, 2014
  • 3745-31-32 Plant-wide Applicability Limit [PDF]
  • 3745-31-33 Site Preparation Activities Prior to Obtaining a Final Permit-to-Install or PTIO [PDF]
  • 3745-31-34 Permits-to-Install for Major Stationary Sources and Major Modifications of Sources Emitting Greenhouse Gases [PDF]

Historic Rule Versions

The Permit-to-Install rules govern the permitting of new sources of air pollution within the State of Ohio. The documents linked above on this page are the currently effective versions of the rules. To view versions of the above rules for historic reference, go here

Return to Main DAPC Rules Page

 As a precautionary response to COVID-19, Ohio EPA is currently operating with most staff working remotely. If you are working with our staff on a current project and you know the name of the employee you are working with, email them at firstname.lastname@epa.ohio.gov or call them directly. The Agency website has contact information for every district, division, and office. In order to reach us, please contact Ohio EPA’s main phone line at (614) 644-3020 or the main line for the division or office you are trying to reach.

After March 23, our district offices and Central Office will be temporarily closed and will have increasingly limited ability to receive deliveries, plans, etc. All entities are encouraged to submit plans, permit applications, etc., electronically where there are existing avenues to do so, such as the eBusiness Center (eBiz). Please refer to the list of available services on the main eBiz webpage. We encourage you to make use of all that apply, even if you have not used eBiz in the past. Plans under 25 MB can be emailed. For large plans over 25 MB, entities should work with the reviewer/division to upload via LiquidFiles. Directions for submitting docs via LiquidFiles is available on YouTube. We apologize for the inconvenience and thank you in advance for your understanding. If you wish to send hard copies of documents to any of Ohio EPA’s district offices, the best method to ensure we receive these documents is to send them via U.S. Mail. Since all offices are closed, deliveries outside of U.S. Mail (FedEx, UPS) will likely be returned because the offices are closed and deliveries cannot be made.

To report a spill or environmental emergency, contact the spill hotline (800) 282-9378 or (614) 224-0946